HAPPINESS AND LIFE SATISFACTION AS INDICATORS OF SUBJECTIVE WELL-BEING: COMPARATIVE PERSPECTIVE
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Travel satisfaction and subjective well-being : a behavioralmodeling perspectiveCitation for published version (APA):Gao, Y. (2018). Travel satisfaction and subjective well-being : a behavioral modeling perspective. Eindhoven:Technische Universiteit Eindhoven.
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Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
PROEFSCHRIFT
ter verkrijging van de graad van doctor aan de Technische Universiteit Eindhoven, op gezag van de rector magnificus prof. dr. ir. F.P.T. Baaijens,
voor een commissie aangewezen door het College voor Promoties, in het openbaar te verdedigen op woensdag 11 april 2018 om 16.00 uur
door
Yanan Gao
geboren te Shaanxi, China
Dit proefschrift is goedgekeurd door de promotoren en de samenstelling van de promotiecommissie is als volgt:
voorzitter: prof.ir. E.S.M. Nelissen
1e promotor: prof.dr. H.J.P. Timmermans
2e promotor: prof.dr. Y. Wang (Chang’an University)
copromotor(en): dr. S. Rasouli
leden: dr.ir. D.F. Ettema (Universiteit Utrecht)
prof.dr. F. Witlox (Universiteit Gent)
prof.dr.ir. B. de Vries
Het onderzoek of ontwerp dat in dit proefschrift wordt beschreven is uitgevoerd in overeenstemming met de TU/e Gedragscode Wetenschapsbeoefening.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
A catalogue record is available from the Eindhoven University of Technology Library
ISBN: 978-90-386-4476-9
NUR: 955
Cover design: Feiyu Geng
Photograph: Xing Zheng
Printed by the Eindhoven University Press, Eindhoven, The Netherlands Published as issue 242 in de Bouwstenen series of the faculty of Architecture, Building and Planning of the Eindhoven University of Technology
Copyright © Y. Gao, 2018 All rights reserved. No part of this document may be photocopied, reproduced, stored, in a retrieval system, or transmitted, in any from or by any means whether, electronic, mechanical, or otherwise without the prior written permission of the author.
I hear and I forget, I see and I remember, I do
and I understand.
—Xun Zi
i
Acknowledgements
A long journey starts from Xi’an, an oriental city named Chang’an in ancient China, ends
in Eindhoven, a brilliant and innovative Dutch city in the west of Europe. Along the same
path with the “Ancient Silk Road”, this time we didn’t exchange silk, but we exchanged
culture and knowledge. Good things are a long time in coming. After six years of PhD
study, finally I completed the PhD thesis you are holding now, which probably was the
most challenging activity in my whole student career. Now, I am very glad that I have
chosen that long but fantastic path and came to Netherlands to share times and thoughts
with many people and to visit many places during the PhD period.
Hereby, I would like to express my thanks to people who have provided their direct
or indirect support to the completion of this doctoral dissertation. Your immense
contributions of ideas and time making my PhD research a success are highly appreciated.
First and foremost, my sincere gratitude to my supervisors Professor Harry
Timmermans and Professor Yuanqing Wang who gave me the golden opportunity to join
the Netherlands-China double degree PhD program. I am very grateful to my Dutch
supervisor, Professor Harry Timmermans from Eindhoven University of Technology, for
providing collaborations and interactions with excellent researchers working in the same
field with me. It brings me back to our first meeting in 2013, in a symposium held at
Chang’an University. The impressive lecture he gave and the inspiring communication
afterwards set my mind to continue my research under his supervision. His intelligence,
knowledge, optimistic and enthusiastic attitude towards his research has been
inspirational and motivational for me all along the way. His patient guidance provides
solid support during my research and scientific publications.
I would also like to thank my Chinese supervisor Professor Yuanqing Wang from
Chang’ an University for his continuous support during my PhD study. He encouraged me
to go abroad and to learn advanced techniques. He has the credit to open the door in my
research, to believe in me, and to give me the support from the home country which
always made me feel warm when I was studying overseas. With his support I finished
the survey design and completed the data collection, which is a very fundamental and
important aspect of this research.
ii
I am also very grateful to my co-supervisor in Eindhoven, dr. Soora Rasouli, a very
young and talented scientist. I very much appreciate her valuable work, her constructive
comments and suggestions for my PhD research. The excellent example she provided as
a successful female scientist is the role model for my future career.
I deeply appreciate the time working at the Urban Planning Group at Eindhoven
University of Technology. It was fantastic to have so many colleagues from different
countries working together. Co-workers from Netherlands, China, Iran, Indonesia, Turkey,
Greece, Italy etc., made this group international, young and enthusiastic. I would like to
thank my colleagues Aloys, Anna, Astrid, Bilin, Calvin, Dujuan, Elaheh, Elanie, Eleni, Fariya,
Feixiong, Gamze, Guangde, Iphigenia, Jia, Jianchuan, Jing, Jinhee, Lida, Linda, Nienke,
Pauline, Peng, Qi, Qing, Rainbow, Robert, Seheon, Sehnaz, Sunghoon, Tao, Tong,
Weiming, Wen, Wenshu, Widiyani, Xiaofeng, Xiaoming, Yang Ding, Yang Wang, Zahra,
Zhong for all their support. Thanks also go to Peter van der Waerden for the technical
support, and Mandy van de Sande and Marielle Kruizinga for all their help during my stay
at TUE.
I would also like to thank the graduate students Beiyan, Bo, Chao, Chenchen, Hui,
Ji, Junfeng, Junhong, Liu, Lixing, Qian, Rui, Shan, Shuo, Tengfei, Wenjie, Xiangyi, Xiaoxu,
Xing, Xinran, Xinxin, Xuan, Yanxing, Yuanyuan, Yuxiao and Zhouhao in department of
traffic engineering in Chang’an University. Your support and company make the last three
years of my PhD period in China so wonderful and memorable.
I acknowledge the China Scholarship Council for the financial support. I would also
like to thank the reviewers of my papers and the members of my PhD committee,
Professor Frank Witlox, Dr. Dick Ettema, and Professor Bauke de Vries for taking the time
and their valuable comments.
Besides, I would like to express my gratitude to my friends who bring me laughter,
joy and support in Netherlands, China and other parts of the world. I feel so lucky to
know many friends in Netherlands: Bao, Chi, Feiyu, Fenghua, Jiadun, Lei, Qinyu,
Shaoxiong, Shengnan, Shuli, Wei, Xiaoming, Xinrong, Xu, Yang, Zhijun. I am grateful for
our friendship and for all your moral support. I miss the time shared with my housemates
Adrien, Andrea, Cagil, Fabrizio, Francesca, Federica, Geoffrey, Giulio, Janos, Javier,
Jeroen, Juan, Leander, Lois, Lorenzo, Melis, Sophia, Stan, Viola, Xueting and Yves. I also
would like to thank all my friends from the Chinese dancing group and friends at SSCE
(Students Sports Centre Eindhoven). Thanks for filling my spare time with so many joyful
activities. I especially thank my wonderful friends who are the backbones of my life in
China: Menglei, Jingjing, Qin, Hao, Da, Ying, Qile, Fan, Lu, Xinwei and Bojie.
iii
My deepest gratitude goes to my beloved family in China, my dear parents, my
grandmother for their love and sacrifices not only during my PhD study, but also at every
step of my life. This dissertation is dedicated to you only for your smile when seeing this
book. I am very proud that I am the reason behind that smile. Thanks for my parents for
all the advices and support they give me to finish my work. Without you, I would never
have become the person I am today. I would like to thank my uncles and aunts, who
bring lots of happy times into my life.
高亚楠
12-2017
v
CONTENTS
Acknowledgements .................................................................................................. i
Contents ................................................................................................................ v
List of tables.......................................................................................................... ix
List of figures ........................................................................................................ xi
1 Introduction ........................................................................................................ 1
1.1 Background ....................................................................................... 1 1.2 Motivation ......................................................................................... 4 1.3 Research objectives ............................................................................ 4 1.4 Thesis outlines ................................................................................... 5
2 Concept and Literature Review ............................................................................. 7
2.1 Travel satisfaction .............................................................................. 7 2.1.1 What is travel satisfaction? ....................................................... 8 2.1.2 Measurement .......................................................................... 8 2.1.3 Causes and correlates .............................................................. 9
2.2 Subjective well-being ........................................................................ 18 2.2.1 Concept of subjective well-being ............................................. 18 2.2.2 Scales and different views of subjective well-being ................... 19 2.2.3 Relationship with travel satisfaction ........................................ 21
2.3 Theoretical framework ...................................................................... 21 2.4 Conclusions ..................................................................................... 26
vi
3 Data Collection .................................................................................................. 27
3.1 Motivation ........................................................................................ 27
3.2 Survey design .................................................................................. 27
3.2.1 Data consideration ................................................................ 28
3.2.2 Survey instrument ................................................................. 29
3.2.3 The questionnaire.................................................................. 29
3.3 Sample descriptives .......................................................................... 33
3.4 Conclusions ...................................................................................... 33
4 Objective and subjective correlates of satisfaction with daily trip stages .................. 35
4.1 Introduction ..................................................................................... 35
4.2 Correlates of travel satisfaction .......................................................... 37
4.2.1 Trip attributes ....................................................................... 37
4.2.2 Perceived service quality ........................................................ 38
4.2.3 Attitudes ............................................................................... 39
4.2.4 Mood ................................................................................... 39
4.2.5 Personality ............................................................................ 40
4.2.6 Socio-demographic characteristics ........................................... 40
4.3 Relationship between trip attributes, mood, personality traits and ratings
of satisfaction with daily trip stages .............................................................. 41
4.3.1 Key operational decisions ....................................................... 41
4.3.2 Structural hypotheses ............................................................ 43
4.3.3 Conceptual model .................................................................. 47
4.3.4 Measurements ...................................................................... 48
4.3.5 Sample recruitment and sample characteristics ........................ 50
4.3.6 Analysis and results ............................................................... 52
4.4 A reference-based model of trip stage satisfaction ............................... 57 4.4.1 Motivation ............................................................................ 57
4.4.2 Methodology ......................................................................... 58
4.4.3 Sample characteristics ........................................................... 63
4.4.4 Model formulation ................................................................. 64
4.4.5 Model estimation ................................................................... 66
4.4.6 Effects of trip attribute discrepancies and indifference tolerance 71
4.5 Conclusion ....................................................................................... 73
5 Prevalence of alternative processing rules in the formation of daily travel satisfaction in
different context ................................................................................................... 77
5.1 Introduction ..................................................................................... 77
5.2 Processing rules ............................................................................... 80
5.3 Sample characteristics....................................................................... 84
5.4 Analyzes and results ......................................................................... 86
5.4.1 Relationship between trip satisfaction and trip stage satisfaction 86
5.4.2 Relationship with daily travel satisfaction and trip satisfaction .... 91
5.5 Conclusion ....................................................................................... 96
vii
6 Linking travel satisfaction and subjective well-being .............................................. 99
6.1 Introduction ..................................................................................... 99
6.2 Structural hypotheses ..................................................................... 102
6.2.1 Travel satisfaction and subjective well-being .......................... 102
6.2.2 Personality and subjective well-being .................................... 103
6.3 Data collection and measurement scales .......................................... 104
6.3.1 Procedure ........................................................................... 104
6.3.2 Measurement ...................................................................... 105
6.3.3 Sample description .............................................................. 108
6.4 Structural equation model between travel satisfaction and subjective well-
being ...................................................................................................... 108
6.4.1 Conceptual framework ......................................................... 108
6.4.2 Validation ........................................................................... 109
6.4.3 Measurement model ............................................................ 115
6.4.4 Structural model ................................................................. 115
6.5 A latent class structural equation model of co-dependent relationships
between domain satisfaction and subjective well-being ................................ 117
6.5.1 Conceptual framework ......................................................... 118
6.5.2 Model estimation results ...................................................... 119
6.6 Discussion and conclusions .............................................................. 122
7 Conclusions and future work ............................................................................. 125
7.1 Summary ....................................................................................... 125
7.2 Contributions ................................................................................. 127
7.3 Limitations ..................................................................................... 129
7.4 Future research .............................................................................. 130
References ......................................................................................................... 133
Author Index ...................................................................................................... 149
Subject Index ..................................................................................................... 153
Summary ........................................................................................................... 155
Curriculum Vitae ................................................................................................. 159
List of Publications .............................................................................................. 160
ix
LIST OF TABLES Table 2-1 Summary of variables and applied methods in travel satisfaction research ... 11
Table 2-2 Summary of subjective well-being scales .................................................. 20
Table 2-3 Summary of the applied well-being constructs in travel behavior research ... 22
Table 3-1 Descriptive statistics of the sample (N = 1445) ......................................... 32
Table 4-1 Socio-demographic characteristics of the respondents (N = 1268) .............. 51
Table 4-2 Correlation matrix of predicting variables and outcome variables ................ 53
Table 4-3 Descriptive statistics of the variables used in the path analysis (N = 2916 trip
stages) ......................................................................................................... 54
Table 4-4 Goodness-of-fit of the model ................................................................... 54
Table 4-5 Standardized path estimates of direct, indirect and total effects.................. 56
Table 4-6 Socio-demographic characteristics of the respondents (N = 715 respondents)
.................................................................................................................... 64
Table 4-7 Regression results: trip stage satisfaction (Groups: 715; PT trip stages: 1402;
Average group size: 2) ................................................................................... 67
Table 4-8 Key points of the polynomial function ....................................................... 70
x
Table 5-1 Correlation between peak-end, summation and weighted averaging rules and
trip satisfaction .............................................................................................. 87
Table 5-2 Estimated resutls of conjunctive, disjunctive and linear processing rule for trip
satisfaction with panel effects ......................................................................... 87
Table 5-3 Estimated results of peak-end, summation and weighted averaging rules with
socio-demographic characteristics, mood, personality traits, and panel effects..... 89
Table 5-4 Estimated results of conjunctive, disjunctive and linear processing rule with
socio-demographic characteristics, mood, personality traits, and panel effects for trip
satisfaction .................................................................................................... 90
Table 5-5 Summary of Adjusted R2 for different models of trip satisfaction ................ 91
Table 5-6 Results of peak-end, summation and averaging rules for daily travel satisfacti- on................................................................................................................. 92
Table 5-7 Results of conjunctive, disjunctive, and linear processing rules without socio-
demographic, mood, and personality traits for daily travel satisfaction ................ 92
Table 5-8 Results of peak-end, summation and averaging rules with socio-demographics,
mood and personality traits for daily travel satisfaction ..................................... 94
Table 5-9 Results of conjunctive, disjunctive, and linear processing rule with socio-
demographic characteristics, mood and personality traits for daily travel satisfaction
.................................................................................................................... 95
Table 5-10 Summary of Adjusted R2 for different models of daily travel satisfaction .... 96
Table 6-1 Descriptive statistics of the sample (N = 1445) ....................................... 107
Table 6-2 Results of the exploratory factor analysis (N = 722) ................................ 110
Table 6-3 Results of the confirmatory factor analysis (N = 723) .............................. 111
Table 6-4 Standardized direct effect between subjective well-being variables (N=1445)
.................................................................................................................. 112
Table 6-5 Standardized direct effect of personality and socio-demographic variables on
subjective well-being (N=1445) .................................................................... 113
Table 6-6 Standardized direct effect of socio-demographic variables on personality traits
(N=1445) .................................................................................................... 114
Table 6-7 Goodness of fit measures for the structural equation model (N=1445) ...... 114
Table 6-8 Average latent class probabilities for residents’ most likely latent class
membership (Row) by latent class (Column) .................................................. 119
Table 6-9 Results of latent class structural equation model ..................................... 120
xi
LIST OF FIGURES
Figure 2-1 Theoretical Framework .......................................................................... 25
Figure 4-1 Conceptual model ................................................................................. 48
Figure 4-2 The Curve of Cubic Function .................................................................. 63
Figure 4-3The linear function of the difference between expected and experienced access
time ............................................................................................................. 70
Figure 4-4The linear function of the difference between expected and experienced waiting
time ............................................................................................................. 71
Figure 4-5 The cubic function of the difference between expected and experienced in-
vehicle time .................................................................................................. 72
Figure 4-6 The cubic function of the difference between expected and experienced egress
time ............................................................................................................. 72
Figure 5-1 Conjunctive rule .................................................................................... 83
Figure 5-2 Disjunctive rule ..................................................................................... 84
Figure 5-3 Sample characteristics (N = 1445) .......................................................... 85
Figure 6-1 Conceptual framework of SEM .............................................................. 109
Figure 6-2 Conceptual framework of LCSEM .......................................................... 119
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
1
1
INTRODUCTION
1.1 Background
Throughout history, the pursuit of happiness has never stopped with the development of
human civilization. Happiness has been considered to be the highest goal and ultimate
motivation for human actions. To get close to happiness through both thoughts and
behavior, first of all, we should make it clear what is happiness, and what state is
happiness. According to the experience of human beings, happiness is a subjective feeling
relative to objective happiness which depends on outward things to arouse happiness.
Over the years, philosophers are committed to explore the connotation of happiness and
tried to deeply understand the concept, expression and scope of it. In western philosophy,
the idea of happiness was originally developed by some Ancient Greek thinkers like
Epicurus and Aristotle. Early ideas equated happiness with eudaemonia and defined
happiness by external criteria such as virtue and holiness (Diener, 1984). Aristotle thought
Eudaemonia is gained leading a virtuous life which is a desirable state judged from a
particular value framework.
Chapter 1
2
In ancient China, the state of happiness is expressed by the word “乐” in most
cases. The meaning of “乐” can be summarized into two categories. First, it describes an
ideal state of happiness rather than the emotional reactions. Confucius said, “智者乐,仁
者寿。The wise are happy; the humane live long lives” (The Analects of Confucius). Zuo
Qiuming also said, “有德则乐,乐则能久。Virtue can make happiness, and this happiness
lives long” (The Commentary of Zuo). Second, it is hedonism, the word “乐” has been
used to express the hedonic or emotional feelings. For example, Confucius said, “有朋自
远方来,不亦乐乎? Is it not delightful having friends coming from faraway places?” (The
Analects of Confucius). The second meaning is similar with the happy mood, which
expresses a kind of positive emotion.
Starts from 1950s, many psychologists and social scientists have interested in the
formative studies of happiness or well-being mainly focusing on the definitions and how
to measure it (Jones, 1953; Wessman, 1957; Wilson, 1960). During the following decades,
many reviews of the history and philosophy of happiness have emerged (Chekola, 1975;
Culberson, 1977; Jones, 1953; Tatarkiewicz, 1976; Wessman, 1957; Wilson, 1960).
In the 1970s, researchers became interested in positive emotions rather than
negative emotional states, which were attracted more interests for decades, and the
theoretical and empirical work of happiness is emerging faster (Chekola, 1975; Culberson,
1977; Tatarkiewicz, 1976). The interpretation of happiness relates to multiple subjects
such as philosophy, psychology, sociology, and economics. Recent studies of happiness,
under the influence of “positive psychology” movement, are concerned happiness as an
individual and subjective state in which individuals judge their own happiness. There are
many terms used within the discipline describes self-reports on how well life is going,
including life satisfaction, hedonism, affective states, perceived desired satisfaction, a
hybrid of these accounts most commonly referred to as subjective well-being (commonly
abbreviated as SWB) (Haybron, 2000). The happiness or well-being resides within the
experience of the individual, although some objective conditions such as health and
wealth are seen as potential inflences on well-being (Campbell et al., 1976). Since the
subjectivity of well-being are recognized by the people, many researchers in the area of
subjective well-being avoid the term “happiness” because they are not same although the
terms are sometimes used synonymously.
Subjective well-being refers to how people experience the quality of their lives and
includes both affective and cognitive judgements (Diener, 1984). It is ‘a broad category
of phenomena that includes people’s emotional responses, domain satisfaction, and
global judgements of life satisfaction’ (Diener et al., 1999: p. 277). Life satisfaction
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
3
judgements refer to cognitive evaluations of an individual’s quality of life, called cognitive
well-being. Affective judgements refer to the moods and emotions people experience
through daily lives, called affective well-being. Relative to life satisfaction which is a global
cognitive evaluation of life, domain satisfaction refers to the evaluation of one’s
satisfaction with specific life domains, such as work, health, safety, social networks, etc.
Since the emergence of the subjective well-being studies over six decades ago,
the literature of satisfaction on other life domains has progressed rapidly especially in
social science and marketing research. One major stream is the study of customer
satisfaction. The definition, determinants and influence of customer satisfaction, which is
considered to be the key to a long-term relationship between buyers and sellers have
been studied by researchers for decades (e.g., Agnihotri et al., 2016; Anderson, 1973;
Churchill Jr and Surprenant, 1982; Fornell et al., 1996; Lin, 2007; Oliver, 1977; Parker
and Matthews, 2001; Yang and Peterson, 2004).
Although the study of customer satisfaction has a long history in fields such as
housing, tourism, psychology, business, economics and marketing (e.g., Anderson and
Sullivan, 1993; Churchill Jr and Surprenant, 1982; Fornell, 1992; Mouwen, 2015; Pitt et
al., 2014; Wirtz, 2001; Xiong et al., 2014), the concept of travel satisfaction has only
recently started to attract attention in transportation research (e.g., Abou-Zeid et al.,
2012; Aydin et al., 2015; Ettema et al., 2011; Friman et al., 2013; Stradling et al., 2007;
Susilo and Cats, 2014).
Travel satisfaction refers to people’s evaluation of transport services and their
experience during travel. The study towards travel satisfaction was put on the policy and
travel behavior research agenda since the last decade, reflecting the need to develop
improved instruments for assessing human well-being of transportation and transport
management policy. Transportation management decisions are not only evaluated in
terms of transportation objectives, but also in terms of traveler’s perception of transport
service. Therefore, understanding the causes and correlates of travel satisfaction and the
relationship between travel satisfaction and global subjective well-being is important not
only for transport companies to improve transport services, but also for governments and
policy makers to incorporate well-being into their public policies, for example to
encourage the widespread use of active and public transportation by measures which can
improve the satisfaction of public transport service (Bergstad et al., 2011; St-Louis et al.,
2014).
Chapter 1
4
1.2 Motivation
This research has been motivated by four main factors.
First, in general, developments in the subjective well-being studies and its
application to various life domains have called our attention to study this topic in
transportation field.
Second and more specifically, the strong dependence of travel behavior models
on objective factors, without systematic consideration of other subjective factors such as
mood and personality traits, motivated us to consider the effects of subjective factors on
travel satisfaction. Most prior studies have assumed that objective trip attributes influence
peoples’ travel satisfaction (Abou-Zeid, 2009; De Vos et al., 2015, 2016; Duarte et al.,
2009, 2010; Hussain et al., 2015; St-Louis et al., 2014; Susilo and Cats, 2014). Analysis
of the relationship between these objectives attributes and travel satisfaction allows
drawing conclusions with respect the relative contributions of the various attributes (trip
characteristics, vehicle attributes, etc.) to trip or travel satisfaction. The direct analysis of
satisfaction scores provides useful information about because it relates to the various
attributes of transport delivery. However, research in fields other than transportation has
suggested that subjective factors may also influence satisfaction and subjective well-
being (e.g., DeNeve and Cooper, 1998; Diener et al., 2003). It thus seems relevant to
investigate to what extent the effects of subjective factors such as personality traits and
mood bias the results of the effects of objective trip attributes on travel satisfaction.
Third, the fact that the daily trips become more complex as a result of multi-trip,
multi-modal accessible and rapid development of transport facilities, provided another
motivation for the study of the relationship between satisfactions in different context.
Forth, the studies of the relationship between domain-specific satisfaction and
subjective well-being have not considered travel satisfaction, even though travel is an
important daily consumption and experience. This motivated us to examine the
relationship between travel satisfaction and subjective well-being.
1.3 Research objectives
In light of the motivations described above, the objectives of the study are:
1. Develop our understanding of travel satisfaction and subjective well-being.
2. Investigate the corresponding effects of objective and subjective factors on
travel satisfaction
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
5
3. Examine the relationship between travel satisfactions in the context Multi-
trip, Multi-stage, Multi-attribute trip experiences.
4. Examine the relationship between travel satisfaction and subjective well-
being.
1.4 Thesis outlines
The thesis is organized in six succeeding chapters. Details of the chapter description are
discussed below.
Following this introductory chapter, Chapter 2 summarizes the contemporary
literature on travel satisfaction and subjective well-being. It reviews the concept,
measurement methods, and correlates of travel satisfaction in the transportation
literature. The concept, different views, measurement methods of subjective well-being
and the relationship with travel satisfaction have been viewed in this chapter. The
theoretical framework of this thesis is outlined in this chapter.
Chapter 3 will describe the data collection procedure and the sample
characteristics. A stepwise procedure of data collection is delineated starting from
questionnaire design via pilot studies to the final data collection. Descriptive statistics are
reported.
Chapter 4 studies the objective and subjective effect factors of travel satisfaction
in the context of trip stages. It describes a set of postulates about the causes and
correlates of trip stage satisfaction. It then describes the data we used in this chapter.
This is followed by the specification and estimation of a path analysis model that relates
travel satisfaction to its hypothesized correlates; and a reference-based model that relates
to examining the effects of difference between expected and experienced travel time and
cost.
Chapter 5 studies the processing rules in the formation of daily travel satisfaction
in the context multi-trip, multi-stage, multi-attribute travel experiences. It first introduces
and discusses the various procession rules that we investigate. Then it describes details
of the data collection and sample characteristics. It is followed by the discussion of the
analyzes and conclusions.
Chapter 6 studies the relationship between travel satisfaction and subjective well-
being. A structural equation models were built to examine the mutual dependency
between travel satisfaction and subjective well-being relative to satisfaction with other
life domains. Considering the heterogeneity of respondents, a latent structural equation
Chapter 1
6
model is formulated and estimates which assumes that the co-dependent relationships
between domain satisfaction and overall life evaluation vary between latent classes.
Chapter 7 concludes the thesis. It summarizes the research objectives, approach,
and findings, discusses the police implications and limitations of the research, and
presents directions for future research.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
7
2
CONCEPT AND LITERATURE REVIEW
2.1 Travel satisfaction
The transportation literature has recently witnessed a rapid growth in the number of
studies on travel satisfaction in general and in the context of public transportation in
particular (e.g., de Ona et al., 2016; Susilo and Cats, 2014; Yang et al., 2015). Main
objects of previous studies are such as commuting stress (eg. Van Rooy, 2006; Wener et
al., 2005); travel liking (Ory and Mokhtarian, 2005); affect during travel (eg. Kahneman
et al., 2004); travel well-being (Abou-Zeid and Fujii, 2016); satisfaction with public
transportation or other mode (eg. Friman et al., 2001; Friman and Garling, 2001);
travelers’ evaluation of their travel (Ettema et al., 2016, De Vos and Witlox, 2016); and
customer satisfaction with public transport services /passengers’ perception of PT quality
(Mouwen, 2015). Table 2-1 summarizes studies that were published in the major journals
over the last five years. We focus on the last five years as these tend to better reflect the
state of the art in this field of inquiry.
Chapter 2
8
2.1.1 What is travel satisfaction?
According to the definition of customer satisfaction, satisfaction is a judgment that a
service provides a pleasurable level of consumption-related fulfilment. Measuring
satisfaction with travel services would entail travelers’ judgments of their satisfaction with
the whole or parts of the travel service. However, customer satisfaction is less general
than domain-specific subjective well-being and only applies to those using the service.
Therefore, if we regard travel as one of the various life domains, the travel satisfaction
has broader meaning than the satisfaction of transport services. The definition of travel
satisfaction can also be summarized in two categories similar as subjective well-being:
the cognitive part or utilitarian appraisals (Strading et al., 2007), especially for driving
conditions and pubic transport services; and the affective part like commute stress
(Gatersleben and Uzzell, 2007; Novaco and Gonzalez, 2009).
2.1.2 Measurement
Over the years, many different measurement approaches have been developed to
measure satisfaction. Both single-item and multi-item scales have been used for directly
measuring satisfaction during travel. For example, Abou-Zeid et al. (2012) used a single-
item scale to measure people’s satisfaction of their commute trip by car before and after
receiving a free transit pass and being required to take transit for at least 2-3 days.
More recently, dedicated travel scales have been developed. A typical example is
the Satisfaction with Travel Scale (STS) based on 9-items (Ettema et al., 2011, 2012).
Ettema and his colleagues (2011, 2012) designed a domain-specific scale for travel which
is based on the generic Swedish Core Affect Scale (SCAS) (Västfjäll et al., 2002; Västfjäll
and Gärling, 2007). The Satisfaciton with Travel Scale (STS) was proposed as a
combination of cognitive and affective evaluaitons. For example, it has three components:
a cognitive evaluation of the quality of travel, an affective evaluation of feelings during
travel ranging from stressed to relax and an affective evaluation of feelings during travel
ranging from bored to excited (Ettema et al., 2011). This scale was first used by Ettema
et al. (2011) and has been evaluated by others later (De Vos et al., 2015; Ettema et al.,
2012; Friman et al., 2013; Olsson et al., 2013). De Vos et al. (2015) tested the reliability
and structure of the Satisfaction with Travel Scale (STS) using data on leisure trips from
Ghent (Belgium) and concluded that the specification of a single underlying dimension for
affect rather than two offers a superior fit to the Ghent data, both for all modes combined
and for car use and cycling separately. For public transport and walking a three-
dimensional structure is more appropriate. Anthor example is the Satisfaction with Daily
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
9
Travel Scale (SDTS) designed by Bergstad and his colleagues (2011), based on the
Satisfaction with Life Scale (SWLS) (Diener et al., 1985; Pavot and Diener, 1993). Five
statements were used for this scale.
Trave satisfaction can be measured through satisfaction with a range of quality of
service attributes. For example, some studies measured satisfaction of mode-specific
attributes, such as accessibility, crowding, congestion and reliability of public transport,
instead of directly asking about the overall satisfaction (e.g., Lai and Chen, 2011). In this
case, overall satisfaction could be interpreted as a measure of how travelers assess the
whole package of quality of service attributes (Hensher et al., 2003).
The practice of using a single-item or a multi-item scale varies substantially across
disciplines. In housing research, for example, the vast majority of studies has typically
used a simple rating scale to evaluate a set of housing attributes. In contrast, in marketing
research, conventional wisdom is to use multi-item scales (Anderson and Gerbing, 1982;
Churchill Jr, 1979; Haws et al., 2011; Jacoby, 1978). It has led to the development and
application of many difference scales. Sometimes, one cannot escape the impression that
the quest for high reliability statistics has resulted in the use of semantically redundant
items. It led Bergkvist and Rossiter (2007, 2009) to challenge conventional wisdom on
both theoretical and empirical grounds. They argued that for concrete and singular
constructs and concrete attributes, single-item scales might be the best to use. They
reported evidence that single item scales demonstrated equally high predictive validity as
multi-item scales. Several replication studies were conducted, leading to mixed results.
Kwon and Trail (2005) found that sometimes there was no significant difference between
single and multiple-item scales, whereas in other cases the single item scales produced
better results. On the other hand, Diamantopoulos et al. (2012) concluded that multi-
item scales clearly outperformed single-item scales in terms of predictive validity.
2.1.3 Causes and correlates
2.1.3.1 Objective correlates
We develop our summary about the explanatory variables used in the studies in Table 2-
1. The most commonly used explanatory variables of travel satisfaction are trip attributes
such as travel time, travel distance and travel cost. These trip attributes have been
operationalized in different ways. Typically, the absolute value of travel time or distance
has been used. St-Louis et al. (2014), for example, developed six mode-specific models
of trip satisfaction to investigate how the determinants of commuter satisfaction differ
across modes. The results show that travel time variables are important variables
Chapter 2
10
accounting for commuter satisfaction of all transportation modes. Increased travel time
had a significant negative effect on the degree of satisfaction with all six modes. However,
comparing coefficients shows that pedestrians, cyclists, and bus users are less negatively
impacted by longer travel times than drivers, and metro and train users. Zhang et al.
(2016) presented evidence from 13 cities in China that travel time and frequency of public
transport are statistically significant variables influencing passenger satisfaction. De Vos
et al. (2016) also found that longer travel times reduce travel satisfaction while longer
travel distances increase travel satisfaction for leisure trips by car and public transit.
Besides travel time, several studies examined the effects of waiting time, transfer
time and travel time in specific travel contexts. For example, Yang et al. (2015) examined
the transfer/commute time ratio and transfer cost as determinants of travel satisfaction,
and found that this ratio has a negative effect for “Walk-Metro-Walk” users, suggesting
that longer transfer walks tend to decrease satisfaction. Higgins et al. (2017) studied the
effects of travel time on satisfaction while considering exposure to congestion and
travelers’ perception of congestion. Results indicated that increasing travel time causes a
significant increase in dissatisfaction, and that the probability of being very dissatisfied
increases with the duration of exposure to congestion conditions.
Thus, an examination of the literature suggests that most scholars treated the
concept of satisfaction very similar to the concept of utility. They estimated a functional
relationship between physical, objective attributes of transport modes and/or trips, and
uni or multi-dimensional measures of satisfaction. This approach differs from
operationalizations of the concept of satisfaction adopted in other streams of literature
such as for example service quality research. Based on satisfaction theory, service quality
research acknowledges that satisfaction for the same product may differ between people
with the same socio-demographic profile because their expectations may differ.
Satisfaction reflects the extent by which customer experiences meet their expectations.
The gap between experienced and expected trip attributes may explain travel satisfaction
better than absolute trip attribute values. In this paper, trip attributes refer to value of
travel time including access time, waiting time, in-vehicle time and egress time, and level
of travel cost. However, studies in travel behavior research tend not to include the
difference between experienced and expected trip attributes. The only exception is Carrel
et al. (2016), who included scheduled travel time, which is a somewhat similar concept
as expected time, and found that the coefficient for the difference between scheduled
and observed in-vehicle travel time is significant.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
11
Table 2-1 Summary of variables and applied methods in travel satisfaction research
Study Dependent variable Independent variable Method/Model Linearity
Abenoza et al., 2017 Overall satisfaction with public transport
Quality of service attributes
14 year-specific dummy variables
5 region-specific dummy variables
Ordered logit model Nonlinear
Abou-Zeid and Fujii, 2016 Level of happiness/unhappiness
Time period Ordered logit model Nonlinear
Cao and Ettema, 2014 Travel satisfaction
Corridors
Socio-demographics
Transit use
Neighbourhood characteristics
Travel preferences
Residential preferences
Linear regression Linear
Carrel et al., 2016 Daily satisfaction with service
Baseline satisfaction ratings
Socio-demographics
Mode access
Mood
Subjective well-being
Scheduled and observed travel time
Ordered logit model Nonlinear
Cats et al., 2015 Overall satisfaction with public transport
Satisfaction with service quality
Frequency of using PT Ordered logit model Nonlinear
Chapter 2
12
Study Dependent variable Independent variable Method/Model Linearity
de Ona et al., 2016 Satisfaction with transit
Perceived costs
Perceived benefits
Attractive alternatives
Behavioral intentions
Feeling towards transit
Service quality
Structural equation model Linear
De Vos et al., 2016 Satisfaction with leisure trip
Neighbourhood
Attitudes toward travel and land use
Socio-demographics
Transport mode access and
affordability
Travel distance and travel duration
Linear regression model Linear
Ettema et al., 2016 Service satisfaction
Service attributes
Travel Mode
Socio-demographics
Ordered logit model Nonlinear
Friman et al., 2017 Travel satisfaction Travel attributes
Socio-demographics Structural equation model Linear
Fu and Juan, 2017 Satisfaction with public transport
Perceived service quality
Subjective norm
Perceived behavioral control
Structural equation model Linear
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
13
Study Dependent variable Independent variable Method/Model Linearity
Higgins et al., 2017 Commute satisfaction
Travel time
Congestion
Socio-demographics
Location
Multinomial logit model Nonlinear
Jaśkiewicz and Besta, 2014 Satisfaction with public transport or car
Quality of life
Place attachment
Identity scale
Correlation analyzes Linear
Mahmoud and Hine, 2016 Perception of users towards the overall bus service
Perceived quality of 29 bus indicators
Binary logistic regression model
Nonlinear
Mao et al., 2016 Travel satisfaction
Trip characteristics
Modal flexibility
Socio-demographics
Multimodal behavior
Multilevel regression model Linear
Mouwen, 2015 Measured satisfaction with public transport services
Service attributes
Socio-demographics Multiple regression model Linear
St-Louis et al., 2014 Commute satisfaction
Trip characteristics
Travel time
Socio-demographics
Travel preferences
Mode preferences
Linear regression Linear
Chapter 2
14
Study Dependent variable Independent variable Method/Model Linearity
Susilo and Cats, 2014 Travel satisfaction
Travel experience
Mood/Subjective well-being
Attitude
Past satisfaction
Socio-demographics
Trip characteristics
Survey type
Linear regression Linear
Susilo et al., 2017 Travel satisfaction
Subjective well-being
Travel modes
Socio-demographics
Survey type
Location
Multivariate analyzes Linear
Wan et al., 2016a BRT rider satisfaction
Service quality
Station amenities
Satisfaction with service quality and
the ticket system
Satisfaction with the other SBS
attributes
Other attributes (e.g. Bus-only lanes)
Structural equation model Linear
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
15
Study Dependent variable Independent variable Method/Model Linearity
Wan et al., 2016b BRT rider satisfaction
Service attributes
Frequency
Trip Purpose
Time
Weather
Socio-demographics
OLS linear regression Linear
Westman et al., 2017 Travel satisfaction Current mood
Cognitive performance Multivariate analyzes Linear
Ye and Titheridge, 2016 Satisfaction with commute
Travel mode choice
Travel attitudes
Built environment
Socio-demographics
Structural equation model Linear
Yang et al., 2015 Overall satisfaction of metro commuters
Socio-demographics
Journey details
Mode-specific service quality
Binary logistic regression Nonlinear
Zhang et al., 2016 Satisfaction with public transport
Public transport ownership
Contractual practices
Socio-demographics
Travel characteristics
City characteristics
Mixed logit model Nonlinear
Chapter 2
16
2.1.3.2 Subjective correlates
Satisfaction is also strongly linked with perceived service quality (Chen, 2008; Petrick,
2004). In other words, travelers who perceived good quality of public transit service are
more likely to have a higher level of satisfaction and continue to use this service. Most
studies found that service quality of public transport significantly affects customer
satisfaction, and consequently influences their behavioral intentions. Although the
selected service quality attributes differ between studies, frequency of service (e.g.,
Mouwen, 2015; Wan et al., 2016a), comfort (e.g., Mahmoud and Hine, 2016), information
(e.g., de Oña et al., 2016; Mouwen, 2015), accessibility (e.g., de Oña et al., 2016), and
reliability (e.g., Mahmoud and Hine, 2016), have been commonly examined attributes.
For example, Mouwen (2015) found that public transport users regarded on-time
performance, travel speed, and service frequency as the most important. Wan et al.
(2016a) also concluded that service quality measured in terms of frequency, on-time
performance and speed was the most important factor influencing overall satisfaction.
Cats et al. (2015) concluded that service provider responsiveness, service frequency and
reliability, and trip time were the key determinants of overall satisfaction using time series
data from Sweden. Mahmoud and Hine (2016) reported that 11 indicators had significant
impacts on user perception, including comfort of the bus, need for transfer, bus stop
location, availability of park and ride scheme, waiting and transfer time, reliability of the
service, frequency, security, bus fare, monthly discount, and information. de Oña et al.
(2016) concluded that service quality is mostly explained by comfort, accessibility, and
timeliness, while information, availability and safety also had significant effects. Lai and
Chen (2011) examined the relationship between satisfaction, service quality, perceived
value, involvement and behavioral intentions. They found that passenger behavioral
intentions rely on passenger satisfaction. Service quality has a positive effect on overall
satisfaction and behavioral intentions. However, although similar terminology has been
used in these studies, the definitions and measurement methods are different.
Therefore, in this study, a scale, which depicts traveler’s satisfaction of transit service
quality and overall satisfaction of each trip stage is adopted, and the effects of traveler’s
satisfaction of transit service quality on trip stage satisfaction are estimated.
Other explanatory variables that potentially may influence travel satisfaction are
psychological dispositions such as attitudes, personality traits and moods. Attitudes
defined as travel-related opinions may influence satisfaction because, for example, people
who are more concerned with environmental issues may be more satisfied with active
modes for their commute (Manaugh and El-Geneidy, 2013). Cao and Ettema (2014) found
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
17
that attitudes towards a certain travel mode influence the level of satisfaction of using
that mode. Ye and Titheridge (2016) also concluded that most travel-related attitudes
have both direct and indirect effects on commute satisfaction.
Compared to the large literature on objective correlates of travel satisfaction, the
literature on the effects of moods and emotions is very limited. Previous studies indicate
that feeling stressed affects commute satisfaction (e.g., Ory and Mokhtarian, 2005).
Abou-Zeid (2009) argued that if the respondent is surveyed on a day with bad weather,
bad day at work, etc., ratings of travel satisfaction may be lower than on an average day.
Carrel et al. (2016) measured general feelings simultaneously with satisfaction ratings
and found that respondents’ mood on a given day is significantly associated with travel
time satisfaction.
Personality traits are other important psychological dispositions that may affect
satisfaction. Although significant associations between personality traits and subjective
well-being have been reported (e.g., Costa and McCrae, 1980; Diener et al., 2003; Steel
et al., 2008; Richard and Diener, 2009), few studies have examined the effects of
personality on satisfaction in the domain of transportation.
2.1.3.3 Socio-demographic characteristics
The literature shows that several socio-demographic variables are associated with
different degrees of satisfaction (e.g., Cao and Ettema, 2014; Carrel et al., 2016; De Vos
et al., 2016; Ettema et al., 2016; Higgins et al., 2017; Susilo and Cats, 2014; Yang et al.,
2015). Susilo and Cats (2014) found younger travelers to report lower travel satisfaction
levels for their walking trips, when compared to fellow travelers. Cao and Ettema (2014)
found that older residents are more satisfied with light rail transit. De Vos et al. (2016)
also concluded that older people have more positive feelings and a more positive
evaluation of travel modes (except for bicycle trips). These results are consistent with the
literature showing that older individuals report higher levels of subjective well-being in
general (Diener and Suh, 1997). St-Louis et al. (2014) estimated the effects of age on
satisfaction, found age was significant for pedestrians, cyclists, drivers and metro users.
Yang et al. (2015) estimated the effects of socio-demographic variables on satisfaction
for different travel stages of metro commutes, found that “Walk-Metro-Walk” users
between 40 and 49 years of age are more likely satisfied with their journey.
Gender is another important socio-demographic variable that has been examined
in many studies. Results are mixed. Some studies (e.g., Ettema et al., 2016; Carrel et al.,
2016) found that gender is not significantly related to satisfaction, while other studies
Chapter 2
18
reported significant effects for gender. For example, St-Louis et al. (2014) concluded that
gender was a significant covariate of metro and pedestrian satisfaction. Likewise, Higgins
et al. (2017) found that males were more likely to be ‘very satisfied’ with their commutes
compared to females.
Besides age and gender, other socio-demographic characteristics may also
influence travel satisfaction. Country of origin was significant in a study on drivers’
satisfaction (St-Louis et al., 2014). Respondents from North America were significantly
more satisfied with their car commute than people from other countries. Similarly, Cao
and Ettema (2014) found that bike ownership leads to a lower satisfaction with light rail
transit. De Vos et al. (2016) concluded that the possession of a driving license and car(s)
has a positive effect on travel satisfaction for active travel and public transit.
Thus, in summary, although these results are mixed, and the effects of socio-
demographic variables tend to be relatively small, they cannot be ignored when assessing
travel satisfaction. It is important to note, however, that although socio-demographic
variables may be significant covariates in the model, what causes heterogeneity
satisfaction ratings are not the socio-demographic characteristics but psychological
factors which may significantly differ across segments of the sample as a function of their
socio-demographics. As an example, if senior citizens on average tend to be more satisfied
with their trip experiences, it might not be due to their age but to the fact that people of
increasing age in general tend to be more easy-going and less stressed and tend to
provide higher satisfaction ratings in general. In that sense, the study of travel satisfaction
differs from the study of activity-travel behavior. In the latter case, differences in travel
demand reflect differences in underlying needs and desires and possibly space-time
constraints. In turn, needs are related to socio-demographic variables. Such a direct
relationship between travel satisfaction and socio-demographics is much less clear, but
there may be indirect relationships with personality traits.
2.2 Subjective well-being
2.2.1 Concept of subjective well-being
The literature on subjective well-being (SWB) has been steadily increasing in psychology,
sociology and economic research since the 1970s. Diener (1984) argued that several
related terms have been used in different literatures with fuzzy and different meanings.
Diener et al. (1985) posited that SWB consists of three components, positive affect (PA)
and negative affect (NA) of immediate experiences, and a cognitive component of satis-
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
19
faction with life as a whole. (Diener et al., 1985). Ryan and Deci (2001) identified two
main views of subjective well-being – the hedonic and the eudaimonic view. Kahneman
et al. (1999) defined hedonic psychology as the study of “what makes experiences and
life pleasant and unpleasant”. In contrast, the eudaimonic view contends well-being is
more than pleasure attainment and pain avoidance. The eudaimonic view of well-being
focuses on meaning of life, personal growth and self-realization, and defines well-being
in terms of the degree to which a person is fully functioning. The term eudaimonic well-
being is valuable because it refers to well-being as distinct from happiness. As an
alternative to utility, subjective well-being has been proposed as a measure of individuals’
benefits in a number of domains (Kahneman et al., 1999). Subjective well-being can also
be defined in the context of specific domains, such as work life, family life, and leisure
(Schimmack, 2008). A specific form of domain-specific SWB is customer satisfaction
(Oliver, 2010) that focuses on goods or services that fulfil specific needs.
2.2.2 Scales and different views of subjective well-being
Numerous scales have been designed to measure subjective well-being. Diener et al.
(1985) differentiated between single-item measurements, such as the self-anchoring
ladder (Cantril, 1965), Gurin Scale (Gurin et al., 1960) and the Delighted-Terrible Scale
(Andrews and Withey, 1976), and multi-item scales such as the Life Satisfaction Index
(Neugarten et al., 1961) and the General Well-being Schedule (Dupuy, 1980).Some
researcher (Diener, 1984, Abou-Zeid, 2009) made a distinction between cognitive and
affective evaluation. Cognitive evaluation involves respondents rating their satisfaction.
In contrast, affective evaluation may be measured by using psychological and
physiological measures. Psychological measures are obtained by self-reports or observer
ratings. They could be single-item or multiple-item measures and they are the most
common type of well-being measures. Physiological measures, such as facial expressions,
autonomic and brain measures, are not frequently used but provide an alternative for
assessing emotions.
Different scales reflect different views on well-being. In another review of
subjective well-being, De Vos et al. (2013) articulated that measurement of hedonic well-
being consists of affective components which capture shorter-term feelings such as the
Positive and Negative Affect Scale (PANAS) (Watson et al., 1988), the Scale of Positive
and Negative Experience (SPANE) (Diener et al., 2010), the Swedish Core Affect Scale
(SCAS) (Västfjäll et al., 2002; Västfjäll and Gärling, 2007) and cognitive evaluation, which
is mostly measured by the Satisfaction with Life Scale (SWLS) (Diener et al., 1985; Pavot
and Diener, 1993).
Chapter 2
20
Table 2-2 Summary of subjective well-being scales
Study Scales
Hedonic Well-being
Watson et al., 1988 Positive and Negative Affect Scale (PANAS)
Västfjäll et al., 2002
Västfjäll and Gärling, 2007 Swedish Core Affect Scale (SCAS)
Diener et al., 2010 Scale of Positive and Negative Experience (SPANE)
Ettema et al., 2011
Ettema et al., 2012
De Vos et al., 2015
Satisfaction with Travel Scale (STS)
Diener et al., 1985
Pavot and Diener, 1993 Satisfaction with Life Scale (SWLS)
Bergstad et al., 2011 Satisfaction with Daily Travel Scale (SDTS)
International Well-Being Group, 2006
Stanley et al., 2011a, 2011b Personal Well-Being Index (PWI)
Eudaimonic Well-being
Ryff, 1989
Ryff and Singer, 2008 Psychological Well-Being Scale (PWS)
Ingersoll-Dayton et al., 2004 Personal Well-being
Waterman et al., 2010 Questionnaire for Eudaimonic Well-Being (QEWB)
Diener et al., 2010 Flourishing Scale
Ryan and Deci, 2001 Self-determination Theory
As discussed, few studies have used a eudaimonic view of well-being, which
emphasises meaning of life, personal growth and the realisation of the best in oneself
(e.g., Stanley et al., 2011a, 2011b). The best-known scale to measure eudaimonic well-
being is the Psychological Well-being Scale (PWS) (Ryff, 1989), which consists of six
dimensions. Other scales include the Questionnaire for Eudaimonic Well-Being (QEWB)
(Waterman et al., 2010) and the Flourishing Scale (Diener et al., 2010). McMahan and
Estes (2011) combined hedonic and eudaimonic aspects of well-being using the Beliefs
about Well-Being Scale. Table 2-2 summarizes different measurements of hedonic and
eudaimonic well-being.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
21
2.2.3 Relationship with travel satisfaction
Only recently, the travel behavior research community has jumped on the bandwagon of
satisfaction research and started to explore the relationship between travel satisfaction
and subjective well-being (Bergstad et al., 2011; Ettema et al., 2010; Hansson et al.,
2011; Martin et al., 2014; Sirgy et al., 2011). For example, Ettema et al. (2010) built a
theoretical framework arguing that participation in activities contributes to subjective
well-being and that the positive affect associated with travel has an impact on subjective
well-being. Bergstad et al. (2011) found that the effect of satisfaction with daily travel on
affective and cognitive subjective well-being is both direct and indirect. Sirgy et al. (2011)
developed a model, which described how positive and negative affects associated with
specific experiences of a trip influence tourists’ life satisfaction. Hansson et al. (2011)
found a significant relationship between commuting and health, while Martin et al. (2014)
concluded that active travel was correlated with psychological well-being. Therefore, this
literature seems to suggest that travel satisfaction is significantly related to subjective
well-being. Table 2-3 shows a summary of the applied well-being constructs.
2.3 Theoretical framework
As stated above, travel satisfaction and subjective well-being are presumably
interconnected. In terms of measuring travel satisfaction, respondents are prompted to
express their degree of satisfaction with their daily travel experiences. Some studies have
relied on simple rating scales, others have adopted more sophisticated multi-item travel
satisfaction instruments. Most of those scales are adapted in a trip level and not consider
the satisfaction of trip stage or integration of whole day’s trips. Therefore, to provide
these overall or summary satisfaction ratings, respondents need to retrieve and re-enact
their trips from memory, recall cognitive and affective aspects associated with their
experiences, process their evaluations of all attributes of the trip influencing their
satisfaction according to some processing rule and, finally express their degree of
satisfaction on the rating scale or in terms of the multi-item satisfaction instrument.
Reflecting on the sequence of events during a multi-stage trip, they need to process their
assessment of the bus stop environment, waiting time, on-time arrival, boarding, the
friendliness of the driver, ticket price, seat availability and quality, cleanness of the
vehicles, driving style of the driver, possible incidents during the trip, the alighting process,
and this is repeated for every stage of the trip, and for every trip on the day of interest.
Chapter 2
22
Table 2-3 Summary of the applied well-being constructs in travel behavior research
Study Sample area Constructs Method/Model
Abou-Zeid et al., 2012 Switzerland
Travel satisfaction
Attitudes towards car and
public transit
Correlation analysis
Abou-Zeid and Ben-Akiva,
2011 Web-based
Commute satisfaction
Overall well-being
Work well-being
Social comparative
happiness
Commute stress and
enjoyment
Personality
Quality of work environment
SEM
Abou-Zeid and Fujii, 2016 United States
Travel satisfaction
Attitudes towards car and
public transit
Ordered logit model
Archer et al., 2013 United States Well-being
Activity pattern
Multivariate ordered
response model
Bergstad et al., 2011 Sweden
Travel satisfaction
Activity satisfaction
Affective SWB
Cognitive SWB
Weekly mood
Regression analysis
Currie et al., 2009, 2010 Australia
Subjective well-being
Transport difficulties
Social exclusion
SEM
Delbosc and Currie, 2011a Australia
Subjective well-being
Transport difficulties
Social exclusion
Factor analysis
ANOVA
Diana, 2012 Italy
Satisfaction with public
transport
Frequency of transit use
Urban context
Correlations and
correspondence
analyzes
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
23
Study Sample area Constructs Method/Model
Ettema et al., 2011 Sweden
Travel satisfaction
Mood
Life satisfaction
ANOVA
Ettema et al., 2012 Sweden Travel satisfaction
In-vehicle activities Regression analysis
Olsson et al., 2013 Sweden Travel satisfaction
Life satisfaction Regression analysis
Ory and Mokhtarian, 2005 United States
Travel liking
Personality
Life style
Regression analysis
Ravulaparthy et al., 2013 United States Subjective well-being
Transport mobility
Ordered probit and
multinomial logistic
regression models
Spinney et al., 2009 Canada Transport mobility benefits
Quality of life ANOVA
Stanley et al., 2011a Australia
Subjective well-being
Social exclusion
Social capital
Connection with community
Ordered
polychotomous choice
model
Stanley et al., 2011b Australia
Risk of social exclusion
Social capital
Sense of community
Psychological well-being
Travel pattern
SEM
Accordingly, the conceptual framework is concerned with the following five
concepts:
1. Trip stage satisfaction
2. Trip satisfaction
3. Daily trip satisfaction
4. Travel satisfaction as a life domain
5. Subjective well-being
Chapter 2
24
The trip stage satisfaction is defined by the satisfaction of one segment of a whole
trip if they travel by multi-modes. One stage refers to the time spent on one specific travel
mode (exclude walking) including access time (walking time), waiting time, in-vehicle
time, possible transfer time and finally egress time. The trip satisfaction is defined by the
satisfaction of an entire trip from origin to destination including all the transfers between
travel modes. The daily travel satisfaction is defined by satisfaction of all trips in a full
day. Then a long-term evaluation of travel satisfaction is defined by the satisfaction of
travel which is regarded as a specific life domain like, for example, health and job. Finally,
subjective well-being is defined by a global evaluation of overall life covers all the life
domains together. Both hedonic well-being and eudaimonic well-being were entertained
in this study.
Subjective well-being has been proposed as a measure of individuals’ benefits in
different life domains. The relationship between overall subjective well-being and domain
life satisfaction has been a pertinent topic of research in social sciences for many decades.
On the one hand, the effect of satisfaction in a specific domain on overall subjective well-
being has been typically explained based on the bottom-up spill over theory of subjective
well-being (Sirgy, 2001). This theory posits that affect related to a consumption
experience contributes to affecting satisfaction in specific life domains, which in turn
influences satisfaction with life at large (Sirgy et al., 2011). In the context of travel, the
spill over theory would imply that high travel satisfaction would contribute to high
subjective well-being. For example, when a person has a good experience of one specific
trip (e.g. travel fast, no congestion, not crowd), he/she will have a good expression on
the whole day’s trip experiences. If this person continues experiencing fast and
comfortable trips every day, he/she overall subjective well-being increases.
On the other hand, there may also be an effect of overall well-being on travel
satisfaction, which would indicate a top-down approach in the study of subjective well-
being in the sense that their overall perspective on life may affect how people feel about
specific life domains (see, for example, Diener, 1984; Headey et al., 1991). For instance,
people who have a high level of subjective well-being are likely more satisfied with their
daily travel experiences. Few studies, however, have examined this top-down relationship
using empirical data. For example, Abou-Zeid and Ben-Akiva (2011) estimated the effects
of overall well-being on commute satisfaction using a structural equations model and
found that people who have a high level of overall well-being are likely more satisfied
with their commute. However, few studies have considered travel satisfaction although
travel is an important aspect among different life domains.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
25
Objective factors
Subjective factors
Well-being constructs
Socio-demographic characteristics
Subjective well-being
Travel satisfaction
Satisfaction with different life
domains
Top-down approach
Daily travel satisfaction
Trip satisfactionTrip stage
satisfaction
Bottom-up approach
Other life domains
Interdomain transfer effects
Trip attributes
Travelers’ Personality
Mood
Attitude
Perceived service quality
Processing rules
Hedonic well-being
Eudaimonic well-being
Figure 2-1 Theoretical Framework
Only since the study of travel satisfaction has appeared on the agenda of travel
behavior researchers, researchers have started to explore the relationship between travel
satisfaction and subjective well-being (Bergstad et al., 2011; Ettema et al., 2010; Hansson
et al., 2011; Martin et al., 2014; Sirgy et al., 2011). Even so, studies in this field have not
emphasized the eudaimonic view of well-being. In this study, we focus on both hedonic
and eudaimonic well-being and their relationships with travel satisfaction.
Both objective and subjective factors may have effect on travel satisfaction and
subjective well-being. One aim of this study is to estimate the contribution of those factors
to travel satisfaction and subjective well-being.
The theoretical framework of this thesis is shown in Figure 2-1.
Chapter 2
26
2.4 Conclusions
Although, the literature of satisfaction has progressed rapidly especially in social science
and marketing research, the concept of travel satisfaction has only recently started to
attract attention in transportation research. This chapter reviewed the existing literature
on subjective well-being and travel satisfaction studies. It reviews the concept,
measurement methods, and correlates of travel satisfaction in the transportation
literature. The concept, different views of well-being, measurement methods of subjective
well-being and the relationship with travel satisfaction have also been viewed in this
chapter. The insights from this systematic literature reviews provide the theoretical basis
for the empirical analyzes in this dissertation.
The summary of a literature review on the current state-of-the-art have shown
that vast majority of current studies have examined the objective factors which influence
the travl satisfaction. Thus, subjective factors need to be investigated mainly from the
perspective of how the subjective factors contribute to travel satisfaction and subjective
well-being. Another potential limitation of the state-of-the-art research on travel
satisfaction assumes that satisfaction ratings in multi-trip, multi-stage and multi-attribute
travel experiences follow simple aggregation rules. It provides another motivation for the
study of the relationship between satisfactions in different context and by other
aggregation rules. Prior studies suggest that an understanding of how travel satisfaction
contributes to overall well-being and how overall well-being influences travel satisfaction
is still an open question.
To explore these questions, it is crucial to first collect empirical data of travel
satisfaction and related information. These data can then be used to model the effects of
factors on travel satisfaction and the relationship between travel satisfaction and
subjective well-being. The following chapters describe the data collection and analytical
findings based on this concept.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
27
3
DATA COLLECTION
3.1 Motivation
The main objective of this study is to analyze the influence factors of travel satisfaction
and the relationship between travel satisfaction and subjective well-being. As discussed
in Chapter 2, the five domains, viz. trip attributes, perceived service quality, psychological
disposition, travel satisfaction, subjective well-being are interrelated. To fulfil the study
objectives, we need information regarding these five domains and how they influence
each other. In order to analysis the travel satisfaction in the context of multi-trip, multi-
modal, and multi-attribute, detailed trip dairy information of respondents is required. The
best way to obtain these data is to collect primary data by design a survey.
3.2 Survey design
In this section, we will summarize all components of the survey design in a step by step
manner under separate headings.
Chapter 3
28
3.2.1 Data consideration
The data requirements for this study can be divided into six segments, viz. socio-
demographic and general information, psychological disposition, trip diary data, travel
satisfaction data, perceived service quality data, subjective well-being data. The following
socio-demographic and general information were collected:
1. Age, gender, job type, work status, education level of the respondent.
2. Home location, household income, number of household members,
household car ownership.
3. Automobile and bicycle ownership and availability, frequency of using each
mode.
4. Attitude for each mode and environment.
Psychological disposition data includes personality traits of respondents and mood
data were collected by self-reported scales.
The central and the most crucial part of the survey concerns trip diary and travel
satisfaction. In this part, respondents were asked about their travel experience of a whole
day and the satisfaction of each stage of their trips, following information were collected:
1. The general information of the experienced day including the date, the day
of the week, and the satisfaction of the air quality.
2. Every trip of this day including the activity type before and after the trip, trip
origin and destination, start and end time, number of transfers.
3. Trip attributes include travel mode, access time, waiting time, in-vehicle time,
egress time, travel cost, mode-specific attributes and the expected value of
these attributes.
4. Satisfaction and expected satisfaction of each trip stage.
5. Perceived service quality of each mode.
6. Mode change intentions.
The next part of the survey is overall satisfaction and expected satisfaction of all
the trips and well-being of all the activities conducted in the experienced day.
The final part of the survey is about respondents’ subjective well-being data
includes overall life evaluation, overall life satisfaction, domain satisfaction and
eudaimonic well-being.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
29
3.2.2 Survey instrument
As this survey is quite demanding for respondents, face-to-face interviews were used for
conducting the survey. The survey was conducted in Xi’an City of China. Xi’an is the capital
city of Shaanxi Province, located in the northwest of China with a population of almost
8.46 million people. The data used in this study were collected in January 2015 using
random sampling. The interviewers consisted of graduate and master students of
Chang’an University who were specially trained for the interviews. Before going into the
field, several versions of the questionnaire were pre-tested in a pilot survey to ensure
respondents generally understood the questions. Changes in wording and especially
explanation were made until no more critical problems remained. The questionnaire was
designed into separate parts to suppress halo effects and reduce correlations.
3.2.3 The questionnaire
The questionnaire consisted of six modules. On the first page the respondents were
informed that the general aim was to investigate people’s travel satisfaction. The
questionnaire took between 1 and 2 hours to answer. The following modules were
included in the indicated order:
First, socio-demographic and general information module. In this module,
questions about age, gender, household car ownership, household income, education and
household size frequency of mode use, and attitudes included questions about if you
concern with the environment when travelling and if you are loyal users of public transport
or car were asked.
Second, personality traits module. Six personality traits were self-rated by
respondents including being critical, self-disciplined, impatient, reserved, easy-going and
calm. Being critical relates to people characterized by careful evaluation and judgment,
with a tendency to find and call attention to negative things. A person who is self-
disciplined could control himself and behave in a particular way without needing anyone
else to tell them what to do. An impatient personality concerns people who are restless
or short of temper. A reserved personality is marked by being self-restraint and reticence.
Easy-going refers to people who are relaxed and informal in attitude or standards. Being
calm relates to people who are not agitated without losing self-possession. These six
personality traits were selected from the Ten-Item Personality Inventory (Gosling et al.,
2003). Respondents were asked to rate the extent they agree or disagree with personality
statements such as “I see myself as critical”. Responses of personality involved an 11-
point Likert scale, ranging from “strongly disagree” to “strongly agree”.
Chapter 3
30
Third, trip dairy and trip information module. Respondents were asked to rate their
mood on the day of the trip. Nine different moods derived from the Gallup World Poll and
the European Social Survey (feeling enjoyment, relaxed, worried, sad, happy, depressed,
anger, stressed and tired) were measured on an 11-point scale, ranging from 0 to 10.
Zero means they did not experience the mood “at all”, while 10 means they experienced
the mood “all the time”. respondents were invited to recall their travel on the previous
day. The leading questions and instructions required respondents to re-enact their travel
on that day. Respondents were stimulated to discriminate between trips and trip stages.
We defined the trip as the whole period between origin and destination, including the
transfers between different travel modes. The trip stage was defined as the part of the
trip without a transfer. Walking was not regarded as a transfer but as access and egress.
It means that if a respondent transfers three times for completing a trip, this trip has
three trip stages. Before completing the requested information of each trip stage,
respondents were asked to provide information about trip origin, trip destination, start
time, end time and number of transfers. Next, questions about each trip stage took them
systematically and sequentially through the various stages of each trip: access, in-vehicle
travel, possible waiting, and egress time. For each stage of the trip, they were requested
to recall trip attributes such as travel time and travel costs and report the transport mode
they used for that stage. At the same time, their expectations about trip attributes were
asked. Having reconstructed the trip stages, respondents were asked to rate their degree
of satisfaction for every trip stage on an 11-point scale, ranging from “not satisfied at all”
to “extremely satisfied”.
Fifth, travel satisfaction and activity well-being module. Respondents were
requested to rate their satisfaction with each trip and activity well-being by asking the
questions: “Taking all things together, how satisfied would you say you are with your trip”
and “Taking all things together, how happy would you say you are with your activity”.
Sixth, perceived service quality of different modes. Public transport service quality
represented by 14 items including: frequency of service, punctuality, accessibility, number
of transfers, transfer time, on board duration, ticket price, seat availability, terminal/stop
conditions, in-vehicle environment, availability of information, driving skills of drivers, feel
safe from theft/attack and available at night by using a 11-point scale from “not satisfied
at all” to “extremely satisfied”. These items were mainly adopted from Lai and Chen
(2011), and amended according to the specific service characteristics in the Chinese
context.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
31
Finally, subjective well-being including life satisfaction, life evaluation, domain
satisfaction and eudaimonic well-being was measured. Four questions and five statements
were used to measure life satisfaction. The four questions are: (1) Imagine a ladder with
steps numbered from 0 at the bottom to 10 at the top. The top of the ladder represents
the best possible life for you and the bottom of the ladder represents the worst possible
life for you. On which step of the ladder would you say you personally feel you stand at
this time? (2) Overall, how satisfied with your life were you five years ago? (3) As your
best guess, overall how satisfied with your life do you expect to feel in five years’ time?
(4) Overall, to what extent do you feel the things you do in your life are worthwhile? The
five statements about life evaluation are (1) In most ways my life is close to my ideal; (2)
The conditions of my life are excellent; (3) I am extremely satisfied with my life; (4) So
far I have gotten all important things I want in life; (5) If I could live my life over, I would
change almost nothing. Values again ranged from 0 (“strongly disagree”) to 10 (“strongly
agree”). Individuals are assumed to rate their overall life satisfaction by cognitively
integrating their satisfaction ratings for various life domains. A total of fourteen questions
about satisfaction with different life domains were included in our questionnaire: standard
of living, health, achievements in life, personal relationships, safety at home, safety out
of home, relationship with neighbours, relationship with friends, relationship with
colleagues, future security, the amount of time you do the things that you like, quality of
local environment, work and general travel experience. Values ranged from 0 (“not at all
satisfied”) to 10 (“extremely satisfied”). Eudaimonic well-being was measured on the
basis of eight statements: (1) I lead a purposeful and meaningful life; (2) My social
relationships are supportive and rewarding; (3) I am engaged and interested in my daily
activities; (4) I actively contribute to the happiness and well-being of others; (5) I am
competent and capable in the activities that are important to me; (6) I am a good person
and live a good life; (7) I am optimistic about my future; (8) People respect me.
Respondents were invited to answer these questions using a ten-point scale, ranging from
0 (“strongly disagree”) to 10 (“strongly agree”).
To reduce possible correlations due to halo effects between personality traits and
mood, and between these constructs and satisfaction, the measurements of these
constructs were separated as much as possible. As indicated, first, data on personality
traits were collected, immediately after the elicitation of socio-demographic information.
Moods were measured separately before the trip diary was constructed. Ratings of
satisfactions of trip stages were solicited after retrieving all trip attributes in the trip diary.
All interviewers worked with the same format of the questionnaire.
Chapter 3
32
Table 3-1 Descriptive statistics of the sample (N = 1445)
Socio-
demographics
Category Observations Percentage
Age <18 17 1%
18-25 410 28%
25-35 672 47%
35-45 211 15%
45-55 95 7%
>=55 40 3%
Gender Male 669 46%
Female 776 54%
Education Lower than high school 89 6%
High school 303 21%
Associate degree/Bachelor 910 63%
Master 128 9%
PhD 15 1%
Household size
(person)
1 337 23%
2-3 659 46%
>3 449 31%
Household
income
(RMB/Month)
<4000 513 36%
4000-8000 566 39%
>8000 366 25%
Household car
ownership
No car 721 50%
One car 708 49%
More than one car 16 1%
Job type Full time employed (fixed schedule) 738 51%
Full time employed (flexible schedule) 304 21%
Part time employed 58 4%
Full time student 280 19%
Part time student 60 4%
Unemployed 5 0%
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
33
3.3 Sample descriptives
The survey was administered face to face to a random sample of 1464 respondents in
2015 in Xi’an, China. Total of 1445 respondents completed the questionnaire, represents
98.7% of the total sample. Sample characteristics are presented in Table 3-1. It
demonstrates that 47% of the sample is between 25 and 35 years of age, 28% is between
18 and 25 years old, while only 3% of the sample is older than 55. Table 3-1 also shows
that 54% of the sample is female, while 46% is male. 31% of the sample is living in
households with more than 3 persons, while 23% is living alone. Even though 73% of the
sample has a professional education, income levels are medium. More than half of the
sample (51%) is employed full time (fixed schedule).
3.4 Conclusions
In this chapter, the design and application of a survey was presented. This survey aimed
at collecting data on travelers’ satisfaction of their travel experiences and subjective well-
being. The data collection was conducted in Xi’an of China in January 2015 through a
face-to-face random sampling interview by trained interviewers and pencil-paper
questionnaires. The respondents include individuals from all over the Xi’an city. It was a
successful experiment and we obtained significantly high response rate. We believe
several factors accounted for that. First, the survey was anonymous, and we had informed
the respondents upfront about the nature, purpose of the survey, who will own and
handle the data and the demands of the survey. Second, the interviewers are trained,
and they can explain to the respondents when they meet difficulties during the interview.
We offered some reward such as small gifts to the respondents upon completion. We
conducted pilot survey and changed or excluded confused questions based on the
feedback from the pilot survey. We believe that the two rounds of pilot survey have
improved the design and response rate of the survey. For replication purposes we
recommend taking local socio-cultural issues into account.
However, there were some limitations in choice and design of the variables. For
instance, the measurement of travel satisfaction could have been altered to many other
scales focus on specific aspects instead of single-item scales. The measurement of
personality traits could include more comprehensive items. Some specific limitations were
discussed in relevant sections and summarized in the last chapter.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
35
4
OBJECTIVE AND SUBJECTIVE CORRELATES
OF SATISFACTION WITH DAILY TRIP
STAGES
4.1 Introduction
Travel satisfaction refers to people’s evaluation of transport services and their experience
during travel. As an potentially important factor contributing to subjective well-being, the
significance of travel satisfaction in the assessment of overall subjective well-being or
quality of life has been examined in several studies over the last couple of years (e.g.,
Abou-Zeid, 2009; Abou-Zeid and Ben-Akiva, 2011; Abou-Zeid and Fujii, 2016; Bergstad
et al., 2011; Cantwell et al., 2009; De Vos et al., 2013; Ettema et al., 2012; Olsson et al.,
2013; Reardon and Abdallah, 2013). These and other studies have generally concluded
that travel satisfaction plays a significant, but modest role in explaining quality of life.
Travel satisfaction has also played an important role in measuring the subjective
Chapter 4
36
evaluation of transport performance. These studies are similar to the dominant stream of
satisfaction research in housing, tourism and marketing. The aim is to examine the
relationship between housing, service or product attributes and consumer satisfaction.
The findings of these studies are useful to improve transportation systems and
technologies (Abou-Zeid et al., 2008). The analysis of travel satisfaction provides
management of transport companies and planning authorities direct feedback about their
service provision. Results may signal aspects of the transportation system and service
delivery that meet customer expectations and/or management targets, and aspects that
should be improved.
Therefore, understanding the causes and correlates of travel satisfaction is
important not only for transport companies to improve transport services, but also for
governments and policy makers to incorporate well-being into their public policies, for
example to encourage the widespread use of active and public transportation (Bergstad
et al., 2011; St-Louis et al., 2014).
The analyzes reported in this chapter are primarily motivated to improve the state
of practice in the application of travel satisfaction research to assess transport systems
and delivery. Most prior studies have assumed that objective trip attributes influence
peoples’ travel satisfaction (Abou-Zeid, 2009; De Vos et al., 2016; Duarte et al., 2009;
Hussain et al., 2015; St-Louis et al., 2014; Susilo and Cats, 2014). Analysis of the
relationship between these objectives attributes and travel satisfaction allows drawing
conclusions with respect the relative contributions of the various attributes (trip
characteristics, vehicle attributes, etc.) to trip or travel satisfaction. The direct analysis of
satisfaction scores provides useful information because it relates to the various attributes
of transport delivery. To draw valid conclusions, this approach implicitly assumes that the
variation in travel satisfaction ratings is only systematically influenced by the attributes of
the trip and vehicle. However, research in fields other than transportation has suggested
that subject factors may also influence satisfaction and subjective well-being (e.g.,
DeNeve and Cooper, 1998; Diener et al., 2003). It thus seems relevant to investigate to
what extent the effects of subjective factors bias the results of the effects of objective
trip attributes on travel satisfaction.
To the best of our knowledge, previous studies have not systematically
investigated the interrelationships between travel satisfaction, trip attributes, perceived
service quality and subjective factors such as personality traits. Rather, only the
relationships between two of these concepts has caught some attention (e.g., Morris and
Guerra, 2015; Ory and Mokhtarian, 2005; Steel et al., 2008). Consequently, if travel
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
37
satisfaction would be strongly correlated with psychological disposition such as
personality traits and moods, the estimated effects of trip attributes on travel satisfaction
may be misleading, implying that potentially wrong conclusions may have been drawn
and inadequate policy or management decisions may have been made. It is important,
therefore, to assess the strength and nature of the effects of subjective factors on travel
satisfaction before strong conclusions on the performance of travel services can be drawn.
In this chapter, therefore, we analyze the effects of trip attributes on travel
satisfaction simultaneously considering the effects of the mood and personality in order
to examine whether there are significant direct and indirect effects from mood and
personality on travel satisfaction. A path model is estimated to analyze these effects.
4.2 Correlates of travel satisfaction
4.2.1 Trip attributes
The most commonly used explanatory variables of travel satisfaction are trip attributes
such as travel time, travel distance and travel cost. These trip attributes have been
operationalized in different ways. Typically, the absolute value of travel time or distance
has been used. St-Louis et al. (2014), for example, developed six mode-specific models
of trip satisfaction to investigate how the determinants of commuter satisfaction differ
across modes. The results show that travel time variables are important variables
accounting for commuter satisfaction of all transportation modes. Increased travel time
had a significant negative effect on the degree of satisfaction with all six modes. However,
comparing coefficients shows that pedestrians, cyclists, and bus users are less negatively
impacted by longer travel times than drivers, and metro and train users. Zhang et al.
(2016) presented evidence from 13 cities in China that travel time and frequency of public
transport are statistically significant variables influencing passenger satisfaction. De Vos
et al. (2016) also found that longer travel times reduce travel satisfaction while longer
travel distances increase travel satisfaction for leisure trips by car and public transit.
Besides travel time, several studies examined the effects of waiting time, transfer
time and travel time in specific travel contexts. For example, Yang et al. (2015) examined
the transfer/commute time ratio and transfer cost as determinants of travel satisfaction,
and found that this ratio has a negative effect for “Walk-Metro-Walk” users, suggesting
that longer transfer walks tend to decrease satisfaction. Higgins et al. (2017) studied the
effects of travel time on satisfaction while considering exposure to congestion and
travelers’ perception of congestion. Results indicated that increasing travel time causes a
Chapter 4
38
significant increase in dissatisfaction, and that the probability of being very dissatisfied
increases with the duration of exposure to congestion conditions.
Thus, an examination of the literature suggests that most scholars treated the
concept of satisfaction very similar to the concept of utility. They estimated a functional
relationship between physical, objective attributes of transport modes and/or trips, and
uni or multi-dimensional measures of satisfaction. This approach differs from
operationalizations of the concept of satisfaction adopted in other streams of literature
such as for example service quality research. Based on satisfaction theory, service quality
research acknowledges that satisfaction for the same product may differ between people
with the same socio-demographic profile because their expectations may differ.
Satisfaction reflects the extent by which customer experiences meet their expectations.
The gap between experienced and expected trip attributes may explain travel satisfaction
better than absolute trip attribute values. In this paper, trip attributes refer to value of
travel time including access time, waiting time, in-vehicle time and egress time, and level
of travel cost. However, studies in travel behavior research tend not to include the
difference between experienced and expected trip attributes. The only exception is Carrel
et al. (2016), who included scheduled travel time, which is a somewhat similar concept
as expected time, and found that the coefficient for the difference between scheduled
and observed in-vehicle travel time is significant.
4.2.2 Perceived service quality
Satisfaction is also strongly linked with perceived service quality (Chen, 2008; Petrick,
2004). In other words, travelers who perceived good quality of public transit service are
more likely to have a higher level of satisfaction and continue to use this service. Most
studies found that service quality of public transport significantly affects customer
satisfaction, and consequently influences their behavioral intentions. Although the
selected service quality attributes differ between studies, frequency of service (e.g.,
Mouwen, 2015; Wan et al., 2016a), comfort (e.g., Mahmoud and Hine, 2016), information
(e.g., de Oña et al., 2016; Mouwen, 2015), accessibility (e.g., de Oña et al., 2016), and
reliability (e.g., Mahmoud and Hine, 2016), have been commonly examined attributes.
For example, Mouwen (2015) found that public transport users regarded on-time
performance, travel speed, and service frequency as the most important. Wan et al.
(2016a) also concluded that service quality measured in terms of frequency, on-time
performance and speed was the most important factor influencing overall satisfaction.
Cats et al. (2015) concluded that service provider responsiveness, service frequency and
reliability, and trip time were the key determinants of overall satisfaction using time series
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
39
data from Sweden. Mahmoud and Hine (2016) reported that 11 indicators had significant
impacts on user perception, including comfort of the bus, need for transfer, bus stop
location, availability of park and ride scheme, waiting and transfer time, reliability of the
service, frequency of the service, bus fare, monthly discount, security against crimes, and information at the station. de Oña et al. (2016) concluded that service quality is
mostly explained by comfort, accessibility, and timeliness, while information, availability
and safety also had significant effects. Lai and Chen (2011) examined the relationship
between satisfaction, service quality, perceived value, involvement and behavioral
intentions. They found that passenger behavioral intentions rely on passenger
satisfaction. Service quality has a positive effect on overall satisfaction and behavioral
intentions. However, although similar terminology has been used in these studies, the
definitions and measurement methods are different. Therefore, in this study, a scale,
which depicts traveler’s satisfaction of transit service quality and overall satisfaction of
each trip stage is adopted, and the effects of traveler’s satisfaction of transit service
quality on trip stage satisfaction are estimated.
4.2.3 Attitudes
Other explanatory variables that potentially may influence travel satisfaction are
psychological dispositions such as attitudes, personality traits and moods. Attitudes
defined as travel-related opinions may influence satisfaction because, for example, people
who are more concerned with environmental issues may be more satisfied with active
modes for their commute (Manaugh and El-Geneidy, 2013). Cao and Ettema (2014) found
that attitudes towards a certain travel mode influence the level of satisfaction of using
that mode. Ye and Titheridge (2016) also concluded that most travel-related attitudes
have both direct and indirect effects on commute satisfaction.
4.2.4 Mood
Compared to the large literature on objective correlates of travel satisfaction, the
literature on the effects of moods and emotions is very limited. Previous studies indicate
that feeling stressed affects commute satisfaction (e.g., Ory and Mokhtarian, 2005).
Abou-Zeid (2009) argued that if the respondent is surveyed on a day with bad weather,
bad day at work, etc., ratings of travel satisfaction may be lower than on an average day.
Carrel et al. (2016) measured general feelings simultaneously with satisfaction ratings
and found that respondents’ mood on a given day is significantly associated with travel
time satisfaction.
Chapter 4
40
4.2.5 Personality
Personality traits are other important psychological dispositions that may affect
satisfaction. Although significant associations between personality traits and subjective
well-being have been reported (e.g., Costa and McCrae, 1980; Diener et al., 2003; Richard
and Diener, 2009; Steel et al., 2008), few studies have examined the effects of personality
on satisfaction in the domain of transportation.
4.2.6 Socio-demographic characteristics
The literature shows that several socio-demographic variables are associated with
different degrees of satisfaction (e.g., Cao and Yang et al., 2015; Carrel et al., 2016; De
Vos et al., 2016; Ettema, 2014; Ettema et al., 2016; Higgins et al., 2017; Susilo and Cats,
2014). Susilo and Cats (2014) found younger travelers to report lower travel satisfaction
levels for their walking trips, when compared to fellow travelers. Cao and Ettema (2014)
found that older residents are more satisfied with light rail transit. De Vos et al. (2016)
also concluded that older people have more positive feelings and a more positive
evaluation of travel modes (except for bicycle trips). These results are consistent with the
literature showing that older individuals report higher levels of subjective well-being in
general (Diener and Suh, 1997). St-Louis et al. (2014), estimating, the effects of age on
satisfaction, found age was significant for pedestrians, cyclists, drivers and metro users.
Yang et al. (2015), estimating the effects of socio-demographic variables on satisfaction
for different travel stages of metro commutes, found that “Walk-Metro-Walk” users
between 40 and 49 years of age are more likely satisfied with their journey.
Gender is another important socio-demographic variable that has been examined
in many studies. Results are mixed. Some studies (e.g., Ettema et al., 2016; Carrel et al.,
2016) found that gender is not significantly related to satisfaction, while other studies
reported significant effects for gender. For example, St-Louis et al. (2014) concluded that
gender was a significant covariate of metro and pedestrian satisfaction. Likewise, Higgins
et al. (2017) found that males were more likely to be ‘very satisfied’ with their commutes
compared to females.
Besides age and gender, other socio-demographic characteristics may also
influence travel satisfaction. Country of origin was significant in a study on drivers’
satisfaction (St-Louis et al., 2014). Respondents from North America were significantly
more satisfied with their car commute than people from other countries. Similarly, Cao
and Ettema (2014) found that bike ownership leads to a lower satisfaction with light rail
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
41
transit. De Vos et al. (2016) concluded that the possession of a driving license and car(s)
has a positive effect on travel satisfaction for active travel and public transit.
Thus, in summary, although these results are mixed and the effects of socio-
demographic variables tend to be relatively small, they cannot be ignored when assessing
travel satisfaction. It is important to note, however, that although socio-demographic
variables may be significant covariates in the model, what actually causes heterogeneity
satisfaction ratings are not the socio-demographic characteristics but psychological
factors which may significantly differ across segments of the sample as a function of their
socio-demographics. As an example and related to findings in the literature, if senior
citizens on average tend to be more satisfied with their trip experiences, it might not be
due to their age but to the fact that people of increasing age in general tend to be more
easy-going and less stressed and tend to provide higher satisfaction ratings in general.
In that sense, the study of travel satisfaction differs from the study of activity-travel
behavior. In the latter case, differences in travel demand reflect differences in underlying
needs and desires and possibly space-time constraints. In turn, needs are related to socio-
demographic variables. Such a direct relationship between travel satisfaction and socio-
demographics is much less clear, but there may be indirect relationships with personality
traits.
4.3 Relationship between trip attributes, mood, personality
traits and ratings of satisfaction with daily trip stages
4.3.1 Key operational decisions
Before explaining the measurement of the central concepts and variables, we will first
motivate the key operational decisions underlying the present study. The first key decision
concerned the issue whether to analysis travel satisfaction at the trip level or at the trip
stage level. Most previous studies of travel satisfaction have considered the trip level. The
number of studies at the trip stage level is modest. We think that the choice of stage vs.
full trip primarily depends on the larger context of the study. If the focus is on studying
travel satisfaction in relation to loyalty or mode switching behavior, then the full trip level
seems the best choice as ultimately if there is any relationship between satisfaction and
loyalty/mode switching it is the overall satisfaction that probably matters most. On the
other hand, if the larger context is to identify the contribution of trip and vehicle
characteristics to satisfaction, multi-stage trips may involve too much variability, implying
that respondents need to process their potentially varying degrees of satisfaction into a
Chapter 4
42
single overall satisfaction rating. Therefore, in this study, we collected satisfaction data
for both the trip stage and overall trip level. In this specific paper, we focus our attention
at the trip stage level. As stages tend to be more homogeneous, ceteris paribus, a more
precise relationship between trip (stage) attributes and satisfaction is expected, providing
better information to managers and policy makers.
A second key operational decision concerns the timing of the measurement of
satisfaction. Traditionally, satisfaction has been measured retrospectively. For example,
in housing satisfaction studies, people or asked about their satisfaction with certain
attributes of their house and neighborhood. It reflects the belief that housing satisfaction
does not change suddenly and represents a state of mind, which can be prompted almost
any time in a sufficiently reliable manner. Similarly, a common way of measuring tourist
satisfaction is to interview tourist at airports after they finished their trip. Likewise, airlines
and hotel nowadays send forms to their customers some time after their trip. This process
may imply that respondents have forgotten about certain events and episodes, but this
may be an advantage in the sense that their satisfaction rating will be based on their
dominant, prevailing experiences they remember. Recently, we can witness a trend to
collect data about the emotional states of individuals using wearable wristbands, clip-ons
and smart phone based sensors and questionnaires. We think that this new technology
is especially useful for short-lived spontaneous emotional states (e.g. excitement, stress),
maybe to new experiences, that are difficult to retrieve from memory. Their advantage
may be less clear when measuring satisfaction related to routine behavior and
experiences. Another potential problem of the use of smart phone based instantaneous
measurement may be that respondents do not know when they are prompted for the first
time what to expect later during the trip. If they give a high satisfaction rating, there may
not be sufficient higher rating levels left to discriminate between better experiences later
during the trip. Similarly, if their first rating is too low, they may not have sufficient options
to discriminate and rate worse episodes of the trip. On the other hand, if respondents are
asked retrospectively to provide satisfaction rating of trip stages, they already
experienced the whole trip and thus can better use the rating scale. Thus, although this
is an important issue that needs further systematic research, we decided in this study to
apply a retrospective approach in which respondents were asked to express their degree
of satisfaction with the various stages of the trips they made the day before.
A third related operational decision is the measurement of mood. Unlike
personality, mood is a personal disposition that may last relatively short, compared to
personality. Particular incidents may sudden change a person’s mood. Thus, a first option
that we considered was to invite respondents according to sampling process to express
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
43
their mood throughout the day at the sampled moments. Respondents could be given a
report sheet and be asked at the end of each trip stage to report their mood and their
satisfaction with this part of the trip and any other information that is deemed relevant.
Experiences with a similar approach used to collected activity-diary data, however,
suggest that a relatively large percentage of respondents forgets to provide such data
during the trip and either does not report it at all or completes the data collection at the
end of the day. Alternatively, smart phones could be used to trace respondents and
prompt them to report mood and satisfaction when a trip end stage is detected. Although
we have access to some of the most powerful imputation algorithms, still such trip stage
ends are difficult to detect, particularly when respondents continue moving and/or waiting
times are short. If we would have sufficient budget, we probably would have implemented
a combination of these experience sampling methods and retrospective sampling. It
would allow cross-validation, and data fusion and imputation. However, because the
budget was limited, and the total questionnaire already requires around one hour to
complete, we decided to use the available budget for face to face interviews, which has
the advantage that the purpose of the data collection can be explained better and that
basic quality control can be conducted during the interview.
A potential disadvantage of retrospective measurement is that it may introduce
halo effects. Because of the time between the experiences and the rating of satisfaction,
the latter is more likely based on general impressions. On the other hand, the
juxtaposition of mood and satisfaction under the alternative measurement protocol may
induce or enhance correlations. Keeping in mind the aim of this study, avoiding the latter
was found to be more important that reducing halo affects. This was another reason to
choose retrospective measurement. The measurements of mood and trip satisfaction
were separated in the questionnaire in an attempt to avoid higher correlations due to
juxtaposition. Halo effects that occur due to insufficient discrimination between attributes
were suppressed as much as possible by instructing respondents to make provide
satisfaction ratings by comparison among the different attributes (clear breaks in the
interview) and using clearly defined anchors that were emphasized by the interviewers.
4.3.2 Structural hypotheses
4.3.2.1 Trip attributes and travel satisfaction
For evaluating the validity of reported travel satisfaction, a systematic review of the
literature suggests that travel satisfaction has been typically conceptualised as a function
of trip attributes such as travel time and cost. Some research suggests that travel
Chapter 4
44
satisfaction varies among travel modes and urban areas (e.g., Susilo and Cats, 2014).
Recent studies indicate that people who use active travel modes, like walking or cycling,
experience and evaluate their trips more positively compared to people who use other
means, like public transport and cars (e.g., Ettema et al., 2011; Olsson et al., 2013;
Friman et al., 2013). A few studies have examined mode-related attributes especially for
public transport services, for example real-time traveler information (Brakewood et al.
2014), crowding (Tirachini et al., 2013), reliability (Li et al., 2010) and multi-tasking when
using public transport (Ettema et al., 2012; Rasouli and Timmermans, 2014).
Few studies focus on the number of stages or mode transfers as potentially critical
factors in the commuting experience. Daily trips including commuter and leisure trips may
have more than one stage, and thus involve transfer(s). Previous studies mainly
considered the main trip stage of multi-staged trips, therefore neglecting the effects of
complexity and transfers of a multi-stage trip on travelers’ satisfaction. Only a few studies
focused on the satisfaction of different trip stages (e.g., Susilo and Cats 2014; Suzuki et
al., 2014). Moreover, as the trip mode is a key determinant of travel satisfaction, trip
stages using different trip modes should be analyzed separately. This study is therefore
based on measurements of travel satisfaction for different trip stages and examines the
relationship between trip stage travel satisfaction and the attributes of different stages,
and the effects of personality, moods and socio-demographic variables on trip stage
satisfaction.
Hence, given trip stage attributes as determinants of trip stage satisfaction and
the previous empirical support for trip-related attributes’ effects on travel satisfaction, we
hypothesize that trip attributes of each trip stage affect travelers’ travel satisfaction at
the trip stage level.
Hypothesis 1: Trip attributes of each trip stage are related to travel satisfaction of the trip
stages.
4.3.2.2 Mood and travel satisfaction
As satisfaction can be broadly viewed as a global retrospective judgement, it is
constructed only when asked. Therefore, satisfaction ratings are influenced not only by
the objective attributes, but potentially also by respondent’s mood and memory
(Kahneman and Krueger, 2006). Mood is a generic emotional state of the respondent that
tends to last for a certain duration. A positive mood may, ceteris paribus, result in higher
satisfaction ratings than a negative mood. Schwarz and Clore (1983) found that
satisfaction judgements were influenced by moods such as enjoyment and stress. The
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
45
relevant mood at the time of judgement such as enjoyment, relaxation, stress, and other
moods may affect the satisfaction ratings. Compared to the large amount of literature on
the objective correlates of travel satisfaction, the literature on subjective correlates, such
as mood and emotions, is relatively small. Abou-Zeid (2009) addressed context effects
on travel satisfaction ratings, which included the effect of mood. She thought that if the
respondent is surveyed on a day with coincident situations such as bad weather, bad day
at work, heavy congestion etc., the ratings of their travel satisfaction may change.
Although research on the relationship between mood and travel satisfaction is still in its
nascent stages, preliminary results support that mood is related to travel satisfaction.
Hypothesis 2: Mood is related to travel satisfaction.
4.3.2.3 Trip attributes and mood
In general, good or bad moods may be triggered by specific incidents and events in
different life domains. Friman (2004) found that different types of critical incidents elicited
affective responses. As discussed, we hypothesise that positive or negative moods may
influence a person’s ratings of satisfaction in the same and other domains, such as travel
satisfaction. In turn, however, travel experiences may cause mood changes. For example,
people may become feeling stressful and irritated when the travel time is long. Studies
found that reducing travel time reduces stress (Wener et al., 2003). Travel mode may
also influence mood. Ettema et al. (2011) found that mood is most positive for the car.
When traveling by bus, mood deteriorates with travel time and decreases with access to
bus stops. Morris and Guerra (2015) addressed the question how emotions, such as
happiness, pain, stress, sadness and fatigue, vary during travel and by travel mode,
controlling for demographics and other individual-specific attributes. Results found that
bicyclists experience more positive emotions than car passengers and car drivers. Bus
and train riders experience the most negative emotions. Travel stress, which often occurs
during commute trips, can be caused by long waiting and/or in-vehicle times,
unpredictability, traffic congestion and other conditions (Evans et al., 2002; Koslowsky et
al., 1995; Novaco et al. 1990; Novaco and Gonzales, 2009). Thus,
Hypothesis 3: Trip attributes are related to the mood.
4.3.2.4 Personality traits and travel satisfaction
As another potentially influential variable, affecting satisfaction, personality has emerged
during the last four decades of research on subjective well-being (e.g., Costa and McCrae,
1980; Diener et al., 2003; Steel et al., 2008; Richard and Diener, 2009). Relative to moods,
Chapter 4
46
personality traits are longer lasting. In fact, the correlation between subjective well-being
and personality traits such as extraversion and neuroticism has been found stronger than
correlations with any demographic predictor (Lucas and Fujita, 2000; Steel et al., 2008;
Richard and Diener, 2009). Other studies have examined associations between
personality traits and satisfaction in domains like job and marriage and found some close
relationships (Kelly and Conley, 1987; Judge et al., 2000; Judge et al., 2002). Kelly and
Conley (1987) found personality characteristics were important predictors of both marital
stability and marital satisfaction. Judge et al. (2000) found that core self-evaluations
measured in childhood and in early adulthood were linked to job satisfaction measured in
middle adulthood. Therefore, we hypothesize that personality traits also play a role in the
context of travel satisfaction. Thus,
Hypothesis 4: Individuals’ personality traits are related to travel satisfaction.
4.3.2.5 Personality traits and mood
Although the concepts of personality and mood refer to different time horizons, there is
also some evidence that between personality and mood are correlated. Some other
studies finding evidence of this relationship include Hennessy and Wiesenthal (1997),
Matthews and Gilliland (1999), Ilies and Judge (2002), Matthews et al. (2009) and
Zajenkowski et al. (2012). For example, individuals who are impatient and get stressed
out easily are likely to get irritated by transportation stressors more quickly than others
(Hennessy and Wiesenthal, 1997). Matthews and colleagues reviewed research devoted
to the personality–mood relationship and indicated that correlation coefficients vary
across studies and range from 0.1 to 0.62 (Matthews and Gilliland, 1999; Matthews et al.,
2009). Ilies and Judge (2002) found Neuroticism and Extraversion were associated with
average levels of mood. Zajenkowski et al. (2012) found that the relationship between
personality and mood varies across situations. As we focus on the relative short-term
mood of a specific day, personality is relatively more stable than mood while personality
is regarded as a long-term characteristic. Therefore, in this study, we hypothesize that
personality traits are related to moods. Thus,
Hypothesis 5: Individuals’ personality traits are related to moods.
4.3.2.6 Socio-demographic characteristics and travel satisfaction
The literature shows that socio-demographic variables are associated with satisfaction.
For example, Rittichainuwat et al. (2002) found a significant difference in travel
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
47
satisfaction of “environment and safety” between male and female travelers: male
respondents had higher satisfaction levels than female respondents. Furthermore, single
and married travelers showed significant differences in travel satisfaction. Married
travelers were more satisfied than single travelers. Regarding travelers’ age groups, they
found significant differences in travel satisfaction of “environment and safety” for different
age groups. Perović et al. (2012) conducted an empirical study about the effects of socio-
demographic characteristics on tourist travel behavior and satisfaction during their stay.
Results show that wage level was positively and significantly correlated with satisfaction.
Bergstad et al. (2011) found that socio-demographic variables accounted for 2% of the
variance in travel satisfaction. Results also indicated that older people have higher travel
satisfaction, whereas travel satisfaction tends to be lower for households with children at
home than for households with no children at home. Although the effects of socio-
demographic variables are relatively small, they cannot be ignored when assessing the
variance in travel satisfaction. In addition, there are correlations between mood and socio-
demographic variables. For example, Cameron (1975) found persons of higher
socioeconomic status reported more happy moods than those of lower status. Similarly,
we hypothesize that personality traits vary among people with different personal profile
(age, gender, education etc.). Thus,
Hypothesis 6: Individuals’ socio-demographics are related to their travel satisfaction of
trip stages.
Hypothesis 7: Individuals’ socio-demographics are related to their moods.
Hypothesis 8: Individuals’ socio-demographics are related to their personality traits.
4.3.3 Conceptual model
Based on the hypotheses formulated in the previous paragraphs, our conceptual model
is built as shown in Figure 4-1. Recalling that the aim of our study is to examine the
effects of personality traits and mood on travel satisfaction rating, we add moods and
personality to the commonly used framework, which explains travel satisfaction as a
function of trip attributes and socio-demographic variables. Thus, we hypothesize that
personality traits and moods affect ratings of satisfaction for different stages of a trip.
Further, we allow for the possibility that trip attributes may also influence moods. Finally,
we assume that individuals’ socio-demographic variables may be correlated with mood,
personality and travel satisfaction.
Chapter 4
48
Figure 4-1 Conceptual model
4.3.4 Measurements
4.3.4.1 Travel satisfaction
Respondents were asked to rate their degree of satisfaction for every trip stage on an 11-
point scale, ranging from “not satisfied at all” to “extremely satisfied”. Note that the use
of the 11 point scale is not very common is satisfaction research as most studies use 5 or
7 point scales. However, as respondents have the tendency to avoid extreme levels of
the scale, very few levels remain to discriminate between different degrees of satisfaction.
Although this may arbitrarily increase the strength of correlations, it also means that less
data points are available to identify and/or test the nature of the relationships between
the relevant constructs and trip satisfaction. Although it would also be relevant to analyze
overall satisfaction with the full trip, such focus would imply that respondents have to
trade-off the different aspects and experiences and express this in a single rating. To
allow for more variability in the ratings, in this paper we focus on trip stages.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
49
4.3.4.2 Trip attributes
Trip attributes included general trip attributes for each trip stage such as travel mode
(car, public transport, motorbike, bike or taxi), travel time (including access time, waiting
time, in-vehicle time and egress time), travel cost in general, cost by different modes and
mode-specific attributes. For walking, we collected data about walking conditions (on the
street, on the side walk, in a pedestrian street or others), walking safety at night, and
walking safety when crossing the street. For car users, car parking conditions (at home,
on street free, on street paid, parking garage free, parking garage paid or others), parking
time (less than one minute, 1-5 minutes or more than five minutes), and number of
passengers excluding driver (0, 1, 2 or more than 2) were measured. For public transport
users, seat availability (not crowded and seated, not crowded and not seated, crowded
and seated, crowded and not seated) and in-vehicle activities (working/studying, reading
for leisure, listening to music/radio, using internet, sleeping/resting, email/SMS/phone
call, gaming, talking to others, window gazing/people watching) were measured in this
study.
4.3.4.3 Mood
As we want to capture the effect of mood on people’s travel satisfaction, mood was
measured by inviting respondents to respond to nine items, representing different moods
including feeling enjoyment, relaxed, worried, sad, happy, depressed, anger, stressed
and tired. These mood questions were derived from the Gallup World Poll and the
European Social Survey. The questions ask respondents to express their moods on the
day for which satisfaction was measured on an 11-point scale, ranging from 0 to 10. Zero
means they did not experience the emotion “at all”, while 10 means they experienced the
emotion “all of the time”. Note that according to this scale, the perseverance of the mood
is measured. Alternatively, one could measure the frequency of different changes in mood.
However, this alternative was not chosen because moods are more difficult to recall,
especially if they lasted for short moments, and because retrospective measurements by
their very nature are more focused on dominant depositions.
4.3.4.4 Personality
For the measurement of personality traits, researchers have relied on a variety of
psychometric scales including the Ten-Item Personality Inventory (TIPI), which is a short
instrument based on the Big-Five personality domains (Gosling, et al., 2003). On the basis
of reliability and convergence tests, this 10-item measure of the Big Five dimensions is
suitable for this study in the situations when fewer measures are needed, or researchers
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50
can tolerate the somewhat diminished psychometric properties associated with very brief
measures. For each item, we systematically assessed whether we could reason the
relationship between the personality trait and trip satisfaction. Ultimately, we selected six
out of the ten-items and rewording some of them into Chinese for easy understanding:
critical, self-discipline, impatient, reserved, easy-going and calm. We assumed that these
personality traits might systematically affect people’s experience of travel and/or their
use of the measurement scale. Respondents were asked to rate the extent they agree or
disagree with the personality statements such as “I see myself as critical.” Responses of
personality involved an 11-point Likert scale, ranging from “disagree strongly” to “agree
strongly”. Higher scores reflect higher levels of the relevant personality dimension. Thus,
for reasons similar to the measurement of satisfaction, single-item scales were used to
measure different personality traits. While this approach is clearly problematic in
diagnostic, psychometric studies, we argue this approach offers sufficiently robust
information to analyze to effect of self-reported personality traits on travel satisfaction.
4.3.4.5 Socio-demographic characteristics
As socio-demographic variables are important explanatory variables of travel satisfaction,
mood and personality traits, we collected the data with respect to the following socio-
demographic characteristics of respondents: age (year), gender, household size (three
classes ranging from one person to more than three persons), household income (three
classes ranging from lower than 4000 RMB to more than 8000 RMB per month), education
(five classes ranging from lower than high school to doctoral degree) and household car
ownership (three classes ranging from no car to more than one car).
4.3.5 Sample recruitment and sample characteristics
Data used in this study were collected in the city of Xi’an, China in 2015 from a random
sample using a face-to-face paper-and-pencil survey. This survey concerned information
about all trips and trip stages on a specific day, including trip attributes (e.g., travel mode,
travel time and travel cost) and travel satisfaction. In order to examine the relationship
between travelers’ mood, personality and travel satisfaction, socio-demographic
characteristics, mood on that specific day and respondents’ personality traits were also
measured in the survey. Total of 1464 respondents participated in the study. Since
missing values and outliers may affect the results of the path model it is important to
detect them. Finally, satisfaction ratings from 1268 respondents of 2916 trip stages were
used in the analysis after data cleaning.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
51
Table 4-1 Socio-demographic characteristics of the respondents (N = 1268)
Socio-demographics Category Value Percentages
Age <18 17 1%
18 - 24 385 30%
25 - 34 587 46%
35 - 44 166 13%
45 - 54 83 7%
>=55 30 2%
Gender Female 705 56%
Male 563 44%
Education Lower than high school 82 6%
High school 273 22%
Associate degree/Bachelor 796 63%
Master 106 8%
PhD 11 1%
Household size 1 person 314 25%
2 - 3 persons 555 44%
More than 3 persons 399 31%
Household income
(RMB/month)
Less than 4000 478 38%
4000 – 8000 494 39%
More than 8000 296 23%
Household car
ownership
No car 675 53%
One car 525 41%
More than one car 68 5%
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52
Table 4-1 gives an overview of the socio-demographic characteristics of the
sample. It shows that 56% of the sample is female, while 44% is male. As for age, 46%
of the sample is between 25 and 34 years old and 30% is between 18 and 24 years old.
The youngest and oldest age categories have few observations. More than half of the
sample does not have a car in their household. Even though 72% of the sample has a
professional education, the prevailing income levels were medium (4000-8000 RMB) and
low (less than 4000 RMB). As for household size, 25% of the respondents is single. 44%
of the sample is living in 2 or 3-person households.
4.3.6 Analysis and results
Based on the conceptual model framework, explained in section 4.3.3, and considering
the nature of the measured constructs as explained in section 4.3.4, a path analysis model
was estimated to analyze the relationship between mood, personality traits, socio-
demographic variables, trip attributes and travel satisfaction of each trip stage. Before
estimating the model, however, we calculated the correlation between all variables to
check any problems of multicollinearity. Results of correlation matrix of predicting
variables and outcome variables are shown in Table 4-2. It shows that multicollinearity is
not an issue in the current data. Table 4-3 shows the descriptive statistics including mean,
standard deviation, Skewness and Kurtosis of the variables, which were finally used in
the path analysis model.
Next, the path model was estimated using MPLUS, a flexible co-variance based
latent variable modeling program (Muthén and Muthén, 2015). First, we built the model
based on the stipulated conceptual framework using all observed variables. As our
conceptual model does not say anything about the correlation of the error terms, we used
the modification index to decide on the inclusion of correlated errors. In particular,
correlated error between moods and personality traits was added to the model. As
discussed, for both mood and personality, we included a number of correlated errors
between different moods and personality traits. Path coefficients for moods and
personality traits that were not significant were deleted from the final model. The
estimated results of the final path model are shown in Table 4-5. The various statistics
such as Chi-square, degree of freedom. RMSEA, CFI, TLI and SRMR suggest a good model
fit, see Table 4-4. All path coefficients of the final model shown in Table 4-5 are nonzero
and significant at the 95% confidence level.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
53
Table 4-2 Correlation matrix of predicting variables and outcome variables
Variables Satisfaction Relax Happy Anger Critical Self-
disciplined Reserved
Easy-
going PT Taxi
Waiting
time
Walking safety at
night
Cost of
PT Age Gender
Satisfaction --
Relax 0.186** --
Happy 0.140** 0.443** --
Anger -0.095** -0.141** 0.013 --
Critical 0.050** 0.117** 0.069** 0.123** --
Self-disciplined 0.031 0.191** 0.110** -0.002 0.386** --
Reserved 0.000 0.137** 0.130** 0.091** 0.296** 0.304** --
Easy-going 0.065** 0.156** 0.150** 0.048** 0.029 0.103** -0.005 --
Public transport -0.192** -0.087** -0.066** -0.022 0.001 -0.007 0.001 -0.024 --
Taxi -0.135** -0.056** -0.037* -0.058** -0.042* -0.060** -0.069** 0.005 0.734** --
Waiting time -0.213** -0.092** -0.053** 0.052** 0.049** 0.001 0.016 -0.013 0.463** 0.410** --
Walking safety
at night 0.067** -0.023 -0.008 0.011 0.001 -0.011 -0.058** 0.009 0.173** 0.008 0.045* --
Cost of PT -0.082** -0.058** -0.057** 0.019 0.002 -0.030 -0.008 -0.021 0.544** 0.283** 0.203** 0.133** --
Age 0.087** 0.074** 0.010 -0.031 -0.016 0.155** 0.157** -0.144** -0.136** -0.149** -0.101** -0.001 -0.108** --
Gender 0.006 -0.029 -0.013 0.060** 0.079** 0.096** -0.046* 0.053** -0.030 -0.027 -0.026 0.086** -0.005 0.016 --
Chapter 4
54
Table 4-3 Descriptive statistics of the variables used in the path analysis (N = 2916 trip stages)
Mean
Std. Deviation
Skewness Kurtosis
Trip stage satisfaction 6.81 1.987 -0.588 0.331
Mood
Happy 6.26 3.204 7.699 180.909
Relax 6.02 2.404 -0.413 -0.292
Anger 2.03 2.602 1.276 0.596
Personality
Critical 3.51 2.686 0.300 -0.858
Self-disciplined 5.75 2.421 -0.434 -0.311
Reserved 5.24 2.469 -0.248 -0.374
Easy-going 6.15 2.232 -0.373 -0.041
Socio-demographics
Age 29.54 9.240 1.561 2.797
Gender (1 if Male, -1 otherwise)
-0.12
0.248 -1.940
Table 4-4 Goodness-of-fit of the model
Goodness of Fit Indices Value
Degrees of freedom 65
Chi-square 161.333
Chi-square / degrees of freedom 2.482
Root mean square error of approximation (RMSEA) 0.023
CFI 0.981
TLI 0.962
Standardized root mean square residual (SRMR) 0.018
Results provide support for all hypotheses shown in Figure 4-1. All path estimates
in the final model are statistically significant (p < 0.05). Table 4-5 show the standardized
path estimates of direct, indirect and total effects. Results show that trip attributes of
each trip stage including public transport, waiting time, and walking safety at night
significantly affect travel satisfaction. The results show that using public transport
negatively affects travel satisfaction, supporting H1. People who predominantly use public
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
55
transport are less satisfied than users of other transport means, suggesting that service
quality of public transport needs to be improved. Long waiting times lead to lower travel
satisfaction, which is an expected result. Moreover, walking safety at night positively
affects travel satisfaction. This indicates that safety when walking at night is an important
indicator of higher travel satisfaction.
Three moods including feeling happy, relaxed and anger have significant effects
on travel satisfaction. As we can see from the coefficients, positive moods like feeling
relaxed and happy will lead to higher ratings of travel satisfaction while negative moods
like anger will lead lower ratings. The magnitudes of the three coefficients are almost the
same. These results support our hypothesis that mood affects the ratings of travel
satisfaction (H2).
Trip attributes also affect mood as expected (H3). In other words, trip attributes
have both direct and indirect effects on travel satisfaction. This indicates that trip
attributes may be important determinants of a day’s mood. Results indicate that waiting
time has a negative effect on being relaxed. Results also show that cost by public ransport
negatively affects the mood of feeling happy. This suggests that reducing the waiting
time and cost will be an effective way to improve travel satisfaction.
Personality traits have been shown to have direct effect on travel satisfaction, thus
supporting H4. One interesting result is the positive influence of a critical personality score
on travel satisfaction. Generally, a person who is critical is sensitive to changes in their
daily life and always gives negative opinions if something doesn’t go perfectly. But our
study shows that more critical people may give higher ratings of travel satisfaction. This
may indicate that thinking more clearly and critically may reduce stress and anxiety and
make a person more positive when expectations are met. Another personality trait, which
affects travel satisfaction, is being easy-going. An easy-going personality also affects
travel satisfaction positively, indicating that people who are not easily worried or angered
end to give high ratings of travel satisfaction.
Beside the direct effect, results show that personality does affect travel satisfaction
indirectly, through mood, which in turn influences travel satisfaction. Results about the
effect of personality on mood show that being critical, self-disciplined, reserved and easy-
going positively affects the mood of feeling relaxed. Being self-disciplined, reserved and
easy-going has a significant positive effect on happy mood. Being critical, reserved and
easy-going positively affects the mood of anger. These results support our hypothesis
that personality affects mood (H5).
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56
Table 4-5 Standardized path estimates of direct, indirect and total effects
Dependent variables
Paths Direct effect
Indirect effects
Total effects
Travel satisfaction
Happy → Travel satisfaction 0.074 0.074
Relaxed → Travel satisfaction 0.097 0.097
Anger → Travel satisfaction -0.084 -0.084
Critical → Travel satisfaction 0.049 -0.003 0.046
Easy-going → Travel satisfaction 0.044 0.022 0.066
Public transport → Travel satisfaction
-0.128
-0.128
Taxi → Travel satisfaction
0.007 0.007
Waiting time → Travel satisfaction -0.134 -0.014 -0.148
Walking safety at night → Travel satisfaction
0.090
0.090
Age → Travel satisfaction 0.062 0.005 0.067
Gender → Travel satisfaction -0.004 -0.004
Self-disciplined → Travel satisfaction
0.015 0.015
Reserved → Travel satisfaction 0.011 0.011
Cost by public transport → Travel satisfaction
-0.003 -0.003
Happy Self-disciplined → Happy 0.062 0.062
Reserved → Happy 0.112 0.112
Easy-going → Happy 0.143 0.143
Cost by public transport → Happy -0.047 -0.047
Age → Happy
0.009 0.009
Relaxed Critical → Relaxed 0.050 0.050
Self-disciplined → Relaxed 0.112 0.112
Reserved → Relaxed 0.081 0.081
Easy-going → Relaxed 0.153 0.153
Waiting time → Relaxed -0.071
-0.071
Age → Relaxed 0.056 0.010 0.066
Gender → Relaxed
0.004 0.004
Anger Critical → Anger 0.091 0.091
Reserved → Anger 0.060 0.060
Easy-going → Anger 0.043 0.043
Taxi → Anger -0.082 -0.082
Waiting time → Anger 0.082 0.082
Gender → Anger 0.045 0.007 0.052
Age → Anger -- 0.004 0.004
Critical Gender → Critical 0.077 0.077
Self-disciplined
Age → Self-disciplined 0.167 0.167
Reserved Age → Reserved 0.164 0.164
Easy-going Age → Easy-going -0.141 -0.141
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
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Results also indicate that socio-demographic variables such as age and gender
affect travel satisfaction, personality and mood, thus supporting H6, H7 and H8. The
results of effects of age positively affect travel satisfaction ratings. Like Ory and
Mokhtarian (2005), we found that older people feel more satisfied with their travel
experience than young people. Older people more likely feel relaxed and being self-
disciplined than young people. Younger people are more easy-going than old people.
Gender (male) has a positive effect on being critical and the mood of anger. It indicates
that males are more likely to being critical and angry than females.
4.4 A reference-based model of trip stage satisfaction
4.4.1 Motivation
Despite extensive research on consumer satisfaction over the past decades in many
disciplines, the study of travel satisfaction has only recently attracted interest in
transportation research. Although the number of studies has rapidly increased recently,
this line of research is still in its infancy, mostly focusing on the development of
measurement methods and the identification of correlates of travel satisfaction (e.g.,
Cantwell et al., 2009; St-Louis et al., 2014; Susilo and Cats, 2014; De Vos et al., 2015;
Abou-Zeid and Fujii, 2016; Ettema et al., 2016; De Vos et al., 2016; Abenoza et al., 2017).
Based on satisfaction theory (Miller, 1977; Churchill Jr and Suprenant, 1982; Berry
and Parasuraman, 2004), satisfaction is defined as a psychological state that reflects the
evaluation of the relationship between customer expectations and product/service
delivery. The key notion is thus that individuals evaluate choice alternatives by comparing
experienced attributes against a set of reference points, defining their expectations. If
satisfaction is assumed to be a function of the discrepancy between expectations and
experienced attributes, any measurement and analysis of satisfaction should include some
function of the discrepancy between the experienced attributes and an individual’s
expectations. This approach is in contrast with common practice in travel behavior
research, which is almost invariantly based on linear regression and structural equations
analysis using the absolute values of the experienced attributes as explanatory variables.
Expectations are usually ignored.
In this study, we assume that trip satisfaction systematically varies in a non-linear
way with the discrepancy between expectations and actually experienced attributes of
the trip. Also, we assume an indifference tolerance around the difference between
Chapter 4
58
expectations and experienced attributes, reflecting the contention that small deviations
from expectations will have a minor effect on satisfaction.
We argue that although direct questioning of trip satisfaction triggers responses
that reflect the mapping of experienced trip attributes on some satisfaction scale, the
expressed satisfaction rating may also be influenced by attitudes, moods and personality
traits of the respondent at the time of measurement. Few studies in travel behavior
research do not filter out or control for the fact that respondents may differ in terms of
their assessment of experiences in general: some people are more critical than others, or
more disciplined or more/less patient. Ignoring such psychological dispositions implies
that any differences in satisfaction ratings due to personality traits and mood are wrongly
attributed to differences in trip or vehicle characteristics and/or the effects of socio-
demographic variables.
Thus, in contributing to the rapidly increasing literature on travel satisfaction, the
aim of this study is to develop a reference-based model of travel satisfaction that takes
attitudes, moods, personality traits and indifference tolerance into account. The
suggested model allows testing whether travelers feel indifferent within a certain range
of differences between the expected and experienced attribute level. Polynomial
expressions of differences between expected and experienced attributes are used to find
the best representation of the relationship between satisfaction and the discrepancy
between expected and experienced trip attributes.
4.4.2 Methodology
The method of analysis that has been used in prior travel satisfaction research depends
on the assumed functional relationship between the selected explanatory variables and
satisfaction, and on the nature of the dependent variable: the measurement of
satisfaction. Prior research has tended to be strongly empirically driven; the functional
form chosen was at the liberty of the researcher and was not logically deduced to capture
a particular theoretical construct or representation of a cognitive decision process.
Dominant are the studies that measured satisfaction on an interval scale (or assumed it
was) and hypothesized that satisfaction was linearly related to the selected explanatory
variables. These studies have typically used linear regression models (e.g., Cao and
Ettema, 2014; De Vos et al., 2016; Wan et al., 2016b), in case of single relationships or
structural equation modeling (e.g., de Ona et al., 2016; Ye and Titheridge, 2016) or path
analysis in case of estimating direct and indirect effects between satisfaction and the
selected explanatory variables
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
59
Other studies did not measure satisfaction on a scale with (assumed) interval
properties, but rather measured satisfaction on an ordinal scale. To do justice to the
ordinal scale, these studies have used discrete choice models to estimate the relationship
between attributes and satisfaction. For example, binary logistic regression (Mahmoud
and Hine, 2016; Yang et al., 2015), and ordered logit models (Abenoza et al., 2017; Cats
et al., 2015; Ettema et al., 2016) have been used in these cases.
Thus, in conclusion, it has been assumed in most studies that satisfaction is a
linear function of trip attributes possibly controlling for socio-demographic variables. A
smaller number of studies assumed that the satisfaction ratings were measured on an
ordinal scale and therefore methods such as ordered logit models. The latter models show
an S-shaped form between the sum of explanatory variables (which thus is linear) and
ordered categories of satisfaction. The former category of models is fundamentally linear
in nature. Virtually all these studies in travel behavior research conceptualised satisfaction
to reflect discrepancies between traveler expectations and experiences. Consequently,
the estimated model did not contain a reference point. While a linear model may be useful
when satisfaction is directly estimated as a function of attribute levels, a linear
specification seems more difficult to defend when a reference point is assumed or when
the model of satisfaction should be congruent with satisfaction theory. Thus, it is
worthwhile to examine whether nonlinear satisfaction models better replicate
observations of travel satisfaction.
Our literature review has revealed that traditionally travel satisfaction has been
measured as a linear function of attribute levels or intensities, such as travel time, waiting
time and travel costs. On the other hand, as commonly assumed in the consumer behavior
literature, satisfaction may be conceptualised to reflect the evaluation of the relationship
between customer expectations and service delivery. If a traveler is facing a delay, but is
also expecting a delay, his travel time satisfaction may be less negatively affected
compared to the situation that the delay is not expected.
Regardless of the decision to view satisfaction as a function of objective attribute
values or as a function of the discrepancy between objective attribute values and
expectations, theoretical motivations should drive the specification of the satisfaction
function. The dominant linear specification assumes that the change in satisfaction due
to a unit change in an attribute value is constant across the full attribute range. It may
be more realistic to assume that the negative impact on satisfaction becomes
disproportionally larger with increasing attribute values in an undesired direction.
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The inclusion of expectations complicates matters. Expectations serve as a
reference point. The curvature of the function may be symmetric around the reference
point, indicating that the same departure from the two sides of the reference point has
an identical impact on the degree of satisfaction. This may be an unrealistic assumption
because a worse than expected experienced attribute value may have a larger negative
effect than the positive effect of a better than expected attribute level. Accounting for
such an effect requires the specification of an asymmetric function. Kano (1984)
differentiated between attractive versus must be attributes. Attractive attributes for which
the experience surpasses expectations trigger satisfaction. The bigger the positive
surprise, disproportionally more satisfaction may be derived. In contrast, in case of must
be attributes, the increase in satisfaction may be increasingly smaller until the expected
value is reached. The use of a reference point also brings in the concept of consumer
tolerance. Are the marginal effects of discrepancies from the expected attribute level
monotonically decreasing or increasing according to a single underlying curve or are
travelers tolerant about small differences with the reference point, indicated by small
changes in satisfaction (asymptotically equal to zero)?
In this study, we hypothesize that satisfaction is a non-linear function of the
difference between the experienced attribute level and expectation. If the experienced
attribute level outperforms the expected attribute level, satisfaction increases non-
proportionally to the difference. Similarly, if the experienced attribute level underperforms
the expected value, satisfaction decreases non-proportionally to the differences.
Moreover, we hypothesize that individuals may tolerate small deviations from the
expected attribute value.
Elaborating Finn (2011), we use polynomials to estimate the satisfaction function.
The estimated parameters indicate whether theoretical hypotheses are supported. More
specifically, we estimate a cubic polynomial function that can flexibly accommodate all
mentioned behavioral mechanisms. Moreover, we assume that beyond socio-
demographics, attitudes, moods, service quality and personality traits may systematically
shift the satisfaction function. Thus, the cubic polynomial function of satisfaction was
specified as:
𝑆𝑖𝑛 = 𝐶𝑖 + ∑ (𝛼𝑘(𝐸(𝑋𝑖𝑘) − 𝑋𝑖𝑘)3 + 𝛽𝑘(𝐸(𝑋𝑖𝑘) − 𝑋𝑖𝑘)2 + 𝛾𝑘(𝐸(𝑋𝑖𝑘) − 𝑋𝑖𝑘))𝐾𝑘=1 +
∑ 휃𝑑𝐷𝑑𝑛𝐷𝑑=1 + ∑ 𝜓𝑚𝑀𝑚𝑛
𝑀𝑚=1 + ∑ 𝜔𝑝𝑃𝑝𝑛 + ∑ 𝜆𝑎𝐴𝑎𝑛
𝐴𝑎=1
𝑃𝑝=1 + ∑ 𝜑𝑞𝑄𝑞𝑛
𝑄𝑞=1 + 𝜖𝑖𝑛 4.1
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
61
where,
𝑆𝑖𝑛 is the degree of satisfaction of individual n for choice alternative i;
C is a constant;
𝐸(𝑋𝑖𝑘) is the individual’s expectation of the value of attribute k for choice alternative i;
𝑋𝑖𝑘 is the experienced value of attribute k for choice alternative i;
𝐷𝑑𝑛 describes individual n on socio-demographic variable d;
𝑀𝑚𝑛 describes individual n on mood m;
𝑃𝑝𝑛 describes individual n on personality trait p;
𝐴𝑎𝑛 describes individual n on attitude variable a;
𝑄𝑞𝑛 is the score of individual n on service quality variable q;
𝛼, 𝛽, 𝛾, 휃, 𝜓, 𝜔, 𝜆, 𝜑 are parameters to be estimated;
𝜖 is a random disturbance term assumed to be normally distributed with zero mean and
standard deviation 𝜎.
To demonstrate the potential of the cubic function, note it may have 1, 2 or 3
distinctive roots. For our discussion, the case of three distinctive roots suffices to
demonstrate the flexibility of the suggested model. The interval between two critical
points can be viewed as the attribute range in which individuals tolerate the difference
between their expectation and experience. Taking the first derivative of equation 4.1
gives the critical points. Thus,
∂𝑆𝑖𝑛
∂(𝐸(𝑋𝑖𝑘)−𝑋𝑖𝑘)= 0 4.2
3𝛼𝑘(𝐸(𝑋𝑖𝑘) − 𝑋𝑖𝑘)2 + 2𝛽𝑘(𝐸(𝑋𝑖𝑘) − 𝑋𝑖𝑘) + 𝛾𝑘 = 0 4.3
(𝐸(𝑋𝑖𝑘) − 𝑋𝑖𝑘) = −2𝛽𝑘±√4𝛽𝑘
2−12𝛼𝑘𝛾𝑘
6𝛼𝑘 4.4
It implies that people are indifferent between
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62
(𝐸(𝑋𝑖𝑘) − 𝑋𝑖𝑘) = −2𝛽𝑘+√4𝛽𝑘
2−12𝛼𝑘𝛾𝑘
6𝛼𝑘 4.5
and
(𝐸(𝑋𝑖𝑘) − 𝑋𝑖𝑘) = −2𝛽𝑘−√4𝛽𝑘
2−12𝛼𝑘𝛾𝑘
6𝛼𝑘 4.6
This property allows the function to capture any indifference tolerance within a
certain continuous attribute range (if such a phenomenon exits) without a priori assuming
or explicitly estimating a certain threshold. Obviously, the interpretation of the results in
terms of tolerance requires a judgement beyond the mathematical result in the sense
that one needs to judge whether the difference in satisfaction is small enough,
considering the application domain, to interpret it as a tolerance.
Another property of the polynomial allows capturing a change in the satisfaction
function from convexity to concavity. This property can be investigated by determining
the inflection point and the sign of the second derivative at any point. In order to derive
the inflection point, the second derivative needs to be equal to zero. That is,
∂2𝑆𝑖𝑛
∂(𝐸(𝑋𝑖𝑘)−𝑋𝑖𝑘)= 0 4.7
6𝛼𝑘(𝐸(𝑋𝑖𝑘) − 𝑋𝑖𝑘) + 2𝛽𝑘 = 0 4.8
(𝐸(𝑋𝑖𝑘) − 𝑋𝑖𝑘) =−𝛽𝑘
3𝛼𝑘 4.9
Figure 4-2 shows the curve of this case, with the critical points and inflection point.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
63
Figure 4-2 The Curve of Cubic Function
4.4.3 Sample characteristics
The survey was conducted in the city of Xi’an, China in 2015 using random sampling.
Total of 1464 respondents participated in the study. In this paper, the trip stages involving
public transport were used for analysis. Outliers were removed as they may affect the
results of the polynomial estimation. Finally, satisfaction ratings of 1402 trip stages
involving public transport from 715 respondents were used in the analysis.
Table 4-6 gives an overview of the socio-demographic characteristics of the
sample. It shows that the percentage females in the sample is slightly higher than the
percentage males. This overrepresentation may be due to the fact that women were more
willing to complete the questionnaire, and/or they use public transport more often than
males do. As for age, almost half of the sample consists of respondents between 25 and
34 of age. The percentage mid-aged respondents and elderly is relatively small. One
reason may be that the survey was conducted in the evening, when a disproportionally
higher number of young people are traveling, while elderly like staying at home in the
evening. Close to 60 per cent does not have a car and thus depends on public transport.
Another 37% only has one car. Because the share of 2-3 persons household is 46%, the
sample includes a substantial share of car-deficient households. In fact, cross-tabulation
shows these households represent 25% per cent of the sample. Close to 20 per cent of
the sample has an income larger than 8000 RMB/month.
Chapter 4
64
Table 4-6 Socio-demographic characteristics of the respondents (N = 715 respondents)
Socio-demographic characteristics Sample Percentages
Age
<18 7 1%
18 - 24 229 32%
25 - 34 346 48%
35 - 44 81 11%
45 - 54 41 6%
>=55 11 2%
Gender
Female 406 57%
Male 309 43%
Household size
1 person 180 25%
2 - 3 persons 326 46%
More than 3 persons 209 29%
Household income (RMB/month)
Less than 4000 289 40%
4000 – 8000 284 40%
More than 8000 142 20%
Household car ownership
No car 428 60%
One car 263 37%
More than one car 24 3%
4.4.4 Model formulation
Combining the general principles which we discussed and the specific data that we
collected, we estimated three regression models with random effects to account for the
fact that one respondent may have provided several satisfaction ratings. First, we
estimated a linear regression model (Model 1) with access time, waiting time, in vehicle
time, egress time and travel cost for a trip stage, plus socio-demographic variables (Eq.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
65
10) as explanatory variables. This model is the benchmark model in the sense that it best
represents a common approach in transportation research. Second, we estimated the
same regression model (Model 2) but added mood, personality traits, attitudes and
perceived service quality (Eq. 4.11). Third, we estimated a regression model (Model 3)
using the cubic polynomial function of the differences between expected and experienced
values for access time, in vehicle time and egress time, a linear function of the difference
between expected and experienced values for waiting time, a categorical variable of travel
costs for a trip stage, plus a series of socio-demographic characteristics, attitudes, service
quality, moods and personality traits (Eq. 4.12). After removing some non-significant
variables, the satisfaction functions were specified as follows, where D is the difference
between expectation and experience:
4.10
𝑆𝑖𝑛𝑡 = 𝐶𝑜𝑛𝑠𝑡𝑎𝑛𝑡 + 𝛿T𝑎𝑐𝑐𝑒𝑠𝑠,𝑖𝑡 + 휁T𝑤𝑎𝑖𝑡𝑖𝑛𝑔,𝑖𝑡 + 𝜇T𝑖𝑛−𝑣𝑒ℎ𝑖𝑐𝑙𝑒,𝑖𝑡 + 휂T𝑒𝑔𝑟𝑒𝑠𝑠,𝑖𝑡 + 𝜏𝐶𝑜𝑠𝑡𝑖𝑡 +
𝜃𝑑𝐷emographic𝑛𝑡 +휀𝑖𝑡 + 𝑢𝑖
𝑆𝑖𝑛𝑡 = 𝐶𝑜𝑛𝑠𝑡𝑎𝑛𝑡 + 𝛿T𝑎𝑐𝑐𝑒𝑠𝑠,𝑖𝑡 + 휁T𝑤𝑎𝑖𝑡𝑖𝑛𝑔,𝑖𝑡 + 𝜇T𝑖𝑛−𝑣𝑒ℎ𝑖𝑐𝑙𝑒,𝑖𝑡 + 휂T𝑒𝑔𝑟𝑒𝑠𝑠,𝑖𝑡 + 𝜏𝐶𝑜𝑠𝑡𝑖𝑡 +
휃𝑑𝐷𝑒𝑚𝑜𝑔𝑟𝑎𝑝ℎ𝑖𝑐𝑛𝑡 + 𝜓𝑚𝑀𝑜𝑜𝑑𝑛𝑡 + 𝜔𝑝𝑃𝑒𝑟𝑠𝑜𝑛𝑎𝑙𝑖𝑡𝑦𝑛𝑡 + 𝜆𝑎𝐴𝑡𝑡𝑖𝑡𝑢𝑑𝑒𝑛𝑡 + 𝜑𝑞𝑆𝑒𝑟𝑣𝑖𝑐𝑒𝑛𝑡 +
휀𝑖𝑡 + 𝑢𝑖 4.11
𝑆𝑖𝑛𝑡 = 𝐶𝑜𝑛𝑠𝑡𝑎𝑛𝑡 + 𝛼1 𝐷𝑎𝑐𝑐𝑒𝑠𝑠,𝑖𝑡3 + 𝛽1𝐷𝑎𝑐𝑐𝑒𝑠𝑠,𝑖𝑡
2 + 𝛾1𝐷𝑎𝑐𝑐𝑒𝑠𝑠,𝑖𝑡 + 𝛼2 𝐷𝑤𝑎𝑖𝑡𝑖𝑛𝑔,𝑖𝑡3 +
𝛽2𝐷𝑤𝑎𝑖𝑡𝑖𝑛𝑔,𝑖𝑡2 + 𝛾2𝐷𝑤𝑎𝑖𝑡𝑖𝑛𝑔,𝑖𝑡 + 𝛼3𝐷𝑖𝑛−𝑣𝑒ℎ𝑖𝑐𝑙𝑒,𝑖𝑡
3 + 𝛽3𝐷𝑖𝑛−𝑣𝑒ℎ𝑖𝑐𝑙𝑒,𝑖𝑡2 + 𝛾3𝐷𝑖𝑛−𝑣𝑒ℎ𝑖𝑐𝑙𝑒,𝑖𝑡 +
𝛼4𝐷𝑒𝑔𝑟𝑒𝑠𝑠,𝑖𝑡3 + 𝛽4𝐷𝑒𝑔𝑟𝑒𝑠𝑠,𝑖𝑡
2 + 𝛾4𝐷𝑒𝑔𝑟𝑒𝑠𝑠,𝑖𝑡 + 𝜏𝐶𝑜𝑠𝑡𝑖𝑡 + 휃𝑑𝐷𝑒𝑚𝑜𝑔𝑟𝑎𝑝ℎ𝑖𝑐𝑛𝑡 + 𝜓𝑚𝑀𝑜𝑜𝑑𝑛𝑡 +
𝜔𝑝𝑃𝑒𝑟𝑠𝑜𝑛𝑎𝑙𝑖𝑡𝑦𝑛𝑡 + 𝜆𝑎𝐴𝑡𝑡𝑖𝑡𝑢𝑑𝑒𝑛𝑡 + 𝜑𝑞𝑆𝑒𝑟𝑣𝑖𝑐𝑒𝑛𝑡 + 휀𝑖𝑡 + 𝑢𝑖 4.12
where,
Daccess,it is the difference between expected and experienced access time for trip stage t
of individual i;
Dwaiting,it is the differences between expected and experienced waiting time for trip stage
t of individual i;
Din-vehicle,it is the differences between expected and experienced in-vehicle time for trip
stage t of individual i;
Degress,it is the differences between expected and experienced egress time for trip stage t
of individual i;
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66
Costit is the experienced cost for trip stage t of individual i;
αk is the coefficient of cubic term of attribute differences;
βk is the coefficient of square term of attribute differences;
γk is the coefficient of single term of attribute differences;
𝜏 is the coefficient of travel cost;
휃𝑑 is the coefficient of socio-demographic variables;
𝜓𝑚 is the coefficient of mood;
𝜔𝑝 is the coefficient of personality traits;
𝜆𝑎 is the coefficient of attitude;
𝜑𝑞 is the coefficient of service quality.
Random effect versions of the models were estimated.
4.4.5 Model estimation
Table 4-7 shows the estimated coefficients of the regression models. According to the
goodness of fit index, the r-squared of model 3 is highest, followed by model 2. Model 1
has the lowest r-squared. It implies that the proposed reference-based polynomial model
using differences between expectations and experiences is better than the commonly
applied linear regression, only using experienced values. It also shows that adding
attitudes, perceived service quality, moods and personality traits improves the goodness-
of-fit of the model.
Results of model 3 show that the difference between expected and experienced
waiting time is significant at the 0.01 level (γ2 = 0.04637, p = 0.0000). The cubic,
quadratic and single term of the difference between expected and experienced in-vehicle
time are significant (α3 = 0.00008, p = 0.1332; β3 = 0.00407, p = 0.1451; γ3 = 0.07144,
p = 0.0078). It implies that people are more sensitive to deviations from their
expectations for waiting time and in-vehicle time than access time and egress time when
they rate their satisfaction levels. Travel cost is significant at the 0.01 level (τ = 0.17806,
p = 0.0059). As the cost of public transport stage in Xi’an reflects differences in comfort
of public transport services, satisfaction is higher when travel costs are higher.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
67
Table 4-7 Regression results: trip stage satisfaction (Groups: 715; PT trip stages: 1402; Average group size: 2)
Model 1 Model 2 Model 3
Variable Estimate P Estimate P-
value Estimate P
Constant C 6.83895*** 0.0000 3.75917*** 0.0000 3.72196*** 0.0000
Trip attributes
Daccess3 α1 -- -- -- -- 0.00064 0.3928
Daccess2 β1 -- -- -- -- 0.00457 0.7539
Daccess γ1 -- -- -- -- -0.02252 0.7369
Dwaiting γ2 -- -- -- -- 0.04637*** 0.0000
Din-vehicle3 α3 -- -- -- -- 0.00008* 0.1332
Din-vehicle2 β3 -- -- -- -- 0.00407* 0.1451
Din-vehicle γ3 -- -- -- -- 0.07144*** 0.0078
Degress3 α4 -- -- -- -- 0.00009 0.5352
Degress2 β4 -- -- -- -- 0.00160 0.5688
Degress γ4 -- -- -- -- 0.02044 0.3792
Experienced
access time δ -0.00340 0.7038 0.00049 0.9560 -- --
Experienced
waiting time ζ -0.04358*** 0.0000 -0.03846*** 0.0000 -- --
Experienced
in-vehicle
time
μ -0.00746** 0.0434 -0.00851** 0.0187 -- --
Experienced
egress time η -0.00340 0.7040 -0.00188 0.8304 -- --
Experienced
cost τ 0.18911*** 0.0056 0.19574*** 0.0036 0.17806*** 0.0059
Social-demographic variables
Age 휃1 0.00979 0.2270 0.00953 0.2203 0.00880 0.2563
Gender 휃2 0.09684 0.1576 0.10318 0.1060 0.11125* 0.0804
Household
size1 휃3 -0.05849 0.6110 -0.08009 0.4526 -0.05630 0.5967
Household
size2 휃4 -0.03536 0.7121 -0.09803 0.2674 -0.10398 0.2388
#Household
car (no car) 휃5 0.13445 0.3510 0.25090* 0.0727 0.27071* 0.0514
#Household
car (one car) 휃6 0.12929 0.3811 0.23941* 0.0780 0.28869** 0.0331
Household
income 휃7 -0.10728 0.3038 0.01296 0.8943 0.04103 0.6735
Chapter 4
68
Model 1 Model 2 Model 3
Variable Estimate P Estimate P-
value Estimate P
Constant C 6.83895*** 0.0000 3.75917*** 0.0000 3.72196*** 0.0000
Household
income 휃8 0.08834 0.3528 0.09641 0.2714 0.08997 0.3035
Mood
Enjoyment 𝜓1 -- -- 0.08023** 0.0296 0.08154** 0.0266
Relax 𝜓2 -- -- -0.00267 0.9421 -0.00173 0.9622
Worry 𝜓3 -- -- 0.02656 0.5137 0.01351 0.7395
Sad 𝜓4 -- -- -0.02848 0.4899 -0.01916 0.6415
Happy 𝜓5 -- -- 0.05547* 0.0769 0.05570* 0.0755
Depress 𝜓6 -- -- 0.04624 0.3008 0.06330 0.1569
Anger 𝜓7 -- -- -0.09848** 0.0108 -0.08874** 0.0212
Stress 𝜓8 -- -- -0.01328 0.6947 -0.01825 0.5887
Tired 𝜓9 -- -- 0.02841 0.3216 0.02718 0.3410
Personality
Critical 𝜔1 -- -- 0.03047 0.2640 0.02749 0.3124
Self-
disciplined 𝜔2 -- -- -0.08110** 0.0117 -0.08330*** 0.0094
Impatient 𝜔3 -- -- -0.00222 0.9374 -0.00895 0.7507
Reserved 𝜔4 -- -- -0.00743 0.7926 0.00350 0.9012
Easy-going 𝜔5 -- -- 0.05430* 0.0734 0.05997** 0.0474
Calm 𝜔6 -- -- 0.04690 0.1911 0.04259 0.2341
Attitude
Environment
concern 𝜆1 -- -- -0.01060 0.8802 -0.00362 0.9589
Loyal user of
public
transport
𝜆2 -- -- 0.15108* 0.0597 0.15967** 0.0458
Loyal user of
car 𝜆3 -- -- 0.12534 0.1463 0.12682 0.1412
Satisfaction of service quality
Frequency 𝜑1 -- -- 0.06669 0.1362 0.05862 0.1902
Punctuality 𝜑2 -- -- 0.02379 0.5868 0.02723 0.5317
Accessibility 𝜑3 -- -- -0.04525 0.2745 -0.05481 0.1868
Number of
transfer 𝜑4 -- -- -0.03253 0.4521 -0.04251 0.3240
Transfer
time 𝜑5 -- -- 0.01191 0.7973 0.02482 0.5911
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
69
Model 1 Model 2 Model 3
Variable Estimate P Estimate P-
value Estimate P
Constant C 6.83895*** 0.0000 3.75917*** 0.0000 3.72196*** 0.0000
In-vehicle
time 𝜑6 -- -- 0.02952 0.4754 0.00681 0.8692
Price 𝜑7 -- -- 0.06347** 0.0492 0.06797** 0.0346
Seat
availability 𝜑8 -- -- 0.16603*** 0.0000 0.15616*** 0.0000
Station
environment 𝜑9 -- -- -0.04096 0.3152 -0.02570 0.5274
In-vehicle
environment 𝜑10 -- -- 0.09625** 0.0220 0.09808** 0.0191
Information 𝜑11 -- -- -0.07793* 0.0518 -0.06516 0.1034
Driver skill 𝜑12 -- -- 0.02496 0.5066 0.01264 0.7358
Safety 𝜑13 -- -- 0.04298 0.2139 0.04390 0.2039
Night service 𝜑14 -- -- -0.01251 0.6894 -0.00877 0.7785
Random effects model: v(i, t) = e(i, t) + u(i)
Var[e] 1.15635 1.21087 1.14652
Var[u] 2.49671 1.89505 1.88737
Corr[v(i, t),
v(i, s)] 0.68346 0.60762 0.62210
Sum of
Squares 5089.95732 4200.63663 4139.07658
R2 0.04054 0.20751 0.21916
Adjusted R2 0.03129 0.18168 0.19009
Note: ***, **, * ==> Significance at 1%, 5%, 10% level.
Moreover, we estimated the effects of socio-demographic variables, attitudes,
perceived service quality, mood and personality traits. In model 3, results show that
gender effects are significant at the 0.1 level (휃2 = 0.11125, p = 0.0804). It implies that
the satisfaction ratings for public transport trip stages of men are higher than those of
women. Households’ car ownership has significant effects on trip stage satisfaction. The
satisfaction ratings of people who live in households owning less than two cars are
substantially higher than the average. Feeling enjoyment, happy mood and anger mood
have significant effects on trip stage satisfaction. Coefficients show that feeling enjoyment
and happy have positive influences on trip stage satisfaction (𝜓1 = 0.08154, p = 0.0266;
𝜓5 = 0.05570, p = 0.0755). Anger has a negative influence on trip stage satisfaction (𝜓7
= -0.08874, p =0.0212).
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70
Table 4-8 Key points of the polynomial function
Root D1 Root D2 Root D3 Critical point D4 Critical point D5 Inflection point D6
Function: 𝑺 = 𝟎. 𝟎𝟎𝟎𝟔𝟒𝑫𝒂𝒄𝒄𝒆𝒔𝒔𝟑 + 𝟎. 𝟎𝟎𝟒𝟓𝟕𝑫𝒂𝒄𝒄𝒆𝒔𝒔
𝟐 − 𝟎. 𝟎𝟐𝟐𝟓𝟐𝑫𝒂𝒄𝒄𝒆𝒔𝒔 + 𝟑. 𝟕𝟐𝟏𝟗𝟔
-21.4370 +
0.0000i
7.1482 +
14.8388i
7.1482 -
14.8388i -6.5509 1.7905 -2.3802
Function: 𝑺 = −𝟎. 𝟎𝟎𝟎𝟎𝟖𝑫𝒊𝒏−𝒗𝒆𝒉𝒊𝒄𝒍𝒆𝟑 + 𝟎. 𝟎𝟎𝟒𝟎𝟕𝑫𝒊𝒏−𝒗𝒆𝒉𝒊𝒄𝒍𝒆
𝟐 + 𝟎. 𝟎𝟕𝟏𝟒𝟒𝑫𝒊𝒏−𝒗𝒆𝒉𝒊𝒄𝒍𝒆 + 𝟑. 𝟕𝟐𝟏𝟗𝟔
-51.1862 +
0.0000i
0.1556 +
30.1480i
0.1556 -
30.1480i -16.9583 + 3.1752i -16.9583 - 3.1752i -16.9583
Function: 𝑺 = 𝟎. 𝟎𝟎𝟎𝟎𝟗𝑫𝒆𝒈𝒓𝒆𝒔𝒔𝟑 + 𝟎. 𝟎𝟎𝟏𝟔𝟎𝑫𝒆𝒈𝒓𝒆𝒔𝒔
𝟐 + 𝟎. 𝟎𝟐𝟎𝟒𝟒𝑫𝒆𝒈𝒓𝒆𝒔𝒔 + 𝟑. 𝟕𝟐𝟏𝟗𝟔
-39.0642 +
0.0000i
10.6432 +
30.7468i
10.6432 -
30.7468i -5.9259 + 6.3708i -5.9259 - 6.3708i -5.9259
Figure 4-3The linear function of the difference between expected and experienced access time
Personality traits are also shown to affect trip stage satisfaction. The self-
disciplined personality trait has a negative effect on trip stage satisfaction (𝜔2 = -0.08330,
p = 0.0094). The Easy-going personality trait has a positive effect on trip stage
satisfaction (𝜔5 = 0.05997, p = 0.0474). Being loyal to using public transport has a
positive effect on trip stage satisfaction (𝜆2= 0.15967, p = 0.0458). Results show that
service quality variables including price, seat availability, and in-vehicle environment have
positive effects on trip stage satisfaction (𝜑7 = 0.06797, p = 0.0346; 𝜑8 = 0.15616, p =
0.0000; 𝜑7 = 0.09808, p = 0.0191).
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
-20 -15 -10 -5 0 5
S
Daccess = Expected access time - Experienced access timeD4 D6
S = 0.00064𝐷𝑒𝑔𝑟𝑒𝑠𝑠^3 + 0.00457𝐷𝑒𝑔𝑟𝑒𝑠𝑠^2 - 0..02252𝐷𝑒𝑔𝑟𝑒𝑠𝑠 + 3.72196
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
71
Figure 4-4The linear function of the difference between expected and experienced waiting time
4.4.6 Effects of trip attribute discrepancies and indifference tolerance
Based on the estimated coefficients, we draw the graphs of the satisfaction function to
show the effects of the discrepancy between expected and experienced trip attributes
access time, waiting time, in-vehicle time, and egress time on trip stage satisfaction
(Figure 4.2 – Figure 4.5). Waiting time is linear, the others are all cubic functions. In order
to better understand the properties of the estimated cubic function and formally interpret
the function, the three roots, critical points and inflection point were derived (Table 4-8).
Figure 4-3 graphs the estimated cubic function for access time. The cubic function
has the form S = 0.00064*𝐷𝑎𝑐𝑐𝑒𝑠𝑠^3 + 0.00457*𝐷𝑎𝑐𝑐𝑒𝑠𝑠^2 + 0.02252*𝐷𝑎𝑐𝑐𝑒𝑠𝑠 +
3.72196. The first derivative of the estimated equation gives us two critical points (D4 =
-6.55, D5 = 1.79). The second derivative of the estimated function gives the inflection
point (D6 = -2.38). According to Figure 4-3, the curvature of this function changes slowly,
implying that satisfaction ratings are not very sensitive to the difference between
expected and experienced access time. This may be interpreted as that respondents are
indifferent if the experienced access time is less than 6.55 minutes longer than the
expected access time. When the gap between experienced access time and expectation
is longer than 6.55 minutes, the satisfaction decreases rapidly.
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
-35 -30 -25 -20 -15 -10 -5 0 5
S
Dwaiting = Expected waiting time - Experienced waiting time
S = 0.04637𝐷waiting + 3.72196
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72
Figure 4-5 The cubic function of the difference between expected and experienced in-vehicle time
Figure 4-6 The cubic function of the difference between expected and experienced egress time
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
-50 -40 -30 -20 -10 0 10
S
Din-vehicle = Expected in-vehicle time - Experienced in-vehicle time
D6
S = 0.00008 𝐷𝑖𝑛−𝑣𝑒ℎ𝑖𝑐𝑙𝑒^3 + 0.00407𝐷𝑖𝑛−𝑣𝑒ℎ𝑖𝑐𝑙𝑒^2 + 0.07144𝐷𝑖𝑛−𝑣𝑒ℎ𝑖𝑐𝑙𝑒 + 3.72196
0.00
0.50
1.00
1.50
2.00
2.50
3.00
3.50
4.00
4.50
5.00
-25 -20 -15 -10 -5 0 5 10 15 20
S
Degress = Expected egress time - Experienced egress time
D6
S = 0.00009 𝐷𝑒𝑔𝑟𝑒𝑠𝑠^3 + 0.00160𝐷𝑒𝑔𝑟𝑒𝑠𝑠^2 + 0.02044𝐷𝑒𝑔𝑟𝑒𝑠𝑠 + 3.72196
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
73
Figure 4-4 graphs the estimated function for difference between expected and
experienced waiting time. The estimated satisfaction function has the form S =
0.04637𝐷𝑤𝑎𝑖𝑡𝑖𝑛𝑔 + 3.72196. As can be seen in Figure 4-4, the function is linear, implying
that satisfaction increases with decreasing difference between experienced and expected
waiting time (when experienced waiting time is larger than expected waiting time). The
estimated function does not suggest any indifference threshold.
Figure 4-5 graphs the estimated satisfaction function for the difference between
expected and experienced in-vehicle time. The cubic function has the form S = 0.00008
𝐷𝑖𝑛−𝑣𝑒ℎ𝑖𝑐𝑙𝑒^3 + 0.00407𝐷𝑖𝑛−𝑣𝑒ℎ𝑖𝑐𝑙𝑒^2 + 0.07144𝐷𝑖𝑛−𝑣𝑒ℎ𝑖𝑐𝑙𝑒 + 3.72196. The first
derivative of the estimated equation gives us the two critical points, which are
unobservable, while taking the second derivative gives the inflection point (D6 = -16.96).
As can be seen in Figure 4-5, the function is concave between -40 and -16.96 minutes
discrepancy and convex between -16.96 and 5 minutes. There is no evidence of tolerance
for this function. As can be seen in most cases the experienced in-vehicle time is higher
than the expectation. The closer the two values become, the higher the satisfaction.
Figure 4-6 graphs the estimated function for the difference between expected and
experienced egress time. The estimated function reads S = 0.00009 𝐷𝑒𝑔𝑟𝑒𝑠𝑠^3 +
0.00160𝐷𝑒𝑔𝑟𝑒𝑠𝑠^2 + 0.02044𝐷𝑒𝑔𝑟𝑒𝑠𝑠 + 5.74736. The first derivative of the estimated
equation gives us the two critical points, which are unobservable, while taking the second
derivative gives the inflection point (D6 = -5.93). According to the inflection point, the
function is concave between -20 and -5.93 minutes discrepancy and convex between -
5.93 and 15 minutes. There is no evidence of tolerance for this function. The effect of
differences between expected and experienced egress time on trip stage satisfaction is
positive for the majority of cases where experienced egress time is larger than expected
egress time. It can be concluded that the closer the experienced egress time is to the
expected egress time, the more satisfied respondents are.
4.5 Conclusion
In this chapter, we developed separate models to estimate the effects of objective and
subjective factors on travel stage satisfaction. One of the main aims of this study is to
understand how satisfaction is related to attributes of trips and transport modes.
Techniques such as linear regression analysis and structural equations modeling provide
insight into the strength of the effects of such attributes on satisfaction, which is relevant
information for managers and policy makers. This reasoning, however, assumes that the
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74
estimated relationship is not confounded by any omitted variables. This paper is
motivated by the contention that results of most prior research may be biased because
they ignored measuring subjective factors such as mood and personality traits that both
influenced ratings of travel satisfaction.
First, this study examined this issue through a path analysis based on cross-
sectional survey data collected in China in 2015. The main findings of this study suggest
that moods such as feeing happy and relaxed lead to higher travel satisfaction while a
bad mood such as anger leads to a lower travel satisfaction. By including the effect of
trip attributes in the same model, results indicate that travel satisfaction is not only
affected by objective elements such as trip attributes, but also by subjective factors such
as mood. This finding suggests that results of the effect of trip attributes on travel
satisfaction may be biased when researchers ignore the effect of mood. Personality has
both direct and indirect significant effect on travel satisfaction. Personality traits such as
being critical and easy-going have a direct effect on travel satisfaction. Being critical and
easy-going leads to high satisfaction. Personality has a direct effect on mood. Therefore,
mood is also a mediator of personality and travel satisfaction.
Regarding the relationship between trip attributes and travel satisfaction, as we
specify the effect of mood and personality simultaneously with trip attributes in the model,
the effect of trip attributes can be estimated more purely. The use of public transport has
a negative effect on travel satisfaction. How to encourage people to use public transport
considering that people have a lower satisfaction when using public transport becomes
an essential issue to be discussed by policy makers. Therefore, service quality such as
accessibility, punctuality, frequency and environment needs to be improved. Moreover,
the waiting time negatively affects travel satisfaction, suggesting that using smartphones
to get real time information may reduce waiting time to encourage people to use public
transport. This requires the improvement of information systems and in-vehicle wireless
technology. Results found that trip attributes can affect mood, which in turn affects travel
satisfaction. The results showed significant effects of age and gender on travel
satisfaction, mood and personality. Older people are found to be more satisfied in general
with their travel experience, and more likely feel relaxed, are self-disciplined and reserved.
Younger people are more easy-going. Men are more likely feel anger and are critical.
This analysis has provided empirical evidence that personality traits and moods
influence travel satisfaction. Omitting these factors in analyzes of travel satisfaction which
aim at estimating to the contribution of travel attributes to travel satisfaction may lead to
biased effects, which in turn may lead to misguided recommendations to managers and
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
75
policy makers to improve consumer satisfaction. It is therefore recommended to include
personality traits and moods in cross-sectional studies of travel satisfaction. Omitting
these variables in monitoring studies may be less problematic if it can be validly assumed
that the effect of personality and mood on travel satisfaction is invariant across time.
Second, a reference-based polynomial regression approach was used to
construct the model of trip stage satisfaction incorporating trip attributes, perceived
service quality, psychological disposition and indifference tolerance. Whereas in many
other disciplines customer satisfaction has been conceptualised as a function of the gap
between expected and experienced service delivery, travel satisfaction in transportation
research has been predominantly measured as a function of objective or subjective
attribute levels. Therefore, the another aim of this study has been to examine the
performance of models of travel satisfaction that include this discrepancy versus models
that do not. Furthermore, because different attribute potentially play a different role in
judging satisfaction, we allow non-linear relationships between the difference between
expected and experienced attributes and satisfaction. In this chapter, we built a model of
the impact of differences between expected and experienced trip attributes on trip stages
satisfaction using polynomial regression models, controlling for perceived service quality,
attitudes, moods, personality traits and socio-demographic characteristics of respondents.
We find that the difference between expected and experienced waiting time, in-
vehicle time, experienced cost, perceived service quality, attitude, mood, personality and
socio-demographic characteristics have significant effects on trip stage satisfaction. In
addition, adding perceived service quality, attitudes, moods and personality traits
improves the goodness of fit of the model. Results show that loyalty to public transport,
price, seat availability, in-vehicle environment, enjoyment mood, happy mood, and easy-
going personality lead to higher ratings of trip stage satisfaction. An angry mood and self-
disciplined personality have negative effects on satisfaction. We also found that
satisfaction ratings of men are higher than satisfaction ratings of women. This result is at
variance with findings of some previous studies of trip satisfaction, which found that
gender has no significant effect on satisfaction with public transport services (De Vos et
al., 2016, Carrel et al., 2016). Household car ownership has significant effects on trip
stage satisfaction. The satisfaction ratings of people who live in households owning less
than one car are substantially higher than the average. Unlike previous studies, we
explored the existence of a tolerance range in the discrepancy between expected and
experienced attributes. Findings indicate that respondents tolerate small differences in
access time.
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76
The contributions of this analysis are 1) we include customer expectations in the
analysis of travel satisfaction, controlling for perceived service quality, attitude, mood,
personality traits and socio-demographic characteristics; 2) we applied a polynomial
regression model to avoid making a priori assumptions about the form of the satisfaction
function; 3) we investigated the existence of a tolerance range reflecting people’s
sensitivity to gaps between experiences and expectations when evaluating their travel
experience. Results support the potential value of incorporating these ideas into travel
satisfaction analyzes. The major advantage of using the polynomial form is that the
researcher does not need to a priori decide on the form of the satisfaction function.
Linearity/non-linearity, convexity/concavity and tolerance are now the result of the
estimated cubic function. It should be mentioned in this context that of course there is
always an element of personal judgment and interpretation of the result.
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
77
5
PREVALENCE OF ALTERNATIVE
PROCESSING RULES IN THE FORMATION OF
DAILY TRAVEL SATISFACTION IN
DIFFERENT CONTEXT
5.1 Introduction
The study of travel satisfaction has rapidly increased in popularity in recent years. In part,
this increasing popularity reflects a response to the growing importance of quality of life,
subjective well-being, happiness and similar concepts in urban policies. Transportation
researchers have jumped on the bandwagon with the desire to make a contribution to
this emerging line of research, focusing on transportation and travel. Consequently, the
body of knowledge about the determinants and co-variates of travel satisfaction has
rapidly increased. In addition, methodological advances related to the construction and
validation of travel satisfaction scales have been made (Ettema et al., 2011).
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78
Examples of such studies include Abou-Zeid and Ben-Akiva (2011), Abou-Zeid and
Fujii (2016), Archer et al. (2013), Currie et al. (2009), Ettema et al. (2010), Ravulaparthy
et al. (2013), Spinney et al. (2009), to name a few. A review of this line of research can
be found in De Vos et al. (2013). Results of these studies have provided mixed evidence
about the contribution of travel satisfaction to assessments of quality of life. It seems that
travel satisfaction contributes marginally to subjective well-being; the reverse relationship
seems stronger in the sense that subjective well-being more strongly affects travel
satisfaction ratings.
A second motivation underlying the study of travel satisfaction is to better
understand service provision, particularly of public transportation. To limit the growth in
car use, a competitive public transportation system is of utmost importance. An
understanding of customer satisfaction and its determinants is highly instrumental in
optimizing service delivery and stimulating travelers to use public transportation.
Examples of such studies include Abenoza et al. (2017), Cao (2013), de Oña et al. (2013),
De Vos et al. (2016), Dell’Olio et al. (2010, 2011), Del Castillo and Benitez (2012, 2013),
Diana (2012), Eboli and Mazzulla (2007, 2008, 2010, 2011, 2012), Edvardsson (1998),
Ettema et al. (2012), Fellesson and Friman (2008), Friman and Fellesson (2009), Lai and
Chen (2010), Sumaedi et al. (2012), Vicente and Reis (2016) and Wu et al. (2016). Such
studies provide information about the relative importance of different trip and vehicle
attributes on customer satisfaction.
Regardless of the theoretical and policy orientations of these studies on travel
satisfaction, respondents are prompted to express their degree of satisfaction with their
daily travel experiences. Some studies have relied on simple rating scales, others have
adopted more sophisticated multi-item travel satisfaction instruments (e.g., Bergstad et
al., 2011; Ettema et al., 2011). Recently, smart phones have been used to measure
satisfaction instantaneously (experience sampling) (Susilo et al., 2017), but the vast
majority of the studies on travel satisfaction has relied on memory recall. To provide these
overall or summary satisfaction ratings, respondents need to retrieve and re-enact their
trips from memory, recall cognitive and affective aspects associated with their
experiences, process their evaluations of all attributes of the trip influencing their
satisfaction according to some processing rule and, finally, and finally express their degree
of satisfaction on the rating scale or in terms of the multi-item satisfaction instrument.
Reflecting on the sequence of events during a multi-stage trip, they need to process their
assessment of the bus stop environment, waiting time, on-time arrival, boarding, the
friendliness of the driver, ticket price, seat availability and quality, cleanness of the
vehicles, driving style of the driver, possible incidents during the trip, the alighting process,
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
79
and this is repeated for every stage of the trip, and for every trip on the day of interest.
Moreover, to further complicate matters, previous research has shown that multi-tasking
i.e. the activities conducted when traveling affect trip satisfaction (Ettema et al., 2012),
and that in addition the kind of activity conducted before and after the trip influences
travel satisfaction (Rasouli and Timmermans, 2014).
An interesting and relevant research question then is which processing rule best
captures this process of articulation of travel satisfaction. Do travelers simply average
their satisfaction across trips or trip segments? Or, do they put higher weight on more
recent experiences? Rather than averaging, do they base their overall daily travel ratings
on the best experience they had, or maybe on their worse experience? Do they apply
some combination of these rules? It goes without saying that this research question has
direct theoretical relevance because it provides insight into complex cognitive processes.
The question also has applied relevance because the answer to this question may indicate
how researchers best analyze travel satisfaction data, while the implications for
practitioners in the context of attracting loyal customers who are satisfied with the service
delivery depend on the processing rule that best represents traveler satisfaction.
An examination of the literature reveals that this research question did not receive
much attention in transportation research. The only study in transportation research we
could trace is Suzuki et al. (2014). The theoretical orientation of this study suggests the
authors were inspired by Kahneman (2000) as they did not take a wider perspective. In
several domains other than travel satisfaction, it has been found that summary
judgements of sequences tend to be a function of the satisfaction with the peak
experience (the experience with the largest satisfaction difference with the average
satisfaction) and the last experience. Suzuki et al. (2014) compared this so-called peak
and end rule (Kahneman, 2000) with summation, averaging and weighted duration rules.
As said, the peak-end rule contends that the satisfaction of an event sequence
corresponds to the average of the satisfaction with the peak experience in the sequence
and the satisfaction with the experience of the end of the sequence. The summing rule
in contrast suggests that overall satisfaction equals the sum of the satisfaction of each
stage/event in the sequence. The equal weight averaging rule divides this total by the
number of stages. The duration weighted averaging rule is similar but weighs each stage
by its duration. In case of an equal number of stages of equal length, the latter two rules
are identical.
In light of the scant attention to this research question, the aim of our study is to
compare the predictive performance of different processing rules that represent how
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80
travelers arrive at overall travel satisfaction ratings. Rather than focusing specifically on
the theoretical foundations underlying this prior research, we take a broader perspective
and also consider rules that are founded on other theories. Using data on travel
satisfaction collected in Xian, China, we examine a set of processing rules that differ in
terms of the nature of the underlying decision process and allow investigating recency
effects. In order to more clearly communicate the importance of the different explanatory
variables, we first estimated models with satisfaction only. Then, assuming that
personality and mood may systematically affect travel satisfaction ratings, we added
mood and personality traits to the equation. Finally, because unobserved heterogeneity
may be present, we estimated random parameters regression models. This series of
analyzes is repeated twice, once to analyze how satisfactions about trip stages are
processed to arrival at the satisfaction for the overall trip, and once to analyze how trip
satisfactions are processed to generate overall satisfaction with a day’s travel.
In the remainder of this chapter, we first introduce and discuss the various
processing rules that we investigate. Next, we provide details of sample characteristics.
This is followed by the discussion of the analyzes and their results. We complete this
chapter by drawing conclusions and highlighting implications for travel satisfaction
research and management of public transport systems.
5.2 Processing rules
Let 𝑖𝑛 = {𝑖𝑛(𝑗) ∈ 𝐼𝑛}; 𝐼𝑛 > 0; 𝑗 = 1, … , 𝐽 be the sequence of chronologically ordered
daily trips individual n makes. Each trip i consists of a sequence of one or more trip stages
j. Associated with each stage is a set of K attributes affecting trip satisfaction. Let 𝑆𝑛𝑖(𝑗)𝑘
denote the satisfaction of individual n with attribute k characterizing stage j of trip i. In
order to arrive at trip stage satisfaction, individuals need to process and integrate these
attribute-level satisfactions into a summary satisfaction rating according to some
processing rule. That is,
𝑆𝑛𝑖(𝑗) = 𝑓𝑛𝑘(𝑆𝑛𝑖(𝑗)𝑘) 5.1
where 𝑓𝑛𝑘 is the processing rule that individual n applies to the attributes.
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This equation describes the functional form of the satisfaction. We mention it here
for completeness, but do not further discuss it in this chapter. Our study is concerned
with the following phases.
Similarly, the segment level summary satisfactions need to be integrated to arrive
at the satisfaction for the full trip. That is,
𝑆𝑛𝑖 = 𝑓𝑗′(𝑆𝑛𝑖(𝑗)) 5.2
Finally, if overall satisfaction with a full day’s travel is solicited, individuals have to
process their trip satisfaction and combine these into an overall travel satisfaction rating
for the full day. That is,
𝑆𝑛 = 𝑓𝑖′′(𝑆𝑛𝑖) 5.3
In order to answer our research questions, alternative processing rules need to be
specified. Starting with the rules tested in previous research, Kahneman’s (2000) peak
and end rule for trip satisfaction may be expressed as:
𝑆𝑛𝑖 = (𝑆𝑛𝑖(𝑗∗) + 𝑆𝑛𝑖(𝐽))/2 5.4
𝑗∗ = argmax𝑗(|𝑆𝑛𝑖(𝑗) − 𝑆�̅�𝑖(𝑗)|) 5.5
where 𝑆�̅�𝑖(𝑗) is the average satisfaction across the trip stages.
Note that this rule assumes that the elicited satisfaction rating equals the average
of the experiences that deviates most from the average (regardless of whether it is
positive or negative) and the satisfaction with most recent experience.
The summing rule for trip satisfaction assumes that
𝑆𝑛𝑖 = ∑ 𝑆𝑛𝑖(𝑗)𝐽𝑗=1 5.6
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while the averaging rule can be expressed as
𝑆𝑛𝑖 = ∑ 𝑆𝑛𝑖(𝑗)𝐽𝑗=1) /𝐽𝑖 5.7
Similarly, the duration weighted averaging rule equals
𝑆𝑛𝑖 = ∑ Δ𝑖(𝑗)𝑆𝑛𝑖(𝑗)𝐽𝑗=1 / ∑ Δ𝑖(𝑗)
𝐽𝑗=1 5.8
where Δ𝑖(𝑗) is the duration of stage j of trip i.
All previous models are special or limited cases of the linear additive processing
rule.
𝑆𝑛 = ∑ ∑ 𝑆𝑛𝑖(𝑗)𝐽𝑗
𝐼𝑛𝑖 5.9
This processing rule captures a compensatory decision-making process in which a
low satisfaction of an attribute of a stage can be at least partially be compensated by
high satisfactions with one or more other attributes or stages. Likewise, high satisfactions
can be reduced by low satisfactions on one or more other attributes or stages. Overall
satisfaction is a weighted sum of attribute satisfactions across trip stages. The model is
consistent with Anderson’s classical theory of information integration (Anderson, 1981).
Other processing rules allow the examination of non-compensatory decision-making
processes. The conjunctive processing rule assumes that overall satisfaction is based on
the minimum attribute satisfaction, while the disjunctive rule assumes that overall
satisfaction is based on the maximum attribute satisfaction, regardless of the satisfaction
ratings of the other attributes. These non-compensatory processing rules may adequately
capture the formation of satisfaction either when individuals attempt to simplify the
integration process by focusing on some satisfactions/attributes only or when the very
bad or very good experience dominates the assessment process. The first would be
indicative of bounded rationality (Rasouli and Timmermans, 2015).
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
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Figure 5-1 Conjunctive rule
Although these principles can be tested at the individual level, usually non-linear
approximations are used to present conjuctive and disjunctive processing rules. Einhorn
(1970, 1971) suggested non-linear approximations of the conjunctive and disjunctive
processing rules. The conjunctive rule can be approximated as:
𝑆𝑛 = ∏ ∏ 𝑆𝑛𝑖(𝑗)𝛽𝐽
𝑗𝐼𝑛𝑖 5.10
By taking the log, the following model is obtained
log 𝑆𝑛 = ∑ ∑ 𝛽 log 𝑆𝑛𝑖(𝑗)𝐽𝑗
𝐼𝑛𝑖 + 휀𝑛𝑖 5.11
Figure 5-1 provides a graphical representation of this processing rule. Note it
represents a parabolic curve, implying that low satisfaction values related to an attribute/
stage cannot be compensated by higher value on one or more of the other attributes/
stages.
A nonlinear approximation of the disjunctive model is given by
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Figure 5-2 Disjunctive rule
𝑆𝑛 = ∏ ∏ (1
𝛼𝑖(𝑗)−𝑆𝑛𝑖(𝑗))
𝛽𝐽𝑗
𝐼𝑛𝑖 5.12
By taking the log,
log 𝑆𝑛 = − ∑ ∑ 𝛽 log(𝛼𝑖(𝑗) − 𝑆𝑛𝑖(𝑗))𝐽𝑗
𝐼𝑛𝑖 + 휀𝑛𝑖 5.13
where 𝛼𝑖(𝑗) is a reference point, in our study the maximum score of satisfaction is 10,
the value 𝛼𝑖(𝑗) is set as 11.
Figure 5-2 graphs this processing rule. It shows the equation represents a
hyperbolic response curve.
5.3 Sample characteristics
Distributions of characteristics of the sample are shown in Figure 5-3. It shows that 46%
of the sample is between 25 and 35 years of age, and that 28% is between 18 and 25
years old. Only 3% of the sample is older than 55. This distribution shows the self-
selection in the use of public transport. It may be amplified by the fact that the survey
was conducted at the end of the day (evening) when the number of young people
travelling is larger than the number of respondents in other age groups.
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Figure 5-3 Sample characteristics (N = 1445)
Figure 5-3 also shows that 54% of the sample is female, while 46% is male. 31%
of the sample is living in households with more than 3 persons, while 23% is living alone.
Even though 73% of the sample has a professional education, 39% of the sample has
medium income level. More than half of the sample (51%) is employed full time (fixed
schedule).
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5.4 Analyzes and results
The aim of this study is to examine the predictive performance of alternate processing
rules that individuals may use to arrive at overall satisfaction ratings based on their
assessment of components of their travel. Our data allows exploring this research
question for two different decision problems: (i) how do individuals arrive at their
satisfaction ratings for trips based on their ratings of trips stages? (ii) how do individuals
arrive at their daily travel satisfaction ratings based on their evaluations of the trips? It
should be emphasized from the outset that the number of episodes that need to be
processed and integrated differs between the two problems. Because the complexity of
the trips we observed in our data set is limited, the number of stages was typically just
2. The number of episodes for a full day was mostly four.
Based on our theoretical considerations, in particular we will analyze the
prevalence of the distinguished processing rules and focus our attention on the existence
of any recency effects in the formation process. In a second, more elaborated analysis,
we investigate the effects of including selected socio-demographic attributes (age and
gender), a set of personality traits and mood.
5.4.1 Relationship between trip satisfaction and trip stage satisfaction
We first report the results of the analyzes concerned with the relationship between trip
satisfaction and trip stage satisfaction. As discussed, satisfaction was measured for whole
trip and for each stage including the access, waiting and transfer part. The last stage thus
includes egress. Consequently, the sequence length is relatively short.
5.4.1.1 Models with stage satisfactions only
Because we use Suzuki et al. (2014) as a benchmark, we first report the findings of the
processing rules they examined for our data set. We use pearson correlation analyzes to
estimate the performance of each processing rule. The results of pearson correlation
coefficients are listed in Table 5-1. It shows that the performance of the rules, measured
in terms of the pearson correlation coefficient does not differ much. The summation rule,
peak-end rule and equal-weight averaging rule show a slightly higher correlation than the
duration-weighted averaging rule. The duration-weighted rule performed best for Suzuki’s
data which is different from the results in our study. This difference may be caused by
the fact they explicitly differentiated between access and egress, which tends to take less
time. In our study, each stage has access and egress.
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Table 5-1 Correlation between peak-end, summation and weighted averaging rules and trip satisfaction
Processing Rule Peak-end
Rule
Summation
Rule
Equal-weight
Averaging Rule
Duration-weighted
Averaging Rule
Pearson Correlation
coefficient (r) 0.595*** 0.595*** 0.595*** 0.584***
r2 0.354 0.354 0.354 0.341
*** ==> Correlation is significant at the 1% level (2-tailed).
Table 5-2 Estimated resutls of conjunctive, disjunctive and linear processing rule for trip satisfaction with panel effects
Processing Rule Conjunctive Model Disjunctive Model Linear Model
Coefficient SE Coefficient SE Coefficient SE
Constant 0.253*** 0.052 1.058*** 0.037 2.387*** 0.422
β1 (Stage 1
Satisfaction) 0.450*** 0.058 0.292*** 0.054 0.400*** 0.060
β2 (Stage 2
Satisfaction) 0.226*** 0.054 0.156*** 0.052 0.224*** 0.058
Random effects model: v(i, t) = e(i, t) + u(i)
Var[e] 0.009 0.010 1.289
Var[u] 0.007 0.009 0.898
Corr[v(i, t), v(i, s)] 0.444 0.476 0.411
Sum of Squares 3.597 4.237 472.210
R2 0.388 0.279 0.353
Adjusted R2 0.382 0.272 0.347
***, **, * ==> Significant at 1%, 5%, 10% level.
Table 5-2 reports the results of the non-linear processing rules. We decided to
estimate the constant of the regression model; it would not affect the coefficient of the
stages, but allows for possible scaling. Considering the panel nature of trip satisfaction
data, we estimated panel effects of the non-linear processing rules. The explained
variance of the linear processing rule is, as expected, in the same order of magnitude as
the processing rules listed in Table 5-1. The conjunctive rule seems to slightly better
capture the way the satisfaction for the stages are processed to derive at an overall
satisfaction for the trip. This suggests that the stage with the lowest satisfaction exerts
most influence on overall trip satisfaction. The estimated coefficients suggest that the
contribution of the first stage to overall trip satisfaction is higher than the contribution of
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the second stage. Note that this finding is at variance with the peak-end rule, which
suggests that the final stage should have a higher contribution. Finally, the disjunctive
processing rule clearly performs worst of all considered processing rules.
5.4.1.2 Models with socio-demographic characteristics, mood and personality traits
As we have argued, trip satisfaction ratings may vary considerably between individuals
with different socio-demographic profiles. Moreover, ratings may be influenced by mood
and personality traits. If a person is in a good mood when the satisfaction ratings were
provided, the good mood may carry over to the satisfaction ratings and we might observe
a higher rating. Also when the actual trip was made if the person is in a good mood he
may have a good memory of that trip when he needs to recall it. Similarly, a bad mood
may result in a lower rating. Similar effects may be reflected in satisfaction ratings from
personality traits. Some people are more critical than others and less tolerant and such
personality traits may therefore affect measured satisfaction ratings. To control for such
effects, we estimated a second set of processing rules which in addition to trip stage
satisfaction also included socio-demographic characteristics, mood and personality traits.
We estimated the models in two steps. First step, we estimated regression models
using discrepancy of trip satisfaction and processing rules with socio-demographics,
moods, personality traits and panel effects. Second step, we calculated partial correlation
coefficient between trip satisfaction and processing rules controls for the socio-
demographics, moods and personality traits. Then we added the r-square of two steps to
get the total explained variance of processing rules. Table 5-3 shows the results of peak-
end, summation and averaging rules. One interesting finding is that trip satisfaction
ratings of more critical travelers turn out to be a little higher. This may appear
counterintuitive at first glance. However, in line with other research in social psychology,
it may indicate that more critical travelers have lower expectations and therefore their
satisfaction ratings may be higher. Travelers feeling enjoyment have slightly higher
significant ratings. The signs of the estimated effects are the same across all processing
rules. The results of adjusted R-square do not differ much.
Examination of Table 5-4 shows that the explained variance in trip satisfaction
ratings increases for conjunctive/disjunctive/linear processing rules after adding mood,
personality traits and socio-demographic variables. The increase in explained variance
compared to the base model (Table 5-2) is in the same order as the explained variance.
Exception includes critical is not significant in disjunctive model. Happy mood in
disjunctive model, depressed mood in all models, anger mood in all models turn out to
be significant. This suggests that mood have a structural effect.
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Table 5-3 Estimated results of peak-end, summation and weighted averaging rules with socio-demographic characteristics, mood, personality traits, and
panel effects
Processing Rule
Peak-end Rule
(Same as summation
rule in this case)
Equal-weight Averaging
Rule
Duration-weighted
Averaging Rule
Step 1 Regression analyzes
Coefficient SE Coefficient SE Coefficien
t SE
Age -0.022 0.014 -0.022 0.014 -0.025* 0.013
Gender -0.340 0.221 -0.340 0.221 -0.361 0.224
Critical 0.131** 0.053 0.131** 0.053 0.131** 0.053
Self-disciplined 0.046 0.063 0.046 0.063 0.049 0.063
Impatient 0.034 0.060 0.034 0.060 0.037 0.060
Reserved -0.052 0.053 -0.052 0.053 -0.066 0.053
Easy-going 0.026 0.066 0.026 0.066 0.019 0.069
Calm -0.077 0.076 -0.077 0.076 -0.055 0.078
Enjoyment 0.185** 0.073 0.185** 0.073 0.197*** 0.074
Relax -0.100 0.083 -0.100 0.083 -0.107 0.083
Worry 0.063 0.085 0.063 0.085 0.080 0.084
Sadness -0.087 0.085 -0.087 0.085 -0.098 0.081
Happy -0.054 0.059 -0.054 0.059 -0.049 0.058
Depressed 0.093 0.081 0.093 0.081 0.067 0.083
Anger -0.074 0.082 -0.074 0.082 -0.066 0.082
Stress 0.037 0.060 0.037 0.060 0.047 0.059
Tired 0.061 0.054 0.061 0.054 0.054 0.054
Variance parameter given is sigma
Std. Dev. 1.463*** 0.066 1.463*** 0.066 1.501*** 0.064
R2 0.158 0.158 0.158
Adjusted R2 0.082 0.082 0.082
Step 2 Partial correlation analyzes
Partial correlation
coefficient 0.574*** 0.574*** 0.568***
Square of partial
correlation coefficient 0.330 0.330 0.323
Total explained variance of processing rules
Total R2 0.412 0.412 0.415
***, **, * ==> Significant at 1%, 5%, 10% level.
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Table 5-4 Estimated results of conjunctive, disjunctive and linear processing rule with socio-demographic characteristics, mood, personality traits, and
panel effects for trip satisfaction
Processing Rule Conjunctive Model Disjunctive Model Linear Model
Coefficient SE Coefficient SE Coefficient SE
Constant 0.242** 0.079 1.055*** 0.081 2.276*** 0.813
β1 (Stage 1
Satisfaction) 0.420*** 0.059 0.284*** 0.056 0.377*** 0.061
β2 (Stage 2
Satisfaction) 0.245*** 0.057 0.162*** 0.055 0.212*** 0.061
Age -0.002 0.001 -0.001 0.001 -0.023 0.015
Gender -0.019 0.019 -0.018 0.022 -0.281 0.220
Critical 0.008* 0.004 0.007 0.005 0.086* 0.049
Self-disciplined 0.004 0.004 0.004 0.005 0.010 0.051
Impatient 0.001 0.004 0.002 0.005 0.022 0.050
Reserved -0.005 0.004 -0.006 0.005 -0.053 0.050
Easygoing 0.002 0.005 0.001 0.006 0.044 0.056
Calm -0.004 0.005 -0.003 0.006 -0.033 0.059
Enjoyment 0.019*** 0.005 0.020*** 0.006 0.233*** 0.062
Relax -0.004 0.006 -0.004 0.006 -0.079 0.065
Worry 0.003 0.006 0.001 0.007 0.035 0.069
Sadness -0.004 0.006 -0.002 0.006 -0.065 0.063
Happy -0.007 0.004 -0.010* 0.005 -0.041 0.050
Depressed 0.014** 0.006 0.018*** 0.006 0.156** 0.065
Anger -0.016*** 0.006 -0.015** 0.007 -0.146** 0.067
Stress 0.002 0.004 0.011 0.005 0.018 0.050
Tired 0.005 0.004 0.002 0.005 0.059 0.047
Random effects model: v(i, t) = e(i, t) + u(i)
Var[e] 0.012 0.013 1.655
Var[u] 0.003 0.004 0.252
Corr[v(i, t), v(i, s)] 0.175 0.251 0.132
Sum of Squares 2.841 3.490 377.673
R2 0.517 0.406 0.482
Adjusted R2 0.471 0.349 0.432
***, **, * ==> Significant at 1%, 5%, 10% level.
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Table 5-5 Summary of Adjusted R2 for different models of trip satisfaction
Model
Without socio-demographic
characteristics, personaliity,
and mood
With socio-demographic
characteristics, personality,
and mood
Peak-end rule 0.354 0.412
Summation rule 0.354 0.412
Equal-weight averaging rule 0.354 0.412
Duration-weighted averaging rule 0.341 0.415
Conjunctive trip satisfaction model 0.382 0.471
Disjunctive trip satisfaction model 0.272 0.349
Linear trip satisfaction model 0.347 0.432
5.4.1.3 Summary
Table 5-5 provides an overview of the explained variance of the different models. It shows
that the explained variance systematically increases by adding the scio-demographic
characteristics, personality traits and mood. The conjunctive processing rules best
describes the integration of trip stage satisfaction into trip satisfaction across the sample.
Regardless of the complexity of the models, the first stage more affects trip stage
satisfaction than the second stage. Controlling for personal characteristics, mood and
personality traits magnifies the influence of the second trip stage.
5.4.2 Relationship with daily travel satisfaction and trip satisfaction
A limitation of the analyzes reported in section 4.1 is that the sequences are short. It is
therefore not immediately clear whether the obtained results generalize to longer
sequences. Therefore, we decided to include in this paper the discussion of a second
analysis, which is concerned with the relationship between daily travel satisfaction and
trip satisfactions. Because most respondents made more trips on the survey data, this
sequence is longer. The analyzes are the same as for the analysis of the processing of
trip stage satisfaction. We start discussing the results of the pure processing strategies.
Next, we report the results of regression analysis in which reported trip satisfactions were
complemented with these control variables.
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92
Table 5-6 Results of peak-end, summation and averaging rules for daily travel satisfaction
Processing Rule Peak-end
Rule Summation Rule
Equal-weight
averaging Rule
Duration-weighted
Averaging Rule
Pearson Correlation
Coefficient (r) 0.655*** 0.691** 0.691*** 0.691***
r2 0.429 0.477 0.477 0.477
*** ==> Correlation is significant at the 1% level (2-tailed).
Table 5-7 Results of conjunctive, disjunctive, and linear processing rules without socio-demographic, mood, and personality traits for daily travel
satisfaction
Conjunctive Model Disjunctive Model Linear Model
Coefficient SE Coefficient SE Coefficient SE
Constant 0.286** 0.135 1.139*** 0.052 1.811* 0.975
β1 (Trip 1 Satisfaction) 0.366*** 0.024 0.242*** 0.021 0.403*** 0.028
β2 (Trip 2 Satisfaction) 0.361*** 0.027 0.204*** 0.023 0.328*** 0.030
β3 (Trip 3 Satisfaction) 0.062 0.050 0.069* 0.039 0.100* 0.053
β4 (Trip 4 Satisfaction) -0.113 0.159 0.009 0.085 -0.061 0.139
R2 0.551 0.401 0.509
Adjusted R2 0.549 0.398 0.506
***, **, * ==> Significant at 1%, 5%, 10% level.
5.4.2.1 Models with trip satisfactions only
As in the previous section, we first discuss the results of the peak-end, summation and
average rules. We use pearson correlation analyzes to estimate the performance of each
processing rule. Because the number of sequences is higher for this case, the rules may
show differences. This is also shown in Table 5-6, which indicates that the peak-end rule
performs the worst of the considered rules. The summation, equal-weight averaging rule
and duration-weighted averaging rule perform slightly better.
The results of the conjunctive, disjunctive and linear processing rules are listed in
Table 5-7. Consistent with the case of the integration of trip stage satisfaction, the
conjunctive rule has the highest explained variance, following by the linear rule. Both
perform better than peak-end, summation and average rules. Also in this case, the
disjunctive processing rule performs worst. If we examine the contribution of the various
trips to the overall daily trip satisfaction for the conjunctive rule, results indicate that
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from-home trip has more influence than the return-home trip. Moreover, first trip has
more impact than the second trip. This order is also found for the disjunctive and linear
processing rules.
5.4.2.2 Models with socio-demographics, mood and personality traits
The next model that was estimated added socio-demographic variables, mood and
personality traits to the processing rules. We estimated the models in two steps. First
step, we estimated regression models using discrepancy of total travel satisfaction and
processing rules with socio-demographics, moods, personality traits and panel effects.
Second step, we calculated partial correlation coefficient between total travel satisfaction
and processing rules controls for the socio-demographics, moods and personality traits.
Then we added the r-square of two steps to get the total explained variance of processing
rules. As shown in Table 5-8, adding these variables increases the explained variance of
the models, without affecting their relative performance. The peak-end rule is least
successful in explaining the relationship between trip satisfactions and daily travel
satisfaction, followed by the duration-weighted averaging rule, and the summation rule
same as equal-weight averaging which is slightly doing better than the duration-weighted
averaging rule. As for the socio-demographics, the effects of age and gender is not
significant. Reserved is the only personality trait that has a significant effect on daily travel
satisfaction. Being reserved is just significant at the 5 per cent level for all models. Being
enjoyment has a significant positive effect on daily travel satisfaction. It is significant for
four processing rules. Being sad has a positive effect but not significant at the 1 per cent
level for four models. Feeling depressed has a significant negative effect on daily travel
satisfaction. The significant negative coefficient can be observed for four processing rules.
Thus, on average, the more depressed respondents stated to feel, the lower their daily
travel satisfaction rating.
Table 5-9 displays the estimation results of the model adding socio-demographic
variables, mood and personality traits for the conjunctive, disjunctive and linear
processing rule. Similar to the results in Table 5-8, adding these variables increases the
explained variance of the models, without affecting their relative performance. The
disjunctive processing rule is least successful in explaining the relationship between trip
satisfactions and daily travel satisfaction, while the conjunctive model has the highest
explained variance, which is 0.562 (adjusted R-square). The marginal effect on daily
travel satisfaction of the from-home trip is higher than the marginal effect of the return-
home trip
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Table 5-8 Results of peak-end, summation and averaging rules with socio-demographics, mood and personality traits for daily travel satisfaction
Processing
rule Peak-end Rule Summation Rule
Equal-weight
Averaging Rule
Duration-
weighted
Averaging Rule
Step 1 Regression analyzes
Coef SE Coef SE Coef SE Coef SE
Constant 0.094 0.231 -0.335 0.225 -0.335 0.225 -0.230 0.223
Age 0.000 0.001 0.000 0.001 0.000 0.001 0.001 0.001
Gender 0.116 0.089 0.108 0.087 0.108 0.087 0.087 0.086
Critical 0.030 0.019 0.026 0.019 0.026 0.019 0.025 0.019
Self-disciplined -0.028 0.022 -0.011 0.022 -0.011 0.022 -0.004 0.022
Impatient 0.016 0.019 0.012 0.019 0.012 0.019 0.008 0.019
Reserved -0.042** 0.020 -0.039** 0.020 -0.039** 0.020 -0.040** 0.019
Easygoing -0.027 0.021 -0.009 0.021 -0.009 0.021 -0.011 0.020
Calm 0.009 0.025 -0.005 0.025 -0.005 0.025 -0.009 0.025
Enjoyment 0.085*** 0.026 0.099*** 0.025 0.099*** 0.025 0.096**
* 0.025
Relax 0.002 0.026 -0.004 0.025 -0.004 0.025 -0.003 0.025
Worry 0.015 0.029 0.006 0.028 0.006 0.028 0.001 0.028
Sadness 0.074** 0.030 0.061** 0.029 0.061** 0.029 0.071** 0.029
Happy 0.017 0.022 0.019 0.022 0.019 0.022 0.014 0.021
Depressed -0.082*** 0.032 -0.073** 0.031 -0.073** 0.031
-
0.085**
*
0.031
Anger 0.001 0.027 -0.023 0.027 -0.023 0.027 -0.017 0.026
Stress 0.004 0.024 0.015 0.023 0.015 0.023 0.016 0.023
Tired -0.010 0.021 -0.004 0.020 -0.004 0.020 0.000 0.020
R2 0.064 0.074 0.074 0.074
Adjusted R2 0.043 0.054 0.054 0.053
Step 2 Partial correlation analyzes
Partial
correlation
coefficient
0.620*** 0.655*** 0.655*** 0.658***
Square of partial
correlation
coefficient
0.384 0.430 0.430 0.433
Total explained variance of processing rules
Total R2 0.427 0.484 0.484 0.486
***, **, * ==> Significant at 1%, 5%, 10% level.
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Table 5-9 Results of conjunctive, disjunctive, and linear processing rule with socio-demographic characteristics, mood and personality traits for daily
travel satisfaction
Processing rule Conjunctive Model Disjunctive Model Linear Model
Coef SE Coef SE Coef SE
Constant 0.330** 0.137 1.068*** 0.059 2.257** 1.013
β1 (Trip 1 Satisfaction) 0.354*** 0.024 0.223*** 0.022 0.384*** 0.028
β2 (Trip 2 Satisfaction) 0.349*** 0.027 0.196*** 0.023 0.314*** 0.030
β3 (Trip 3 Satisfaction) 0.058 0.050 0.056 0.039 0.092 0.053
β4 (Trip 4 Satisfaction) -0.156 0.162 -0.025 0.089 -0.123 0.143
Age 0.000 0.000 0.000 0.000 0.001 0.001
Gender 0.005 0.006 0.002 0.007 0.075 0.083
Critical 0.003** 0.001 0.004** 0.002 0.031* 0.018
Self-disciplined -0.003* 0.002 -0.001 0.002 -0.032 0.021
Impatient 0.000 0.001 0.001 0.002 0.005 0.018
Reserved -0.003** 0.001 -0.004** 0.002 -0.040** 0.019
Easygoing -0.001 0.001 -0.000 0.002 -0.008 0.020
Calm 0.001 0.002 0.001 0.002 0.006 0.024
Enjoyment 0.005*** 0.002 0.006*** 0.002 0.075*** 0.024
Relax -0.000 0.002 0.001 0.002 -0.004 0.024
Worry 0.003* 0.002 0.003 0.002 0.030 0.024
Sadness -0.000 0.000 -0.000 0.000 -0.001 0.001
Happy 0.001 0.002 -0.000 0.002 0.013 0.021
Depressed -0.004** 0.002 -0.003 0.002 -0.063** 0.028
Anger -0.000 0.002 -0.002 0.002 0.001 0.006
Stress 0.001 0.002 0.001 0.002 0.020 0.022
Tired -0.000 0.001 -0.001 0.002 0.004 0.019
R2 0.573 0.428 0.534
Adjusted R2 0.562 0.412 0.521
***, **, * ==> Significant at 1%, 5%, 10% level.
As for the socio-demographics, same for the other processing rules shown in table
5-8, both age and gender have non-significant effect on daily travel satisfaction. Being
critical is significant at the 5 per cent level for conjunctive and disjunctive model and at
the 10 per cent level for linear model. Its coefficient is positive, implying that on average
respondents who are more critical show a higher daily travel satisfaction rating. Being
self-disciplined is significant at the 10 per cent level only for conjunctive model and has
negative impact on the level of satisfaction. Being reserved is now significant and negative
at the 5 per cent level for conjunctive, disjunctive and linear rule.
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Table 5-10 Summary of Adjusted R2 for different models of daily travel satisfaction
Processing Rule
Without Socio-demograpic
Characteristics, Personaliity,
and mood
With Socio-demograpic
Characteristics, Personality,
and mood
Peak-end Rule 0.429 0.427
Summation Rule 0.477 0.484
Equal-weight Averaging Rule 0.477 0.484
Duration-weighted Averaging Rule 0.477 0.486
ConjunctiveTrip Satisfaction Model 0.549 0.562
Disjunctive Trip Satisfaction Model 0.398 0.412
Linear Trip Satisfaction Model 0.506 0.521
As with the other processing rules, mood of enjoyment has a positive significant
effect on daily travel satisfaction. It is significant for all three processing rules. Mood of
worry is significant at the 10 per cent level only for conjunctive model. Feeling depressed
has a significant negative effect. The significant negative coefficient can be observed for
conjunctive and linear rule.
5.4.2.3 Summary
Table 5-10 provides an overview of the explained variance of the different models in the
context of daily travel satisfaction. It shows that the explained variance systematically
increases by increasing the complexity of the model except for the peak-end rule.
Regardless of the complexity of the model, the conjunctive processing rules best describes
the integration of trip satisfaction into daily travel satisfaction across the sample. The first
trip more affects travel satisfaction that the second trip.
5.5 Conclusion
Satisfaction ratings are routinely asked in many industries. Nowadays, customer
satisfaction questionnaires are distributed after every purchase. Also in public
transportation, a growth in the use of such scales to monitor service quality can be
observed. In addition to monitoring general trends in customer satisfaction, the ratings
also allow managers and policy makers to identify aspects of service delivery that can be
improved and maybe should be improved to attract new customers and/or enhance
loyalty among current customers.
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When ratings of trip and travel satisfaction appear easy to provide, the task is in
fact cognitively quite demanding. Respondents need to retrieve the various trips and trip
stages from their memory, re-enact the trip to recall their experience and then judge the
various attributes influencing their satisfaction and integrate these into an overall
satisfaction rating. It is important and relevant therefore to understand the processing
rules that customers apply in this process. If wrong assumptions about the process are
made, it likely results in biased conclusions, which in turn may lead to counterproductive,
ineffective or inefficient policy or managerial recommendations.
Research in travel behavior on this topic has been very scarce, and moreover the
few scholars uniformly used Kahneman (2000) peak-end rule as the source of inspiration.
It suggests that the travel satisfaction research community is fascinated by this rule.
Indeed, the rule seems appealing. It states that satisfaction assessment of a long series
of episodes is best predicted by the average of the last satisfaction and either the highest
of lowest satisfaction, deviating most from the average. The recency effects may be
explained because it was the last experienced and thus closest to the moment of
elicitation. The most deviating experience may have made most impact.
To contribute to this still largely unexplored area of research in travel behavior
research, we compared the performance of a set of processing rules that assume distinct
underlying decision-making processes using data on public transport use collected in Xian,
China. These processing rules range from taking only the best attribute satisfaction into
account or the worst to some weighted averaging process. Thus, these rules differ in
terms of the degree of rationality that is assumed.
Based on the results of this study, the following conclusions may be drawn. First,
we found little support for the prevalence of the peak-end rule. In fact, except for the
disjunctive rule, it consistently had the lowest explained variance, also after controlling
for socio-demographics, mood and personality traits. Rather, for all estimated models,
the conjunctive processing rule had the highest associated explained variance. It suggests
that the episode respectively trip with the lowest satisfaction dominates overall
satisfaction. Second, we also did not find much evidence of recency effects. Rather, for
both the trip stages and the trips, the satisfaction of the first trip and first stage has higher
marginal effects on overall satisfaction that more recent trips and stages.
Suzuki et al. (2014) also did not find much support for the peak-end rule and left
open the possibility that the length of the sequence may cause the difference. We contend
that it is travel itself that may explain the difference. If we have an activity with a relatively
homogeneous experience, it is likely that an extreme experience (negative or positive) to
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be strongly correlated with overall satisfaction and is a better predictor than the
satisfaction of the longest episode. Consider as an example a long haul night flight. The
experience is rather homogeneous, maybe except take off, landing and meal. Now
suppose there is heavy turbulence. Such episodes tend to last for only few minutes, but
likely strongly impact traveler satisfaction. Compared to such activities, daily travel shows
much more variation and many more factors potentially influence satisfaction ratings.
Consequently, it may be that individuals retrieve more episodes and/or a wider set of
factors influencing their satisfaction when providing satisfaction ratings.
More replicative studies are needed to accumulate evidence of the predictive
performance of the difference processing rules. We hope this study will stimulate such
efforts.
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6
LINKING TRAVEL SATISFACTION AND
SUBJECTIVE WELL-BEING
6.1 Introduction
Since long, subjective well-being, a concept closely related to life satisfaction, happiness
and fulfilment has been a topic of research in social and psychological sciences. Subjective
well-being expresses people’s cognitive and emotional evaluations of their lives. These
evaluations include people’s emotional reactions to events, their moods, judgments of life
satisfaction and fulfilment, and satisfaction with different domains of life such as marriage
and work (Diener et al., 2003). Thus, subjective well-being is a multi-dimensional concept
that covers many life domains. The concept has been measured using a variety of
different scales (Diener et al., 1985; Diener and Suh, 1997). As an alternative to the
concept of utility, subjective well-being has been proposed as a measure of individuals’
benefits in a number of different life domains (Kahneman et al., 1999).
People’s satisfaction with different domains of their life thus influences subjective
well-being. The effect of satisfaction in a specific domain on overall subjective well-being
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has been typically explained on the basis of the bottom-up spill over theory of subjective
well-being (Sirgy, 2001). This theory posits that affect related to a consumption
experience contributes to affecting satisfaction in specific life domains, which in turn
influences satisfaction with life at large (Sirgy et al., 2011). Many scholars advocated this
bottom-up approach. For example, Mohan-Neill (1995) predicted life satisfaction using
variables such as work satisfaction and satisfaction with personal relationships. The
results indicated that satisfaction with personal relationships is more predictive of life
satisfaction than work satisfaction, although both were significant predictors of life
satisfaction. Similarly, Oishi et al. (1999) found that value orientation moderates the
effects of domain satisfaction on overall life satisfaction. Dasgupta and Majumdar (2000),
using the bottom-up approach, found that satisfaction with material possessions, family
life, self-development, and local government administration have a significant effect on
life satisfaction of Calcutta residents. As a final example, Grzeskowiak et al. (2006)
concluded that satisfaction with housing influences satisfaction in various other life
domains, which in turn affects satisfaction with life. In the context of travel, the spill over
theory would imply that high travel satisfaction would contribute to high subjective well-
being.
In principle, there may also be an effect of overall well-being on travel satisfaction,
which would indicate a top-down approach in the study of subjective well-being in the
sense that their overall perspective on life may affect how people feel about specific life
domains (see, for example, Diener, 1984; Headey et al., 1991). Few studies, however,
have examined this top-down relationship using empirical data. Abou-Zeid and Ben-Akiva
(2011) estimated the effects of overall well-being on commute satisfaction using a
structural equations model and found that people who have a high level of overall well-
being are likely more satisfied with their commute.
Thus, these studies suggest that an understanding of how domain-specific
satisfaction contributes to overall well-being and how overall well-being influences domain
satisfaction has been a pertinent topic of research in social sciences and marketing
research for many decades. However, the studies in these fields of study have not
considered travel satisfaction, even though travel is an important daily consumption and
experience. Knowledge about the interrelationship between subjective well-being and
travel satisfaction has only recently accrued since the study of travel satisfaction has
appeared on the agenda of travel behavior researchers. Since the last seven years,
transportation researchers have examined determinants and effects of travel behavior
(see, for example, Abenoza et al., 2017; De Vos et al., 2016; Yang et al., 2015). The
interest in the topic is fast expanding.
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Although the rapidly growing number of studies in travel behavior research on
travel satisfaction has substantially increased our knowledge about travel satisfaction,
limitations of prior research leave open sufficient room for additional research. In this
chapter, we focus our attention on the following relatively unexplored aspects of travel
satisfaction in travel behavior research. First, few studies examined the interrelationships
between travel satisfaction and overall well-being by simultaneously considering the
relationship between satisfaction with other life domains and overall subjective well-being.
The existing partial conceptualisation and analysis may introduce bias in the results,
particularly when domains other than travel influence subjective well-being and
satisfactions with various life domains are correlated. Thus, in this study, we adopt this
more general approach.
Second, prior travel behavior research has predominantly adopted a hedonic view
of well-being. According to this view, researchers have equated well-being with hedonic
pleasure based on the contention that people’s goal of life is maximizing their amount of
pleasure. However, travel and activities during trip also allow people to achieve purpose
and meaning of life. This so-called eudemonic well-being has been under-researched in
travel behavior analysis. Thus, rather than focusing on a specific view of well-being,
different views were entertained in this study.
Third, personality traits may influence the degree of experienced travel satisfaction
and responses to travel satisfaction scales. Diener and Lucas (1999) argued that the
strong influence of personality is seen as one of the most replicable and most surprising
findings in subjective well-being research. In fact, the correlation between subjective well-
being and personality such as extraversion and neuroticism is stronger than correlations
with any demographic predictor (Lucas and Fujita, 2000; Richard and Diener, 2009; Steel
et al., 2008). Personality may capture structural response patterns of individuals. However,
personality traits have been largely ignored in studies of travel satisfaction. Thus, in the
current analysis, we included personality scales in the measurement and analysis to allow
for personality traits effects moderating the relationships.
Thus, this chapter first examines the mutual dependency between travel
satisfaction and subjective well-being relative to satisfaction with other life domains, while
controlling for personality traits and selected socio-demographic variables. To analyze the
direct and indirect relationships between these constructs, a structural equation model is
estimated. Furthermore, this chapter formulates and estimates a latent class structural
equation model. It assumes that the co-dependent relationships between domain
satisfaction and overall life evaluation vary between latent classes. In that sense, the
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latent class structural equations are similar in idea to the latent class models that have
been widely applied in transportation research. Latent classes are identified that differ in
terms of the parameters of the kind of model that is estimated.
6.2 Structural hypotheses
6.2.1 Travel satisfaction and subjective well-being
Since the 1970s, the concept of subjective well-being has caught the attention of
sociologists, economists and psychologists. Although the term subjective well-being has
been recognized in some studies, related terms such as happiness, life satisfaction, quality
of life were sometimes also used in different literatures (Diener, 1984). Among those
definitions of subjective well-being, two main views have been identified – the hedonic
view and the eudaimonic view (Ryan and Deci, 2001). Kahneman et al. (1999) defined
the hedonic view as the study of “what makes experiences and life pleasant and
unpleasant”. In contrast, the eudaimonic view of subjective well-being emphasizes the
meaning of life, personal growth and self-realization. Related scales have been designed
to measure different views of subjective well-being. We summarized the scales of hedonic
and eudaimonic views of subjective well-being that have appeared in the recent literature
(Table 2-2). Examples of measurement of hedonic well-being are scales such as the
Positive and Negative Affect Scale (PANAS) (Watson et al., 1988), the Scale of Positive
and Negative Experience (SPANE) (Diener et al., 2010), the Swedish Core Affect Scale
(SCAS) (Västfjäll et al, 2002; Västfjäll and Gärling, 2007) mainly captures affective
feelings, while the Satisfaction with Life Scale (SWLS) (Diener et al., 1985; Pavot and
Diener, 1993) is mostly used to measure cognitive evaluation. In this study, we put
emphasis on the cognitive evaluation of hedonic well-being normally known as life
satisfaction. Relatively fewer scales have been designed to measure eudaimonic view of
subjective well-being such as the Personal Well-being Scale (PWS) (Ryff, 1989), the
Questionnaire for Eudaimonic Well-being (QEWB) (Waterman et al., 2010) and the
Flourishing Scale (Diener et al., 2010).
Scales mentioned above were used when researchers focused on the global
evaluation of life. In addition, subjective well-being has been proposed as a measure of
individuals’ benefits in different life domains. The relationship between overall subjective
well-being and domain life satisfaction has been a pertinent topic of research in social
sciences for many decades. On the one hand, the effect of satisfaction in a specific domain
on overall subjective well-being has been typically explained based on the bottom-up spill
over theory of subjective well-being (Sirgy, 2001). This theory posits that affect related
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to a consumption experience contributes to affecting satisfaction in specific life domains,
which in turn influences satisfaction with life at large (Sirgy et al., 2011). Many scholars
advocated this bottom-up approach. On the other hand, there may also be an effect of
overall well-being on travel satisfaction, which would indicate a top-down approach in the
study of subjective well-being in the sense that their overall perspective on life may affect
how people feel about specific life domains (see, for example, Diener, 1984; Headey et
al., 1991). Few studies, however, have examined this top-down relationship using
empirical data. Only since the study of travel satisfaction has appeared on the agenda of
travel behavior researchers, researchers have started to explore the relationship between
travel satisfaction and subjective well-being (Bergstad et al., 2011; Ettema et al., 2010;
Hansson et al., 2011; Martin et al., 2014; Sirgy et al., 2011). Even so, studies in this field
have not emphasized the eudaimonic view of well-being. In this study, we focus on both
hedonic and eudaimonic well-being and their relationships with travel satisfaction. We
estimated the interdependency between travel satisfaction, overall life satisfaction and
eudaimonic well-being.
6.2.2 Personality and subjective well-being
Some studies have addressed the research question “Who is happy”. The majority of
studies on subjective well-being examined biosocial indicators such as gender and age.
Other studies have suggested that personality may be one of the strongest determinants
of subjective well-being. For example, DeNeve and Cooper (1998) examined 137 distinct
personality constructs as correlates of subjective well-being. Many personality traits were
significantly associated with subjective well-being. For instance, of the “Big Five”
personality traits (Openness to experience, Conscientiousness, Extraversion,
Agreeableness and Neuroticism) (Costa and McCrae, 1992), extraversion and
agreeableness were positively associated with subjective well-being, whereas neuroticism
was negatively associated with it. McCrae and Costa (1991) found that extraversion leads
to a positive affect, while neuroticism leads to a negative affect. Openness correlates
positively with both positive and negative affect. Agreeableness and conscientiousness
have instrumental effects on subjective well-being.
Diener and Lucas (1999) suggested that these big five findings should not come
as a surprise because extraversion is characterized by a positive affect and neuroticism is
virtually defined by a negative affect. Some researchers have examined the relation of
the big five personality traits to psychological well-being. Schmutte and Ryff (1997) found
that extraversion, conscientiousness, and low neuroticism were linked with the
eudaimonic dimensions of self-acceptance, mastery, and life purpose; openness to
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experience was linked to personal growth; agreeableness and extraversion were
connected to positive relationships; and low neuroticism was associated with autonomy.
Although personality has been shown to be a major determinant of subjective
well-being in the literature, few studies explored the correlation between personality and
satisfaction in the travel domain. Ory and Mokhtarian (2005) found that attitudes,
personality, and lifestyle are key variables affecting travel liking. Abou-Zeid and Ben-Akiva
(2011) found a positive correlation between an organized personality and work commute
satisfaction.
6.3 Data collection and measurement scales
6.3.1 Procedure
Data for this study were collected in Xi’an city, China. Xi’an is the capital city of Shaanxi
province, located in the northwest of China with a population of almost 8.46 million people.
The data used in this study were collected in January 2015 using random sampling. A
face-to-face interview, based on a structured questionnaire, was used to collect the data.
The interviewers consisted of a pool of graduate and master students of Chang’an
University, who were specially trained for the interviews. Several versions of the
questionnaire were pre-tested. Changes in wording and especially explanation were made
until no more critical problems remained. The quality of the returned data, differentiated
by interviewer, was monitored and appropriate action was taken if needed. A total of
1445 respondents completed the questionnaire.
The operationalization of the conceptual framework requires data on subjective
well-being, which included life satisfaction/evaluation, domain satisfaction and
eudaimonic well-being; personality traits and socio-demographic characteristics. The
survey included questions pertaining to each of these concepts. First, the questionnaire
asked about the respondent personal characteristics including age, gender, type of job,
education, household income, etc. Second, respondents were asked to rate themselves
on a set of personality traits. Next, trip information and the mood experienced during the
travel day were elicited, followed by a segment on overall trip satisfaction and well-being.
The next segment prompted respondents to judge the service quality of different
transport modes. The last part concerned the measurement of subjective well-being.
To reduce possible correlations due to halo effects between personality traits and
mood, and between these constructs and satisfaction, the measurements of these
constructs were separated as much as possible. As indicated, first, data on personality
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
105
traits were collected, immediately after the elicitation of socio-demographic information.
Moods were measured separately before the trip diary was constructed. Ratings of
satisfactions of trip stages were solicited after retrieving all trip attributes in the trip diary.
The minimum duration to completion of a survey was around 1 hour, the longest was
about two hours.
6.3.2 Measurement
Our literature review indicated that previous research has relied on different scales to
measure subjective well-being. Methodologically, the notion of a scale presumes its
generalizability has been proven. In reality, at best partial evidence can be given in the
sense that one can never be sure that when a new sample of respondents completes a
set of validated items the same or similar reliability will be obtained (see, for example,
De Vos et al., 2015). Existing scales have been developed in the American and European
context. To the best of our knowledge, the scales have never been validated in a Chinese
context. Therefore, rather than uncritically applying an existing scale, we systematically
evaluated the relevance of the items of the various scales, translated these into Chinese
trying to find the same subtlety and connotations in the choice of words, and explicitly
re-analyzed the validity and reliability of the resulting scales. Based on the literature, this
study measured subjective well-being in terms of three categories: overall life evaluation,
eudaimonic well-being and domain satisfaction.
6.3.2.1 Overall life satisfaction/evaluation
Four questions and five statements were used to measure life satisfaction. The four
questions are: (1) Imagine a ladder with steps numbered from 0 at the bottom to 10 at
the top. The top of the ladder represents the best possible life for you and the bottom of
the ladder represents the worst possible life for you. On which step of the ladder would
you say you personally feel you stand at this time? (2) Overall, how satisfied with your
life were you five years ago? (3) As your best guess, overall how satisfied with your life
do you expect to feel in five years’ time? (4) Overall, to what extent do you feel the things
you do in your life are worthwhile?
The five statements about life evaluation are (1) In most ways my life is close to
my ideal; (2) The conditions of my life are excellent; (3) I am extremely satisfied with my
life; (4) So far, I have gotten all important things I want in life; (5) If I could live my life
over, I would change almost nothing. Values again ranged from 0 (“strongly disagree”)
to 10 (“strongly agree”).
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6.3.2.2 Eudaimonic well-being
Eudaimonic well-being was measured on the basis of eight statements: (1) I lead a
purposeful and meaningful life; (2) My social relationships are supportive and rewarding;
(3) I am engaged and interested in my daily activities; (4) I actively contribute to the
happiness and well-being of others; (5) I am competent and capable in the activities that
are important to me; (6) I am a good person and live a good life; (7) I am optimistic
about my future; (8) People respect me. Respondents were invited to answer these
questions using a 11-point scale, ranging from 0 (“strongly disagree”) to 10 (“strongly
agree”).
6.3.2.3 Domain satisfaction
Individuals are assumed to rate their overall life satisfaction by cognitively integrating
their satisfaction ratings for various life domains. A total of fourteen questions about
satisfaction with different life domains were included in our questionnaire: standard of
living, health, achievements in life, personal relationships, safety at home, safety out of
home, relationship with neighbours, relationship with friends, relationship with colleagues,
future security, the amount of time you do the things that you like, quality of local
environment, work and general travel experience. Values ranged from 0 (“not at all
satisfied”) to 10 (“extremely satisfied”).
6.3.2.4 Personality traits
Researchers have relied on a variety of psychometric scales for measuring personality
traits, including the Ten-Item Personality Inventory (TIPI), which is a very brief measure
of the Big-Five personality domains (Gosling et al., 2003). This instrument is useful in
situations when fewer items are needed, or researchers can tolerate the somewhat
diminished psychometric properties associated with such limited items instruments. For
each item, we systematically assessed whether we could reason the relationship between
the personality trait and travel satisfaction. Ultimately, we selected six out of the ten-
items: critical, self-disciplined, impatient, reserved, easy-going and calm. We assumed
that these personality traits may systematically affect people’s experience of travel and/or
their ratings of travel satisfaction.
Respondents were asked to rate the extent they agree or disagree with personality
statements such as “I see myself as critical.” on an 11-point scale, ranging from “disagree
strongly” to “agree strongly”. Thus, for reasons similar to the measurement of satisfaction,
single-item scales were used to measure the different personality traits.
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Table 6-1 Descriptive statistics of the sample (N = 1445)
Socio-demographics Category Observations Percentage
Age <18 17 1%
18-25 410 28%
25-35 672 47%
35-45 211 15%
45-55 95 7%
>=55 40 3%
Gender Male 669 46%
Female 776 54%
Education Lower than high school 89 6%
High school 303 21%
Associate degree/Bachelor 910 63%
Master 128 9%
PhD 15 1%
Household size
(person)
1 337 23%
2-3 659 46%
>3 449 31%
Household income
(RMB/Month)
<4000 513 36%
4000-8000 566 39%
>8000 366 25%
Household car
ownership
No car 721 50%
One car 708 49%
More than one car 16 1%
Job type Full time employed (fixed schedule) 738 51%
Full time employed (flexible schedule) 304 21%
Part time employed 58 4%
Full time student 280 19%
Part time student 60 4%
Unemployed 5 0%
6.3.2.5 Socio-demographic characteristics
The following socio-demographic characteristics were measured: age (year), gender (0
= female; 1 = male), household size (number of persons living in your family), household
income (three classes ranging from lower than 4000 RMB to more than 8000 RMB),
education (five classes ranging from lower than high school to doctoral degree), job type
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(six classes including fix schedule full time employed, flexible schedule full time employed,
part time employed, full time student, part time student and unemployed).
6.3.3 Sample description
1445 respondents were used in the analyzes. Distributions of characteristics of the sample
are shown in Table 6-1. It demonstrates that 46% of the sample is between 25 and 35
years of age, 28% is between 18 and 25 years old, while only 3% of the sample is older
than 55. Table 6-1 also shows that 54% of the sample is female, while 46% is male. 31%
of the sample is living in households with more than 3 persons, while 23% is living alone.
Even though 73% of the sample has a professional education, income levels are medium.
More than half of the sample (51%) is employed full time (fixed schedule).
6.4 Structural equation model between travel satisfaction and
subjective well-being
6.4.1 Conceptual framework
Based on our review of the satisfaction literature in travel behavior research and other
fields of inquiry, and a critical reflection of the relevance and applicability of these studies
to examine the relationship between travel satisfaction and subjective well-being in a
methodologically rigorous manner that avoids various sources of bias, we developed a
conceptual framework. Figure 6-1 shows the conceptual model that was used to develop
the structural equation model that we estimated to examine the influence of travel
satisfaction on subjective well-being, and the reverse relationship. As the figure shows,
we assume that overall life satisfaction is influenced by domain-specific satisfaction, and
vice-versa that domain satisfaction may also be influenced by overall life satisfaction. This
reflects the idea that the examination of the relationships between travel satisfaction and
overall life satisfaction should include satisfaction with other life domains to avoid bias.
Satisfaction ratings of life domains may be influenced by judgements of overall life
satisfaction. Hence, we assume that overall life satisfaction, domain satisfaction and life
evaluation are mutually correlated. In addition, following findings in social psychology,
we assume that personality may influence well-being, or at least the subjective rating of
well-being. Depending on particular personality traits, people may differently rate their
satisfaction with different life domains and overall life satisfaction. Finally, we allow for
correlations between socio-demographic variables, and personality traits and subjective
well-being. Figure 6-1 depicts the hypothetical causal model.
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Figure 6-1 Conceptual framework of SEM
6.4.2 Validation
In order to validate the scales and assess the formulated conceptual framework, an
exploratory factor analysis (EFA) was conducted using half of the sample based on three
theoretical constructs: (1) eudaimonic well-being; (2) life evaluation; and (3) the different
domain-specific satisfactions. The results of the EFA, using varimax rotation and a factor
loading of 0.40 as the threshold to retain items in a factor, led to three independent
factors as shown in Table 6-2: (1) eudaimonic well-being; (2) social network satisfaction;
and (3) life evaluation.
Important in these results is the fact that respondents seem to differentiate
between hedonic and eudaimonic interpretations of subjective well-being. Moreover, the
different questions related to satisfaction with social network relationships loaded on a
single different factor. Other domain-specific satisfactions do not show strong
communalities, suggesting they may be judged independently from other domain
satisfactions, which is a positive finding.
After the EFA procedure, a confirmatory factor analysis (CFA) specifying the
posited relationships of the observed indicators to the latent variables, was conducted
using the other half of the sample (Table 6-3). The following goodness of fit indices were
obtained: Chi square/df = 4.098, Comparative Fit Index (CFI) = 0.944, Tucker Lewis
Index (TLI) = 0.934, Standardized Root Mean Square Residual (SRMR) = 0.042. These
statistics support the validity of the constructed scales.
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Table 6-2 Results of the exploratory factor analysis (N = 722)
Latent variables and Measured indicators Factor
loading
Explained
variance
Mean
(St. Dev)
Eudaimonic well-being 21.038
I lead a purposeful and meaningful life. ** 0.606 6.95 (1.963)
My social relationships are supportive and rewarding. ** 0.555 6.93 (1.971)
I am engaged and interested in my daily activities. ** 0.634 6.68 (2.085)
I actively contribute to the happiness and well-being of
others. ** 0.636 6.80 (1.938)
I am competent and capable in the activities that are
important to me. ** 0.630
6,92 (1.778)
I am a good person and live a good life. ** 0.566 7.55 (1.771)
I am optimistic about my future. ** 0.547 7.65 (1.808)
People respect me. ** 0.603 7.61 (1.597)
Social network satisfaction 16.044
How satisfied are you with your friends? * 0.856 8.32 (1.416)
How satisfied are you with your colleagues? * 0.675 7.95 (1.668)
How satisfied are you with your personal relationships? * 0.633 7.81 (1.611)
How satisfied are you with your neighbours? * 0.486 7.36 (2.173)
Life evaluation 14.604
In most ways my life is close to my ideal. ** 0.699 6.34 (1.960)
The conditions of my life are excellent. ** 0.801 5.99 (1.955)
I am extremely satisfied with my life. ** 0.727 6.33 (2.047)
Please imagine a ladder with steps numbered from 0 at
the bottom to 10 at the top. The top of the ladder represents
the best possible life for you and the bottom of the ladder
represents the worst possible life for you. On which step of
the ladder would you say you personally feel you stand at this
time?
0.551 6.94 (1.667)
Total variance explained 51.687
Notes: Rotation method: Varimax.; Kaiser-Meyer-Olkin Measure of Sampling Adequacy = 0.916.
*Scale: 0 = not at all satisfied, 10 = extremely satisfied.
**Scale: 0 = strongly disagree, 10 = strongly agree.
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Table 6-3 Results of the confirmatory factor analysis (N = 723)
Latent variables and Measured indicators STDYX Standardized
Loadings (S.E.)
Eudaimonic well-being
I lead a purposeful and meaningful life. ** 0.691 (0.022)
My social relationships are supportive and rewarding. ** 0.698 (0.021)
I am engaged and interested in my daily activities. ** 0.724 (0.020)
I actively contribute to the happiness and well-being of others. ** 0.673 (0.023)
I am competent and capable in the activities that are important to
me. ** 0.698 (0.021)
I am a good person and live a good life. ** 0.705 (0.021)
I am optimistic about my future. ** 0.750 (0.019)
People respect me. ** 0.739 (0.019)
Social network satisfaction
How satisfied are you with your friends? * 0.735 (0.023)
How satisfied are you with your colleagues? * 0.758 (0.022)
How satisfied are you with your personal relationships? * 0.692 (0.025)
How satisfied are you with your neighbours? * 0.594 (0.029)
Life evaluation
In most ways my life is close to my ideal. ** 0.823 (0.025)
The conditions of my life are excellent. ** 0.769 (0.018)
I am extremely satisfied with my life. ** 0.879 (0.013)
Please imagine a ladder with steps numbered from 0 at the bottom to
10 at the top. The top of the ladder represents the best possible life for
you and the bottom of the ladder represents the worst possible life for
you. On which step of the ladder would you say you personally feel you
stand at this time?
0.669 (0.023)
Notes:
*Scale: 0 = not at all satisfied, 10 = extremely satisfied.
**Scale: 0 = strongly disagree 10 = strongly agree.
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Table 6-4 Standardized direct effect between subjective well-being variables (N=1445)
Variables Life
evaluation
Social
network
Living
standard Health
Life
achievement
Safety at
home
Safety out
of home
Future
security
Amount of time do what you like
Environme
nt quality Work Travel
Overall well-being
Eudaimonic well-
being 0.694 0.496 0.291 0.213 0.209 0.434
Life evaluation 0.282 0.650 0.471 0.260 0.229 0.270 0.262 0.287
Domain
satisfaction
Social network 0.290
Health 0.106
Life achievement 0.321 0.144
Safety at home 0.165
Future security 0.144
Amount of time do
what you like 0.125
Environment quality 0.157 0.111 0.154
Work 0.185
Travel 0.086 0.067
Note: Significant at 0.05 level.
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Table 6-5 Standardized direct effect of personality and socio-demographic variables on subjective well-being (N=1445)
Variables Eudaimonic
well-being Living standard Health Safety at home
Safety out of
home
Amount of time do
what you like
Environment
quality Travel
Personality
Self-disciplined 0.188 0.064 0.073 0.106
Impatient -0.064 -0.073
Easy-going 0.138 0.074 0.061
Reserved 0.128
Calm 0.102
Socio-
demographics
Age 0.129 -0.119 -0.060
Gender 0.083
Note: Significant at 0.05 level.
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Table 6-6 Standardized direct effect of socio-demographic variables on personality traits (N=1445)
Variables Self-disciplined Reserved Easy-going Calm
Socio-demographics
Age 0.150 0.122 -0.120 0.226
Gender 0.095 0.066 0.082
Note: Significant at the 0.05 level.
Table 6-7 Goodness of fit measures for the structural equation model (N=1445)
Goodness of fit measure Index Criteria
χ2/df 3.573 < 5.0
RMSEA 0.042 < 0.08
SRMR 0.038 < 0.05
CFI 0.937 > 0.9
TLI 0.925 > 0.9
Notes:
χ2 = Chi-square;df = degree of freedom;RMSEA = root mean square error of approximation;
SRMR = standardized root mean square residual;CFI = comparative fit index;TLI = Tucker Lewis
index.
Based on our conceptual framework and the results of the factor analyzes, we
estimated the corresponding structural equation model. The primary interest is in the
relationship between travel satisfaction and overall subjective well-being without making
any a priori claims regarding the direction of causality. Because subjective well-being may
also be influenced by satisfaction with other life domains, these were also included in the
analysis. As discussed, a distinction was made between hedonic and eudemonic
subjective well-being. Personality was included in the model based on the hypothesis that
particular personality traits may influence satisfaction ratings. Finally, we examined the
effect of several socio-demographic variables. As we only found consistent effects for age
and gender, the reported results of the structural equation model only include these
variables.
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The estimated structural equation model and the standardized coefficients of the
estimated relationships are shown in Table 6-6. Table 6-7 list the calculated goodness of
fit measures. It shows that all measures meet commonly used criteria for a good fit.
Table 6-6 show the results of the estimated structural equation model. All
coefficients of the measurement components of the SEM are nonzero and significant at
conventional levels. The final model consists of 16 endogenous variables: life evaluation,
eudaimonic well-being, social network satisfaction, satisfaction with the various domains,
including travel satisfaction, and personality traits self-disciplined, calm, reserved, and
easy going. Age and gender are the exogenous variables in the model.
6.4.3 Measurement model
The SEM model measures the latent variable eudaimonic well-being based on 8
statements; all coefficients exceed 0.6, indicating that all statements are strongly
correlated with eudaimonic well-being. The latent variable “Overall life
satisfaction/evaluation” is measured in terms of three life evaluation statements: “In most
ways my life is close to my ideal (λ = 0.769)”, “I am extremely satisfied with my life (λ =
0.758)” and “The conditions of my life are excellent (λ = 0.739)”; and one life evaluation
question “On which step of the ladder would you say you personally feel you stand at this
time (λ = 0.726)”. The latent variable “Social network satisfaction” is measured in terms
of four domain satisfaction items: personal relationships (λ=0.771), relationship with
friends (λ = 0.722), relationship with colleagues (λ = 0.684) and relationship with
neighbours (λ = 0.579).
6.4.4 Structural model
Table 6-4 shows the interrelations between the subjective well-being constructs. First,
eudaimonic well-being is positively related to life evaluation (β = 0.694). Because life
evaluation measures hedonic well-being, this result is consistent with our hypothesis that
eudaimonic well-being affects hedonic well-being. For the relationship between
eudaimonic well-being and life domain satisfaction, results show that eudaimonic well-
being has positive and significant effects on social network satisfaction (β = 0.496), living
standard satisfaction (β = 0.291), future security satisfaction (β = 0.213), satisfaction of
the amount of time you do what you like (β = 0.209), and work satisfaction (β = 0.434).
Individuals with higher eudaimonic well-being are more likely to be satisfied with their
social network, living standard, future security, the amount of time do what you like and
work. Likewise, the correlations between life evaluation and domain satisfaction are
positive. Results show that life evaluation positively impacts satisfaction with health (β =
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0.282), life achievement (β = 0.650), safety at home (β = 0.471), safety out of home (β
= 0.260), future security (β = 0.229), the amount of time you do what you like (β =
0.270), environment quality (β = 0.262), and travel (β = 0.287). It indicates that the
effect of life evaluation on life achievement satisfaction is the strongest of all life domains.
Work satisfaction significantly influences life evaluation (β = 0.185), but satisfaction for
other life domains does not show significant effects. This indicates people who are more
satisfied with their work will achieve higher overall life satisfaction.
Travel satisfaction, as a domain of life satisfaction, is the focal point of this study.
Results show that travel satisfaction does not significantly influence life evaluation;
however, life evaluation strongly influences travel satisfaction (β = 0.287).
Table 6-4 also shows positive relationships between satisfactions for different life
domains. Results show that satisfaction of social network is correlated with health
satisfaction (β = 0.290). In turn, heath satisfaction is correlated with satisfaction of safety
out of home (β = 0.106). Similarly, satisfaction with life achievements shows a positive
relationship with satisfaction with living standard (β = 0.321) and future security (β =
0.144). Satisfaction of safety at home shows a significant relation with satisfaction with
social network (β = 0.165). The satisfaction with future security is significantly correlated
with the satisfaction with safety out of home (β = 0.144). The satisfaction of amount of
time you do what you like has a significant relationship with satisfaction with social
network (β = 0.125). The satisfaction with environment quality is significantly related to
satisfaction with safety out of home (β = 0.157), future security (β = 0.111) and the
amount of time you do what you like (β = 0.154). Finally, travel satisfaction shows a
significant relationship with the satisfaction with future security (β = 0.086) and the
amount of time you do what you like (β = 0.067).
Table 6-5 shows the effect of personality traits and socio-demographic variables
on subjective well-being. The model shows that personality traits do have a significant
effect on eudaimonic well-being and domain satisfaction. Particularly, eudaimonic well-
being is positively influenced by personality traits self-disciplined (β = 0.188), easy-going
(β = 0.138) and calm (β = 0.102). In contrast, the personality trait “impatient” negatively
influences eudaimonic well-being (β = -0.064). This suggests that self-disciplined, easy-
going and calm people are more likely to lead a meaningful and purposeful life. As might
be expected, people who are impatient are less likely to achieve their life purposes. As
for the effects of personality on domain satisfactions, a self-disciplined personality has
positive effects on satisfaction with the living standard (β = 0.064) and health (β = 0.073).
An impatient personality has a negative effect on satisfaction with health (β = -0.073).
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An easy-going personality has positive effects on satisfaction with health (β = 0.074) and
the amount of time you do what you like (β = 0.061). Finally, a reserved personality has
a positive effect on environment satisfaction (β = 0.128).
Age and gender also influence subjective well-being constructs. Age is positively
correlated with eudaimonic well-being (β = 0.129) and negatively correlated with health
satisfaction (β = -0.119) and safety at home (β = -0.060). Gender positively influences
satisfaction with safety out of home (β = 0.083).
There is also evidence of effects of age and gender on personality traits (Table 6-
6). Age has a positive effect on a self-disciplined personality (β = 0.150), a reserved
personality (β = 0.122), and a calm personality (β = 0.226) while it has a negative effect
on an easy-going personality (β = -0.120). Gender has a positive effect on a self-
disciplined personality (β = 0.095), an easy-going personality (β = 0.066), and a calm
personality (β = 0.082). Older people tend to be more self-disciplined, reserved and calm,
but less easy-going than younger people. Men tend to be more self-disciplined, easy-
going and calm than women.
6.5 A latent class structural equation model of co-dependent
relationships between domain satisfaction and subjective
well-being
Methodologically, a potential advantage of the structural equation and path models that
are primarily associated with satisfaction research is that these models allow the
estimation of quite complex direct and indirect relationships between socio-demographics,
personality traits, attributes of transportation models, satisfaction and well-being.
Interestingly, the evolution of choice models is also characterized by increasingly
complexity. For example, hybrid choice models (Ben-Akiva et al., 2002), add attitudes
and possibly other psychological constructs to utility in an attempt to better explain choice
behavior. Recently, these models have been extended to include social influence (Kim et
al., 2017). Hybrid choice models, however, do not allow estimating indirect and reciprocal
relationships. If such complexity would dictate the choice of model, research should prefer
estimating structural equation or path models.
On the other hand, advances in discrete choice modeling have led to several
alternatives to incorporate unobserved heterogeneity in choice models. Mixed logit
models allow estimated the parameters of an assumed distribution of estimated
parameters expressing the marginal effects of attribute differences on choice probabilities
(McFadden and Train, 2000). Similarly, latent class choice models identify latent segments
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of the population (Boxall and Adamowicz, 2002), exhibiting different utility functions or
even different decision rules (Hess and Stathopoulos, 2013; Kim et al., 2016). These
approaches have also been combined (Hensher, et al., 2013).
To the best of our knowledge, transportation researchers have not formulated
models that include heterogeneity into structural equation or path models. Rather, a
single structural model is estimated, which is assumed to apply to all respondents (of a
particular socio-demographic profile and a set of personality traits). Thus, the analytical
power of researchers would be enhanced if latent class structural equation models would
become an integral part of the set of models that can be used in travel satisfaction
research.
The aim of this analysis therefore is to formulate and estimate such a latent class
structural equation model. It assumes that the co-dependent relationships between travel
satisfaction and social well-being vary between latent classes. In that sense, the latent
class structural equations is similar in idea to the latent class models that have been
widely applied in transportation research. Latent classes are identified that differ in terms
of the parameters of the kind of model that is estimated.
6.5.1 Conceptual framework
In this section, we model the socio-demographic indicators and personality traits as a
categorical latent variable to investigate heterogeneity in the relationship between domain
satisfaction and subjective well-being by employing a latent categorisation approach
within a SEM framework. This approach goes beyond the methods using continuous latent
variables, it imposes the assumption that there are certain numbers of latent segments
among individuals. In our study, we assumed the latent class variable is influenced by
some indicators such as socio-demographic characteristics and personality traits.
SEM is an approach that estimates direct and indirect effects between latent
concepts using qualitative causal assumptions. It requires a conceptual model, which
hypothesises causal effects, and then tests the model on specific data to determine how
valid the hypotheses are. A conceptual framework was adopted in this study to examine
the effects of domain satisfaction on overall life evaluation.
Figure 6-2 depicts the hypothetical model structure. We include the socio-
demographic characteristics and personality traits as the indicators of the latent variable
in the SEM.
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119
Domain Satisfaction
CIndicators
Overall Life Evaluation
Indicator 1
Indicator 2
Indicator 3
Indicator 4
Figure 6-2 Conceptual framework of LCSEM
Table 6-8 Average latent class probabilities for residents’ most likely latent
class membership (Row) by latent class (Column)
Class 1 Class 2
Class 1 membership 0.892 0.108
Class 2 membership 0.005 0.995
6.5.2 Model estimation results
The latent class structural equation model shown in Figure 6-2 is estimated. The models
are estimated by using the statistical software Mplus 7.31 (Muthén and Muthén, 2015).
We estimated the model incrementally increasing the number of classes. The two-class
solution gave the best interpretable results. The subsequent model with incorporate
effects of the class membership functions is estimated based on two classes. After
removing insignificant socio-demographic and personality variables, we got the final
model with results shown in Table 6-9. The model with two latent classes has an entropy
index of 0.965. This suggests that the latent classes are well defined. A cross-tabulation
of the most likely latent class membership (row) by latent class (column) in Table 6-8
corroborates the high entropy value.
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Table 6-9 Results of latent class structural equation model
Constrained
model Two classes model
Class 1 Class 2
Estimate P Estimate P Estimate P
Indicators
Overall life evaluation
In most ways my life is close to
my ideal. ** 0.789 0.000 0.845 0.000 0.778 0.000
The conditions of my life are
excellent. ** 0.805 0.000 0.742 0.000 0.771 0.000
I am extremely satisfied with my
life. ** 0.821 0.000 0.636 0.000 0.819 0.000
On which step of the ladder
would you say you personally
feel you stand at this time?
0.691 0.000 0.885 0.000 0.730 0.000
Direct influence
Domain satisfaction
Living standard 0.226*** 0.000 0.155 0.465 0.249*** 0.000
Health 0.014 0.591 0.455*** 0.000 -0.009 0.745
Achievements in life 0.243*** 0.000 -0.418 0.056 0.239*** 0.000
Personal relationships 0.022 0.417 0.014 0.908 0.057 0.055
Safety at home 0.039 0.129 0.484** 0.011 0.013 0.681
Safety out of home 0.050 0.073 -0.214 0.134 0.067** 0.027
Relationship with neighbors -0.014 0.581 -0.145 0.248 -0.017 0.520
Relationship with friends 0.000 0.989 0.563*** 0.000 0.020 0.538
Relationship with colleagues 0.035 0.208 -0.136 0.263 0.027 0.393
Future security 0.145*** 0.000 -0.119 0.560 0.144*** 0.000
The amount of time you do
what you like 0.145*** 0.000 -0.002 0.989 0.166*** 0.000
Quality of local environment 0.004 0.900 0.305*** 0.008 0.005 0.888
General travel experience 0.022 0.444 -0.247 0.062 0.045 0.142
Work 0.131*** 0.000 0.339*** 0.009 0.130*** 0.000
Categorical latent variable
Calm -- -0.231 0.015 -- --
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121
Constrained
model Two classes model
Class 1 Class 2
Estimate P Estimate P Estimate P
Indicators
Loglikelihood
H0 Value -10112.491 -9954.218
H0 Scaling Correction Factor for
MLR -- 1.4318
Information Criteria
AIC 20276.982 20002.437
BIC 20414.155 20250.402
Sample-Size Adjusted BIC 20331.562 20101.099
Classification Quality
Entropy -- 0.965
Chi-Square Test of Model Fit
Value 232.818 --
Degrees of Freedom 44 --
P-Value 0.0000 --
RMSEA 0.054 --
Probability RMSEA <=.05 0.135 --
CFI 0.948 --
TLI 0.929 --
SRMR 0.024 --
The estimation results of this latent class model are reported in Table 6-9. To
identify the additional insights of incorporating a categorical variable in the SEM model,
we compared the results from our new model with those from a constrained SEM where
the model parameters do not vary across the latent classes. Goodness of fit indicators
AIC, BIC and adjusted BIC decreases in the latent class model which indicated that the
latent class model performance better than the constrained model. The log likelihood of
the SEM is somewhat lower than that of the latent class model. The LCSEM estimation
shows that different segments of travelers are characterized by different effects of these
variables. In other words, the LCSEM estimation provides insights into the nature and
origin of the heterogeneity.
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Table 6-9 shows some of the coefficients of the direct relationships between
domain satisfaction and overall life evaluation are significant at the 5 per cent level. The
signs and magnitudes of these influences vary across the latent classes indicating that
there is significant unobserved heterogeneity on the evaluation of overall life evaluation
and life domain. It means that the two latent classes mainly differ in terms of the relative
importance of some variables. The effects of a calm personality on latent class 1 is -0.231.
It indicates the calm personality could be one of the causes of heterogeneity between
individuals.
From the results of constrained model, we found that satisfaction of living standard,
achievements in life, future security, the amount of time you do what you like and work
have significant effects on overall life evaluation. However, both in the constrained model
and in the latent class model, the effect of travel satisfaction on overall life evaluation is
not significant which is consistent with the conclusions in the previous section. As we can
see from the results of the latent class model, the signs and magnitudes of the coefficients,
the effects of domain satisfaction on overall life evaluation in each class are discriminatory.
This indicates the heterogeneity among the individuals is significant. In latent class one,
the effects of health (0.455), safety at home (0.484), relationship with friends (0.563),
environment (0.305), and work (0.339) on overall life evaluation are significant at the 5
per cent level. In latent class two, the effects of living standard (0.249), the achievements
in life (0.239), safety out of home (0.067), future security (0.144), the amount of time
you do what you like (0.166), and work (0.130) on overall life evaluation are significant
at 5 per cent level. Class one can be considered as people who more care about health,
environment and relationship with friends while class two are the ones more ego centric
people with putting importance on their individual satisfaction with respect to living
condition, life achievements, future security etc. Noticeably, the majority belong to class
two. The direct influence of work satisfaction on overall life evaluation in the latent class
1 (0.339) is stronger than which in the latent class 2 (0.130). Besides travel satisfaction,
some other domains also do not significantly affect overall life evaluation, for example
personal relationships, relationships with neighbors and relationships with colleagues.
6.6 Discussion and conclusions
Understanding the relationship between travel satisfaction and subjective well-being is
essential, not only because it fulfils a research gap, but also because it becomes
increasingly relevant to the policy and operations of transport. By recognizing segment
specific characteristics and different sensitivity to the evaluation of travel experiences,
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
123
effective strategies for different travelers can be made by transport companies or policy
makers.
The empirical results of this analysis show that travel satisfaction does not
significantly influence life evaluation, but life evaluation strongly influences travel
satisfaction. This may be a disappointing result in the sense it suggests daily travel is less
influential for subjective well-being than other domains such as work, health and personal
relationships. On the other hand, we would be surprised if a different result would have
been obtained.
This finding is not in line with selective earlier research. Even though some
empirical work studies the impact that transport may have on well-being (Archer et al.,
2013; Bergstad et al., 2011; de Groot and Steg, 2006; Delbosc, 2012; Delbosc and Currie,
2011a, 2011b, 2011c; Steg and Gifford, 2005), very little work has directly studied the
relationship between travel satisfaction and overall well-being. Despite the small body of
extant studies regarding the effect of travel satisfaction on overall well-being, some
studies have empirically demonstrated that travel well-being contributes to overall well-
being or quality of life. For example, Spinney et al. (2009) found significant association
between transport mobility benefits and quality of life. Bergstad et al. (2011) found the
effect of satisfaction with daily travel on affective and cognitive subjective well-being is
both direct and indirect. However, few studies treated subjective well-being as an
exogenous variable (Abou-Zeid and Ben-Akiva, 2011). Abou-Zeid and Ben-Akiva (2011)
found a positive impact of overall well-being on commute satisfaction, but the effect is
not significant.
Our study focused on general satisfaction with daily travel and thus extends the
knowledge derived from prior research on travel satisfaction, which focused on the
relationship between subjective well-being and types of trips, such as leisure trips (Sirgy
et al., 2011) and commute trips ( Mao et al., 2016; Olsson et al., 2013; Ye and Titheridge,
2016).
Personality traits are found to impact travel satisfaction in this study. The inclusion
of personality traits may in part explain our main finding, relative to other studies.
Moreover, only some socio-demographic variables are shown to affect travel satisfaction,
but only indirectly. For example, age and gender indirectly influence travel satisfaction
through self-disciplined personality.
Travel satisfaction is shown to affect satisfaction with other life domains such as
satisfaction with the amount of time you do what you like. This supplements previous
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findings that commute satisfaction has a positive and significant effect on work well-being
(Abou-Zeid and Ben-Akiva, 2011).
Finally, we use a latent class structural equation model to gain new insights into
the relationship between domain satisfaction and subjective well-being. The latent classes
are defined based on the personality traits, which provides the insights into their joint
influences upon domain satisfaction and subjective well-being. Results of a model without
latent classes serve as comparison. This analysis has revealed heterogeneity in the
relationship between evaluation of overall life and life domain.
However, several problems are worth considering in future research. In this
chapter, we measured the satisfaction of travel experiences, which is regarded as a life
domain. Future research could further investigate the relationship between satisfaction
of trip/trip stage and subjective well-being based on revealed data. Moreover, although
a range of personality items was tested in this study, it is also interesting to apply more
comprehensive measures for personality instead of the current six-item scales. This study
is only concerned with a city in China, it is worthwhile to repeat the experiment in different
cities and countries to better understanding any spatial, cultural differences in travel
satisfaction and subjective well-being.
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125
7
CONCLUSIONS AND FUTURE WORK
7.1 Summary
Despite extensive research on consumer satisfaction over the past decades, the study of
travel satisfaction has only recently been discussed in transportation research. The results
are used for supporting urban planners and transportation policy makers in their
endeavours to create transport strategies that enhance subjective well-being or helping
transportation providers to evaluate their service provision.
Previous studies mostly focused on the development of measurement methods
and the identification of correlates of travel satisfaction. However, most studies did not
consider the subjective correlates of travel satisfaction even though the effects of those
attributes are significant and cannot be ignored. Moreover, with the development of travel
behavior models and subjective psychology research, researchers try to better understand
the effects of travel satisfaction on subjective well-being or quality of life.
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126
The aim of this thesis is to enhance our understanding of travel satisfaction and
its correlation with subjective well-being, contributing to both modeling and data
collection challenges. Rather than the common focus on trips, it assumes that individuals’
responses to travel satisfaction are distinguished in the context of different trip attributes,
travel modes, and different trip stages. Therefore, a new survey was designed to collect
data about travel satisfaction on overall travel satisfaction, whole day travel satisfaction,
satisfaction for every trip and trip stage.
To explore the effects of both objective and subjective attributes on travel
satisfaction, both a path model and a reference-based model was developed and applied.
Chapter 4 aimed at exploring the effects of objective and subjective attributes of vehicles
and trips on trip stage satisfaction. The empirical results of the path analysis provided
evidence that subjective factors such as mood, and personality traits have significant
effects on trip stage satisfaction. Moreover, contrasted with the state of the art in travel
behavior research, which is almost invariantly based on linear regression and structural
equations analysis, we explored the performance of non-linear models of trip satisfaction.
We assumed that trip satisfaction systematically varies in a non-linear fashion with the
discrepancy between expectations and actual experienced attributes of the trip. We
developed a reference-based model of trip satisfaction that takes perceived service quality,
attitudes, moods, personality traits and indifference tolerance into account. Results
support the contentions underlying the study: several relationships between attributes
and satisfaction appear non-linear. There is also evidence of indifference tolerance, but
results differ between attributes.
However, these results are limited by the fact that we only focus on the trip stage
satisfaction. Requesting respondents to provide satisfaction ratings for multi-stage trips
or daily travel experiences implies they have to value each stage respectively based on
memory recall and then cognitively integrate these judgments into the requested
satisfaction rating of trip or whole day trip experience. Our knowledge about the
prevalence of alternate processing rules that may be used to arrive at trip satisfaction
ratings is very limited. Research on this topic in travel behavior analysis is very scarce. In
contributing to the research on travel satisfaction related to public transport, chapter 5
compares the performance of different processing rules using data on satisfaction with
public transport trips from Xian, China. Based on the results of chapter 5, we found the
popular peak-end rule, except for the disjunctive rule, consistently had the lowest
explained variance, also after controlling for socio-demographics, mood and personality
traits. Rather, for all estimated models, the conjunctive processing rule had the highest
associated explained variance. It suggests that the episode respectively trip with the
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
127
lowest satisfaction dominates overall satisfaction. Second, we also did not find much
evidence of a recency effect. Rather, the satisfaction of the first trip or stage has higher
marginal effects on overall satisfaction than more recent trips or stages.
Chapters 4 and 5 analyzed travel satisfaction of trip stage level, trip level and even
day level, the correlates which affect them, and the correlations with each other. Chapter
6 shifted the focus of attention from trip or trip stage satisfaction to individuals’
satisfaction of travel as a specific domain and their relationships with subjective well-
being. In Chapter 6, the question to what extent subjective well-being or life satisfaction
is influenced by travel satisfaction will be addressed. To identify the relative importance
of travel satisfaction to subjective well-being, we collected data about overall life
satisfaction, life evaluation, eudaimonic well-being and satisfaction in various other life
domains, reflecting the notion that the relationship between travel satisfaction and
subjective well-being may also be influenced by satisfaction related to other domains.
This specific focus and coverage differentiates the present study from earlier work. A
structural equation model was estimated to find the direct and indirect relationships
between domain-specific well-being, including travel satisfaction, and subjective well-
being. Socio-demographic variables and the personality of individuals were considered to
investigate their influence on travel satisfaction and subjective well-being.
In addition, in order to investigate heterogeneity in the relationship between travel
satisfaction and subjective well-being, a latent class structural equation model of the
relationships between travel satisfaction, overall life satisfaction and eudaimonic well-
being is estimated to identify heterogeneous segments of respondents, controlling for the
effects of personality traits on the latent variables in Chapter 6. The results indicate that
the effects of travel satisfaction on overall life satisfaction and eudaimonic well-being are
significant. The calm personality can be identified as the indicator of latent categories
that relate to people’s evolution of life and travel experiences. The influence of travel
satisfaction on eudaimonic well-being and the influence of eudaimonic well-being on
overall life satisfaction differ across travelers.
7.2 Contributions
The research contributes to a better understanding of travel satisfaction in a travel
behavior modeling perspective. To the best of our knowledge, this is the first attempt to
explore the interrelationships between travel satisfaction, trip attributes, mood,
personality, service quality and subjective well-being systematically. Several studies in
travel behavior research have only investigated the relationships between two or three of
Chapter 7
128
these concepts (e.g., Ory and Mokhtarian, 2005; Steel et al., 2008; Morris and Guerra,
2015). First of all, we analyze the effects of trip attributes on travel satisfaction
simultaneously considering the effects of the moods and personality traits by estimating
a path model. The empirical results of this study provide tenable evidence that the
proposed model is acceptable. The main findings of this study suggest that mood directly
influences travel satisfaction, while the effects of personality are both direct and indirect.
Secondly, in this study, we developed a model of the impact of differences
between expected and experienced trip attributes on trip stages satisfaction using
polynomial regression models, controlling for perceived service quality, attitudes, moods,
personality traits and socio-demographic characteristics of respondents. The contributions
are (i) we included customer expectations in the analysis of travel satisfaction, controlling
for perceived service quality, attitude, mood, personality traits and socio-demographic
characteristics; (ii) we applied a polynomial regression model to avoid making a priori
assumptions about the form of the satisfaction function; (iii) we investigated the existence
of a tolerance range reflecting people’s sensitivity to gaps between experiences and
expectations when evaluating their travel experience. Results support the potential value
of incorporating these ideas into travel satisfaction analyzes. The major advantage of
using the polynomial form is that the researcher does not need to a priori decide on the
form of the satisfaction function. Linearity/non-linearity, convexity/concavity and
tolerance are now the result of the estimated cubic function. It should be mentioned in
this context that of course there is always an element of personal judgment and
interpretation of the result.
Thirdly, this research makes a contribution to the literature by providing insights
into the processing rules that best capture the process of articulation of travel satisfaction.
With that motivation this research compared the predictive performance of different
processing rules that represent how travelers arrive at overall travel satisfaction ratings.
Rather than focusing specifically on the theoretical foundations underlying this prior
research, we take a broader perspective and also consider rules that are founded on other
theories.
Fourthly, this study was one of the first of its kind and scope in China conducted
to better understand the relationship between travel satisfaction and subjective well-
being. Taking a more comprehensive perspective than typical previous studies on this
topic in transportation research, this study (i) includes both hedonic and eudaimonic view
of subjective well-being; (ii) allows for mutual dependency between travel satisfaction
and subjective well-being; (iii) acknowledges that subjective well-being is influenced by
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
129
people’s interdependent satisfactions with different domains of life; and (iv) allows for
possible influence of personality traits on satisfaction ratings. Furthermore, a latent class
structural equation model of the relationship between travel satisfaction, overall life
satisfaction and eudaimonic well-being is estimated to identify heterogeneous segments
of respondents, controlling for the effects of personality traits on the latent variables.
7.3 Limitations
The conclusions of this study are directly linked to the decisions we made in the beginning
of designing the study. Most of the study limitations relate to the data, assumptions
related to the data collection and our choice of method of analysis. In that sense, our
study is not free of limitations.
Starting with the easy potential limitations associated with retrospective surveys,
some typical errors and biases could be generated. As real-time data is difficult to collect,
we used a retrospective measurement to collect travel satisfaction data. However, studies
have shown that retrospective data can be useful if carefully collected. In order to reduce
errors, the survey was carefully designed and administrated with the aim of reducing
respondent burden, focusing on the whole day travel experiences closest to the time
when answering the questions. Several rounds of pilot testing were organized and
feedback reports from respondents and academics were taken into account to improve
the design. Although we attempted to ensure the responses have better consistency and
as few errors as possible, it is likely there are errors and memory biases when reporting
all the detailed information of trips because of the long questionnaire. Real-time data of
travel satisfaction could be more precise and reduce measurement bias.
Another potential limitation of the current study are the limited measurement
methods used in travel satisfaction, subjective well-being, mood, and personality traits.
Our analyzes are only based on selected scales and limited items used in the survey.
The results of this study are further limited by the fact that the data used only
allow cross-sectional analysis. Potential variables such as environmental conditions,
weather condition may affect travel satisfaction. The systematic analysis of these
additional effects ideally requires panel data and a dedicated sampling of days to
systematically vary environmental conditions and weather conditions. Panel data would
also have the advantage of additional intra-personal variability in mood and travel
experience, allowing more sophisticated analysis. There are some other potential
variables which may affect travel satisfaction such as built environment attributes,
Chapter 7
130
departure frequency, traffic control, the information system and other facilities could be
considered in the future analysis.
Lastly, this study is only concerned with a single city in China, and therefore these
data do not reflect any general differences.
7.4 Future research
In recent decades, researchers have addressed several aspects of the influence on travel
satisfaction and subjective well-being, such as travel time, service attributes, congestion
and socio-demographics, etc. However, it is a long way to completely understand travel
satisfaction and subjective well-being. The research presented in this thesis also raised
some further questions concerning the results of these studies. There are several possible
lines of research arising from this work.
First, the limitations of retrospective measurement of travel satisfaction data
require collecting new kinds of data. It may be more valid to collect observations during
actual travel using modern technology such as mobile phone apps. This is not meant to
say that such experience sampling is errorless. However, it would be of great interest to
compare the validity and reliability of retrospective measurement and experience
sampling in future research.
A big challenge of investigating travel satisfaction is obtaining the panel data as
the travel satisfaction data we collected pertain to a particular day. To get a good
impression of the heterogeneity of trips, it is desirable to collect longitudinal diary data.
While cross-sectional travel diary surveys are useful in determining the overall average
travel behavior of the regional population, they do not capture repetitive patterns in travel
activities. New technologies and use of smartphones may provide a promising way of
collecting longitudinal travel data. For instance, a dynamic analysis could be conducted
to explore whether mood changes over time co-vary with differences in travel satisfaction.
This study focuses on the effects of mood, personality traits on travel satisfaction.
Particularly, nine items representing mood and six items representing personality have
been analyzed in this research project. More comprehensive measurement methods and
scales can be used to collect the relevant information.
In addition, the study of travel satisfaction and subjective well-being in this study
concern general travel satisfaction and its relationship with subjective well-being. Further
research should explore the relationship between trip/stage satisfaction and subjective
well-being. Furthermore, this research mainly discusses the cognitive aspect of subjective
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
131
well-being. Affective or emotional aspects of subjective well-being can be added in future
studies.
A further challenge is to link travel satisfaction to travel behavior such as modal
choice behavior and residential location selection. Although this topic has been studied
recently, newly emerging travel modes, as well as the changing built environment, will
affect daily transport mode choice, making additional research necessary.
Finally, further investigation of travel satisfaction in different cities and countries
is necessary to better understand any spatial, cultural and wealth differences in travel
satisfaction and its relative influence on subjective well-being.
133
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149
Author Index
A
Abdallah, S., 35
Abenoza, R. F., 11, 57, 59, 78, 100
Abou-Zeid, M., 3, 4, 7, 8, 11, 17, 19, 22,
24, 35, 36, 39, 45, 57, 78, 100, 104,
123, 124
Adamowicz, W. L., 118
Agnihotri, R., 3
Anderson, E. R., 3
Anderson, E. W., 3
Anderson, J. C., 9
Anderson, N. H., 82
Andrews, F. M., 19
Archer, M., 22, 78, 123
Aydin, N., 3
B
Ben-Akiva, M., 22, 24, 35, 78, 100, 104,
117, 123, 124
Benitez, F. G., 78
Bergkvist, L., 9
Bergstad, C. J., 3, 9, 20-22, 25, 35, 36,
47, 78, 103, 123
Berry, L. L., 57
Besta, T., 13
Boxall, P. C., 118
Brakewood, C., 44
C
Cameron, P., 47
Campbell, A., 2
Cantril, H., 19
Cantwell, M., 35, 57
Cao, J., 11, 16-18, 39, 40, 58, 78
Carrel, A., 10, 11, 17, 38-40, 75
Cats, O., 3, 4, 7, 11, 14, 16, 17, 36, 38,
40, 44, 57, 59
Chekola, M. G., 2
Chen, C. F., 9, 16, 30, 38, 39, 78
Churchill Jr, G. A., 3, 9, 57
Clore, G. L., 44
Conley, J. J., 46
Cooper, H., 4, 36, 104
Costa, P. T., 17, 40, 45, 103
Culberson, C. E., 2
Currie, G., 22, 78, 123
D
Dasgupta, S. K., 100
de Groot, J., 123
de Oña, J., 16, 38, 39, 78
De Vos, J., 4, 7, 8, 10, 12, 17-19, 20,
35-37, 40, 41, 57, 58, 75, 78, 100,
105
Deci, E. L., 19, 20, 102
Del Castillo, J. M., 78
Delbosc, A., 22, 123
Dell’Olio, L., 78
DeNeve, K. M., 4, 36, 103
Diamantopoulos, A., 9
Diana, M., 22, 78
Diener, E., 1, 2, 4, 9, 17-20, 24, 36, 40,
45, 99-103
Duarte, A., 4, 36
Dupuy, H. J., 19
150
E
Eboli, L., 78
Edvardsson, B., 78
Einhorn, H. J., 83
El-Geneidy, A. M., 16, 39
Estes, D., 20
Ettema, D. F., 3, 7, 8, 11, 12, 16-18, 20,
21, 23, 25, 35, 39, 40, 44, 45, 57-59,
77-79, 103
Evans, G. W., 45
F
Fellesson, M., 78
Finn, A., 60
Fornell, C., 3
Friman, M., 3, 7, 8, 12, 44, 45, 78
Fu, X., 12
Fujii, S., 7, 11, 22, 35, 57, 78
Fujita, F., 46, 101
G
Gärling, T., 7, 8, 19, 20, 102
Gatersleben, B., 8
Gerbing, D. W., 9
Gifford, R., 123
Gilliland, K., 46
Gonzalez, O. I., 8
Gosling, S. D., 29, 49, 106
Grzeskowiak, S., 100
Guerra, E., 36, 45, 128
Gurin, G., 19
H
Hansson, E., 21, 25, 103
Haws, K. L., 9
Hayborn, D. M., 2
Headey, B., 24, 100, 103
Hennessy, D. A., 46
Hensher, D. A., 9, 118
Hess, S., 118
Higgins, C. D., 10, 13, 17, 18, 37, 40
Hine, J., 13, 16, 38, 39, 59
Hussain, R., 4, 36
I
Ilies, R., 46
Ingersoll-Dayton, B., 20
International Well-being Group, 20
J
Jacoby, J., 9
Jaśkiewicz, M., 13
Jones, H. M., 2
Juan, Z., 12
Judge, T. A., 46
K
Kahneman, D., 7, 19, 44, 79, 81, 97, 99,
102
Kano, N., 60
Kelly, E. L., 46
Kim, J., 117, 118
Koslowsky, M., 45
Krueger, A. B., 44
Kwon, H., 9,
L
Lai, W. T., 9, 16, 30, 39, 78
Li, Z., 44
Lin, W. B., 3
Lucas, R. E., 46, 101, 103
M
Mahmoud, M., 13, 16, 38, 39, 59
Majumdar, S., 100
Manaugh, K., 16, 39
Mao, Z., 13, 123
151
Martin, A., 21, 25, 103
Matthews, B. P., 3
Matthews, G., 46
Mazzulla, G., 78
McCrae, R. R., 17, 40, 45, 103
McFadden, D., 117
McMahan, E. A., 20
Miller, J. A., 57
Mohan-Neill, S. I., 100
Mokhtarian, P. L., 7, 17, 23, 36, 39, 57,
104, 128
Morris, E. A., 36, 45, 128
Mouwen, A., 3, 7, 13, 16, 38
Muthén, B. O., 52, 119
Muthén, L. K., 52, 119
N
Neugarten, B. L., 19
Novaco, R. W., 8, 45
O
Oishi, S., 100
Oliver, R. L., 3, 19
Olsson, L. E., 8, 23, 35, 44, 123
Ory, D. T., 7, 17, 23, 36, 39, 57, 104,
128
P
Parasuraman, A., 57
Parker, C., 3
Pavot, W., 9, 19, 20, 102
Perović, Đ., 47
Peterson, R. T., 3
Petrick, J. F., 16, 38
Pitt, M., 3
R
Rasouli, S., 44, 79, 82
Ravulaparthy, S., 23, 78
Reardon, L., 35
Reis, E., 78
Richard, E., 17, 40, 45, 46, 101
Rittichainuwat, B. N., 46
Rossiter, J. R., 9
Ryan, R. M., 19, 20, 102
Ryff, C. D., 20, 102, 103
S
Schimmack, U., 19
Schmutte, P. S., 103
Schwarz, N., 44
Singer, B. H., 20
Sirgy, M. J., 21, 24, 25, 100, 102, 103,
123
Spinney, J. E., 23, 78, 123
Stanley, J., 20, 23
Stathopoulos, A., 118
Steel, P., 17, 36, 40, 45, 46, 101, 128
Steg, L., 123
St-Louis, E., 3, 4, 9, 13, 17, 18, 36, 37,
40, 57
Stradling, S. G., 3
Suh, E., 17, 40, 99
Sullivan, M. W., 3
Sumaedi, S., 78
Surprenant, C., 3
Susilo, Y. O., 3, 4, 7, 14, 17, 36, 40, 44,
57, 78
Suzuki, H., 44, 79, 86, 97
T
Tatarkiewicz, W., 2
Timmermans, H. J. P., 44, 79, 82
Tirachini, A., 44
Titheridge, H., 15, 17, 39, 58, 123
Trail, G., 9
Train, K., 117
U
152
Uzzell, D., 8
V
Van Rooy, D. L., 7
Västfjäll, D., 8, 19, 20, 102
Vicente, P., 78
W
Wan, D., 14-16, 38, 58
Waterman, A. S., 20, 102
Watson, D., 19, 20, 102
Wener, R. E., 7, 45
Wessman, A. E., 2
Westman, J., 15
Wiesenthal, D. L., 46
Wilson, W. R., 2
Wirtz, J., 3
Withey, S. B., 19
Witlox, F., 7
Wu, J., 78
X
Xiong, B., 3
Y
Yang, M., 7, 10, 15, 17, 37, 40, 59, 100
Yang, Z., 3
Ye, R., 15, 17, 39, 58, 123
Z
Zajenkowski, M., 46
Zhang, C., 10, 15, 37
153
Subject Index
A
Activity, 18, 22, 28, 30, 41, 43, 79, 97
Affective well-being, 3
C
Cognitive well-being, 3
Conjunctive Rule, 11, 83, 87, 92
Correlation, 9, 10, 13, 22, 29, 31, 43, 46,
47, 48, 52, 53, 86-89, 92-94, 101,
104, 108, 11, 126, 127
Cost, 5, 9, 10,12, 28, 30, 37, 38, 43, 49,
50, 53, 55, 56, 59, 64-67, 75
D
Data, 5, 8, 16, 24, 26-29, 31, 33, 39, 42,
43, 48-50, 52, 64, 74, 79, 80, 86, 87,
91, 97, 100, 103, 104, 124, 126, 127,
129, 130
Delighted-Terrible Scale, 19
Disjunctive Rule, 11, 82, 84, 97, 126
Duration-weighted Averaging Rule, 86,
87, 89, 91-94, 96
E
Equal-weight Averaging Rule, 86, 87, 89,
91, 92, 94, 96
Eudaimonic well-being, 19, 20, 24, 25,
28, 31, 102-106, 115-117, 127, 129
G
General Well-being Schedule, 19
Gurin scale, 19
H
Hedonic well-being, 19, 20, 24, 102, 115
Heterogeneity, 5, 18, 41, 80, 117, 121,
122, 124, 127, 130
Household, 28, 29, 32, 33, 47, 50-52, 63,
64, 67-69, 75, 85, 104, 107, 108
L
Latent class, 6, 101, 102, 117-122, 124,
127, 129
Latent variable, 52, 109-111, 115, 118,
120, 127, 129
Life satisfaciton, 2, 3, 19, 21, 23, 24, 28,
31, 99, 100, 102-106, 108, 115, 116,
127, 129
Limitations, 6, 33, 101, 129, 130
M
Mood, 2-4, 11, 14-17, 22, 23, 28, 30, 31,
37, 39, 41-47, 49, 50, 52, 54, 55, 57,
58, 60, 61, 65, 66, 68, 69, 74-76, 88,
86, 88-97, 99, 104, 105, 126-130
Multi-item scales, 8, 9,19
O
Observations, 32, 52, 59, 107, 130
P
Path model, 37, 50, 52, 117, 118, 126,
128
154
Peak-end Rule, 79, 86-89, 91-94, 96, 97,
126
Personality, 4, 16-18, 22, 23, 28, 29, 31,
33, 36, 37, 39-42, 44-47, 49, 50, 52,
54, 55, 57, 58, 60, 61, 65, 66, 68-70,
74-76, 80, 86, 88-97, 101, 103, 104,
106, 108, 113-119, 122-124, 126-
130
Positive and Negative Affect Scale, 19,
20, 102
Public transport, 3, 7-13, 15, 16, 22, 29,
30, 36-38, 44, 49, 53-56, 63, 166,
68-70, 74, 75, 78, 80, 84, 96, 97,
126
R
Reference-based model, 5, 57, 58, 126
S
Satisfaction with Life Scale, 9, 19, 20,
102
Satisfaction with Travel Scale, 8, 20
Self-anchoring ladder, 19
Service quality, 10-12, 14-16, 27, 28, 30,
36, 38, 39, 55, 60, 61, 65, 66, 68-70,
74-76, 96, 104, 126-128
Single-item scales, 8, 9, 33, 50, 106
Structural equation model, 5, 12, 14, 15,
58, 101, 108, 114, 115, 117-120,
124, 127, 129
Subjective well-being, 2-5, 8, 11, 14,
17-28, 31, 33, 35, 36, 40, 45, 46, 77,
78, 99-105, 108, 109, 112-118, 122-
131
Summation Rule, 86, 87, 89, 91-94, 96
Swedish Core Affect Scales, 8, 19, 20,
102
T
Transport mode, 10, 12, 30, 38, 73, 104,
131
Travel behavior, 3, 4, 10, 18, 21, 22, 25,
38, 41, 47, 57-59, 97, 100, 101, 103,
108, 125-127, 130, 131
Travel satisfaction, 3-5, 7-18, 21-30, 33,
35-41, 43-50, 52, 54-59, 74-81, 86,
91-97, 99-103, 106, 108, 114-116,
118, 122-131
Travel time, 5, 9, 10, 13, 17, 37-39, 43,
45, 49, 50, 59, 130
Trip attributes, 4, 9, 10, 27, 28, 30, 31,
36-38, 41, 43-45, 47, 49, 50, 52, 54,
55, 58, 59, 71, 74, 105, 126-128
Trip stage, 5, 16, 21, 23, 24, 28, 30, 31,
35, 39, 41-44, 47-50, 52, 54, 57, 63-
67, 69-71, 73, 75, 80-86, 88, 91, 92,
96, 97, 105, 124, 126-128
U
Utility, 10, 19, 38, 99, 117, 118
155
Summary
Travel Satisfaction and Subjective Well-Being: A Behavioral Modeling Perspective
Since the emergence of the subjective well-being studies now over six decades ago, the
study of domain satisfaction has progressed rapidly especially in social science and
marketing research. As an essential domain of human’s life, travel satisfaction has
recently become a popular topic in travel behavior research. A better understanding of
travel satisfaction and its determinants is highly instrumental in optimizing service delivery
and guiding transport policy. The strong dependence of travel behavior models on
objective factors, without systematic consideration of other subjective factors, motivated
us to consider the effects of subjective factors on travel satisfaction. The fact that daily
trips become more complex provided another motivation for the study of the relationship
between satisfactions in different context. As subjective well-being is a multi-dimensional
concept that covers many life domains, travel satisfaction contributes to subjective well-
being and vice-versa subjective well-being also influences travel satisfaction. Thus,
understanding the relationship between travel satisfaction and subjective well-being is
the main objective of this dissertation.
The thesis aims at developing our understanding of the concept of subjective well-being,
measurement methods and determinants of travel satisfaction and subjective well-being.
The current literature comprises a variety of conceptualizations and interpretations of
travel satisfaction and subjective well-being. In order to assess the collective
understanding of both concepts, a systematic literature review of travel satisfaction and
subjective well-being in terms of definitions, measurements and main determinants was
conducted. The insights from this systematic literature reviews provide the theoretical
basis for the empirical analyzes in this dissertation, which lead to main findings and
implications that are of scientific value for scholars and provide valuable insights for
governments and transport companies.
156
Based on the theoretical framework, a path model of travel satisfaction, trip attributes,
moods and personality traits was proposed in simultaneously analyzes of the effects of
objective and subjective attributes of vehicles and trip stages on travel satisfaction. The
proposed framework considered the trip stage level as the trip attributes. A limitation of
this approach, which follows the state-of-the-art in transportation, is that satisfaction is
assumed a linear function of the attributes of the choice alternatives. Therefore, we test
models that assume that trip satisfaction systematically varies in a non-linear fashion as
a function of the discrepancy between expectations and actual experienced attributes of
the trip stage. This analysis formulates and estimates a reference-based model of trip
satisfaction that takes attitude, mood, personality, service quality and indifference
tolerance into account. Estimation results indicate that the difference between expected
and experienced waiting time, in-vehicle time, experienced cost, perceived service quality,
attitude, mood, personality and socio-demographic characteristics have significant effects
on trip stage satisfaction. Findings also indicate that respondents tolerate minor
differences in access time.
Another potential limitation of the state-of-the-art research on travel satisfaction assumes
that satisfaction ratings in multi-trip, multi-stage and multi-attribute travel experiences
follow simple aggregation rules. In contrast, we examine a set of alternative processing
rules that differ in terms of the nature of the underlying decision process and allow
investigating recency effects. We found that the peak-end rule was not supported by our
data. Second, we found that satisfaction of the first trip and first trip stage have higher
marginal effects on overall satisfaction than more recent trips and stages.
Finally, prior studies suggest that an understanding of how domain satisfaction
contributes to overall well-being and how overall well-being influences domain satisfaction
is still an open question. We examine the mutual dependency between travel satisfaction
and subjective well-being relative to satisfaction with other life domains, while controlling
for personality traits and selected socio-demographic variables using a structural equation
model. The empirical results of this analysis show that travel satisfaction does not
significantly influence life evaluation, but life evaluation strongly influences travel
satisfaction. Another contribution is a latent class structural equation model was examined
to gain new insights into the co-dependent relationships between domain satisfaction and
subjective well-being. This analysis has revealed heterogeneity in the relationship
between evaluation of overall life and life domains.
157
The data used in this study were collected in January 2015 in Xi’an, China among a
random sample of respondents. The questionnaire involved questions about the
characteristics of a full day of travel, expressed travel satisfaction for the full day, every
trip, and every stage, perceived service quality of travel mode, plus questions about
travelers’ attitude, mood, personality trait, and socio-demographic characteristics.
This dissertation contributes to a shift in focus from objective correlates of travel
satisfaction to subjective correlates, from evaluation of indistinct travel experience to
satisfaction of specific day/trip/stage. To the best of our knowledge, this is the first
attempt to explore the subjective correlates of travel satisfaction, different aggregation
rules of travel satisfaction, and the relationship between travel satisfaction and subjective
well-being, in a comprehensive framework. In the context of policy formulation and
practical application, this dissertation contributes to shaping and appraising transport and
social policy.
159
Curriculum Vitae
Yanan Gao was born on 28-06-1989 in Shaanxi, China. She obtained her bachelor degree
in Traffic Engineering at Chang’an University in 2010. She graduated with honours and
continued her master study in Traffic Engineering at Chang’an University. During her
master education, she received National Scholarships for Graduate Students. She focused
on research on public transport, built environment and commute carbon emissions. She
obtained her master degree in 2013.
She became a PhD candidate recommended for admission in Transportation
Planning and Management at Chang’an University in 2012. From September 2013, she
became a joint PhD student of Chang’an University and Eindhoven University of
Technology and started a PhD project at the Urban Planning Group of Eindhoven
University of Technology in the Netherlands under the support from the China Scholarship
Council. Since September 2015, she continued her research at Chang’an University in
China. Her research project focused on travel satisfaction and subjective well-being. The
objectives of her research are to explore the relationship between domain satisfaction,
eudaimonic well-being, life evaluation, personalities and overall life satisfaction, and to
examine factors such as trip attributes, mood, and personality traits. Her publications
have appeared in Transportation Research Part F and Travel Behaviour and Society.
160
List of Publications
Journal articles:
Gao, Y., Rasouli, S., Timmermans, H.J.P., & Wang, Y. (2018). A reference-based model
of trip stage satisfaction incorporating trip attributes, perceived service quality,
psychological disposition and indifference tolerance. Transportation Research Part
A: Police and Practice. (Under review)
Gao, Y., Rasouli, S., Timmermans, H., & Wang, Y. (2017). Understanding the relationship
between travel satisfaction and subjective well-being considering the role of
personality traits: a structural equation model. Transportation Research Part F:
Traffic Psychology and Behaviour, 49, 110-123.
Gao, Y., Rasouli, S., Timmermans, H.J.P., & Wang, Y. (2017). Effects of traveller’s mood
and personality on ratings of satisfaction with daily trip stages. Travel Behaviour and
Society, 7, 1-11.
Wang, Y., Li, Z., & Gao, Y. (2015). Minimum revenue guarantee and toll revenue cap
optimization for ppp highways: Pareto optimal state approach. Baltic Journal of Road
& Bridge Engineering, 10(4), 365-371.
Wang, Y., Wang, Z., Li, Z., Staley, S. R., Moore, A. T., & Gao, Y. (2012). Study of modal
shifts to bus rapid transit in Chinese cities. Journal of Transportation Engineering,
139(5), 515-523.
Book chapters:
Gao, Y. (2014) Study of urban neighborhood household commute carbon emissions,
Chapter 8, pp. 164-181. In: Wang, Y., Han S., & Liu, Y. (eds.), Low carbon Xi’an
Research. Xi’an Jiaotong University Press.
Gao, Y., Ma, J., & Wang, Z. (2018) Trip generation. In: Wang, Y., & Ma, S. (eds.),
Transportation Planning. Beijing Jiaotong Press (In press).
Gao, Y., Zhang, J., & Wu, R. (2018) Trip distribution models. In: Wang, Y., & Ma, S.
(eds.), Transportation Planning. Beijing Jiaotong Press (In press).
161
Gao, Y., Yu, Z., Li, D., & Zhu, L. (2018) Modal split models. In: Wang, Y., & Ma, S. (eds.),
Transportation Planning. Beijing Jiaotong Press (In press).
Gao, Y., & Yang, X. (2018) Traffic Assignment. In: Wang, Y., & Ma, S. (eds.),
Transportation Planning. Beijing Jiaotong Press (In press).
Conference Proceedings and Presentations:
Gao, Y., Rasouli, S., Timmermans, H., & Wang, Y. (2017). A study of the relationship
between subjective well-being and travel satisfaction. In: Proceedings of 95th
Annual Meeting of TRB, Washington, DC.
Gao, Y., Rasouli, S., Timmermans, H., & Wang, Y. (2016). Mode-switching intentions of
public transport users: the influence of perceived service quality, travel satisfaction
and psychological disposition. In: Proceedings of the 21th International Conference
of HKSTS, Hong Kong.
Gao, Y., Rasouli, S., Timmermans, H., & Wang, Y. (2015). A study of the relationship
between subjective well-being and travel satisfaction. In: S. Rasouli and H.J.P.
Timmermans (eds.), Proceedings of 2015 BIVEC-GIBET Transport Research Day,
Eindhoven.
Gao, Y., Rasouli, S., Timmermans, H., & Wang, Y. (2015). Analyzing effects of personality
and mood on travel satisfaction: A path analysis model. In: Proceedings of the 20th
International Conference of HKSTS, Hong Kong.
Gao, Y., Rasouli, S., Timmermans, H., & Wang, Y. (2014). Motives underlying intentions
to buy a car: Simultaneous probit selection-Multinomial logit choice model. In:
Proceedings of the 19th International Conference of HKSTS, Hong Kong.
Gao, Y., Rasouli, S., Timmermans, H., & Wang, Y. (2014). Reasons for not buying a car:
A probit selection multinomial logit choice model. In: Proceedings of 12th
International Conference on Design and Decision.
Wang, Y., Gao, Y., Wang, Z., Staley, S. R., Moore, A. T., & Li, Z. (2011). The impact of
bus rapid transit development on travel choices in Chinese Cities. In: Proceedings
of the 16th International Conference of HKSTS, Hong Kong.
Wang, Y., Wang, Z., Li, Z., Staley, S. R., Moore, A. T. & Gao, Y. (2012) A study of modal
shifts to bus rapid transit in Chinese cities. In: Proceedings of 90th Annual Meeting
of TRB, Washington, DC.
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nr 160'Village in the City' in Guangzhou, ChinaYanliu Lin
nr 161Climate Risk Assessment in MuseumsMarco Martens
nr 162Social Activity-Travel PatternsPauline van den Berg
nr 163Sound Concentration Caused by Curved SurfacesMartijn Vercammen
nr 164Design of Environmentally Friendly Calcium Sulfate-Based Building Materials: Towards an Improved Indoor Air QualityQingliang Yu
nr 165Beyond Uniform Thermal Comfort on the Effects of Non-Uniformity and Individual PhysiologyLisje Schellen
nr 166Sustainable Residential DistrictsGaby Abdalla
nr 167Towards a Performance Assessment Methodology using Computational Simulation for Air Distribution System Designs in Operating RoomsMônica do Amaral Melhado
nr 168Strategic Decision Modeling in Brownfield RedevelopmentBrano Glumac
nr 169Pamela: A Parking Analysis Model for Predicting Effects in Local AreasPeter van der Waerden
nr 170A Vision Driven Wayfinding Simulation-System Based on the Architectural Features Perceived in the Office EnvironmentQunli Chen
nr 171Measuring Mental Representations Underlying Activity-Travel ChoicesOliver Horeni
nr 172Modelling the Effects of Social Networks on Activity and Travel BehaviourNicole Ronald
nr 173Uncertainty Propagation and Sensitivity Analysis Techniques in Building Performance Simulation to Support Conceptual Building and System DesignChristian Struck
nr 174Numerical Modeling of Micro-Scale Wind-Induced Pollutant Dispersion in the Built EnvironmentPierre Gousseau
nr 175Modeling Recreation Choices over the Family LifecycleAnna Beatriz Grigolon
nr 176Experimental and Numerical Analysis of Mixing Ventilation at Laminar, Transitional and Turbulent Slot Reynolds NumbersTwan van Hooff
nr 177Collaborative Design Support:Workshops to Stimulate Interaction and Knowledge Exchange Between PractitionersEmile M.C.J. Quanjel
nr 178Future-Proof Platforms for Aging-in-PlaceMichiel Brink
nr 179Motivate: A Context-Aware Mobile Application forPhysical Activity PromotionYuzhong Lin
nr 180Experience the City:Analysis of Space-Time Behaviour and Spatial Learning Anastasia Moiseeva
nr 181Unbonded Post-Tensioned Shear Walls of Calcium Silicate Element MasonryLex van der Meer
nr 182Construction and Demolition Waste Recycling into Innovative Building Materials for Sustainable Construction in TanzaniaMwita M. Sabai
nr 183Durability of Concretewith Emphasis on Chloride MigrationPrzemys�aw Spiesz
nr 184Computational Modeling of Urban Wind Flow and Natural Ventilation Potential of Buildings Rubina Ramponi
nr 185A Distributed Dynamic Simulation Mechanism for Buildings Automation and Control SystemsAzzedine Yahiaoui
nr 186Modeling Cognitive Learning of UrbanNetworks in Daily Activity-Travel BehaviorSehnaz Cenani Durmazoglu
nr 187Functionality and Adaptability of Design Solutions for Public Apartment Buildingsin GhanaStephen Agyefi-Mensah
nr 188A Construction Waste Generation Model for Developing CountriesLilliana Abarca-Guerrero
nr 189Synchronizing Networks:The Modeling of Supernetworks for Activity-Travel BehaviorFeixiong Liao
nr 190Time and Money Allocation Decisions in Out-of-Home Leisure Activity Choices Gamze Zeynep Dane
nr 191How to Measure Added Value of CRE and Building Design Rianne Appel-Meulenbroek
nr 192Secondary Materials in Cement-Based Products:Treatment, Modeling and Environmental InteractionMiruna Florea
nr 193Concepts for the Robustness Improvement of Self-Compacting Concrete: Effects of Admixtures and Mixture Components on the Rheology and Early Hydration at Varying TemperaturesWolfram Schmidt
�¸
nr 194Modelling and Simulation of Virtual Natural Lighting Solutions in BuildingsRizki A. Mangkuto
nr 195Nano-Silica Production at Low Temperatures from the Dissolution of Olivine - Synthesis, Tailoring and ModellingAlberto Lazaro Garcia
nr 196Building Energy Simulation Based Assessment of Industrial Halls for Design SupportBruno Lee
nr 197Computational Performance Prediction of the Potential of Hybrid Adaptable Thermal Storage Concepts for Lightweight Low-Energy Houses Pieter-Jan Hoes
nr 198Application of Nano-Silica in Concrete George Quercia Bianchi
nr 199Dynamics of Social Networks and Activity Travel BehaviourFariya Sharmeen
nr 200Building Structural Design Generation and Optimisation including Spatial ModificationJuan Manuel Davila Delgado
nr 201Hydration and Thermal Decomposition of Cement/Calcium-Sulphate Based MaterialsAriën de Korte
nr 202Republiek van Beelden:De Politieke Werkingen van het Ontwerp in Regionale PlanvormingBart de Zwart
nr 203Effects of Energy Price Increases on Individual Activity-Travel Repertoires and Energy ConsumptionDujuan Yang
nr 204Geometry and Ventilation:Evaluation of the Leeward Sawtooth Roof Potential in the Natural Ventilation of BuildingsJorge Isaac Perén Montero
nr 205Computational Modelling of Evaporative Cooling as a Climate Change Adaptation Measure at the Spatial Scale of Buildings and StreetsHamid Montazeri
nr 206Local Buckling of Aluminium Beams in Fire ConditionsRonald van der Meulen
nr 207Historic Urban Landscapes:Framing the Integration of Urban and Heritage Planning in Multilevel GovernanceLoes Veldpaus
nr 208Sustainable Transformation of the Cities:Urban Design Pragmatics to Achieve a Sustainable CityErnesto Antonio Zumelzu Scheel
nr 209Development of Sustainable Protective Ultra-High Performance Fibre Reinforced Concrete (UHPFRC):Design, Assessment and ModelingRui Yu
nr 210Uncertainty in Modeling Activity-Travel Demand in Complex Uban SystemsSoora Rasouli
nr 211Simulation-based Performance Assessment of Climate Adaptive Greenhouse ShellsChul-sung Lee
nr 212Green Cities:Modelling the Spatial Transformation of the Urban Environment using Renewable Energy TechnologiesSaleh Mohammadi
nr 213A Bounded Rationality Model of Short and Long-Term Dynamics of Activity-Travel BehaviorIfigeneia Psarra
nr 214Effects of Pricing Strategies on Dynamic Repertoires of Activity-Travel BehaviourElaheh Khademi
nr 215Handstorm Principles for Creative and Collaborative WorkingFrans van Gassel
nr 216Light Conditions in Nursing Homes:Visual Comfort and Visual Functioning of Residents Marianne M. Sinoo
nr 217Woonsporen:De Sociale en Ruimtelijke Biografie van een Stedelijk Bouwblok in de Amsterdamse Transvaalbuurt Hüseyin Hüsnü Yegenoglu
nr 218Studies on User Control in Ambient Intelligent SystemsBerent Willem Meerbeek
nr 219Daily Livings in a Smart Home:Users’ Living Preference Modeling of Smart HomesErfaneh Allameh
nr 220Smart Home Design:Spatial Preference Modeling of Smart HomesMohammadali Heidari Jozam
nr 221Wonen:Discoursen, Praktijken, PerspectievenJos Smeets
nr 222Personal Control over Indoor Climate in Offices:Impact on Comfort, Health and ProductivityAtze Christiaan Boerstra
nr 223Personalized Route Finding in Multimodal Transportation NetworksJianwe Zhang
nr 224The Design of an Adaptive Healing Room for Stroke PatientsElke Daemen
nr 225Experimental and Numerical Analysis of Climate Change Induced Risks to Historic Buildings and CollectionsZara Huijbregts
nr 226Wind Flow Modeling in Urban Areas Through Experimental and Numerical TechniquesAlessio Ricci
nr 227Clever Climate Control for Culture:Energy Efficient Indoor Climate Control Strategies for Museums Respecting Collection Preservation and Thermal Comfort of VisitorsRick Kramer
nr 228nog niet bekend / gepubliceerd
nr 229nog niet bekend / gepubliceerd
nr 230Environmental assessment of Building Integrated Photovoltaics:Numerical and Experimental Carrying Capacity Based ApproachMichiel Ritzen
nr 231Design and Performance of Plasticizing Admixture and Secondary Minerals in Alkali Activated Concrete:Sustaining a Concrete FutureArno Keulen
nr 232nog niet bekend / gepubliceerd
nr 233 Stage Acoustics and Sound Exposure in Performance and Rehearsal Spaces for Orchestras: Methods for Physical MeasurementsRemy Wenmaekers
nr 234Municipal Solid Waste Incineration (MSWI) Bottom Ash:From Waste to Value Characterization, Treatments and ApplicationPei Tang
nr 235Large Eddy Simulations Applied to Wind Loading and Pollutant DispersionMattia Ricci
nr 236Alkali Activated Slag-Fly Ash Binders: Design, Modeling and ApplicationXu Gao
nr 237Sodium Carbonate Activated Slag: Reaction Analysis, Microstructural Modification & Engineering ApplicationBo Yuan
nr 238Shopping Behavior in MallsWidiyani
nr 239Smart Grid-Building Energy Interactions;Demand Side Power Flexibility in Office BuildingsKennedy Otieno Aduda
nr 240Modeling Taxis Dynamic Behavior in Uncertain Urban EnvironmentsZheng Zhong
nr 241Gap-Theoretical Analyses of Residential Satisfaction and Intention to Move Wen Jiang