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University of Groningen
Online marketing and advertising researchYudhistira, Titah
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Online Marketing and Advertising Research
Traditional Theories Revisited
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Publisher: University of Groningen Groningen The Netherlands Printer: Ipskamp Printing, Enschede
ISBN: 978-90-367-9117-5 978-90-367-9116-8 (e-book) © Titah Yudhistira All rights reserved. No part of this publication may be reproduced, stored in a retrieval system of any nature, or transmitted in any form or by any means, electronic, mechanical, now known or hereafter invented, including photocopying or recording, without prior written permission of the publisher.
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Online Marketing and Advertising Research
Traditional Theories Revisited
PhD Thesis
to obtain the degree of PhD at the University of Groningen on the authority of the
Rector Magnificus Prof. E. Sterken and in accordance with
the decision by the College of Deans
This thesis will be defended in public on
Monday 10 October 2016 at 11.00 hours
by
Titah Yudhistira
born on 9 May 1976 in Jember, Indonesia
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Supervisor Prof. T.H.A. Bijmolt Co-supervisor Dr. K.R.E. Huizingh Assessment committee Prof. M. Clement Prof. H. van Herk Prof. J.E. Wieringa
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Acknowledgments
Completing a dissertation is a long and very demanding journey. I would never have
finished this work without my colleagues, friends, and family who supported me in
different ways along this journey. I would like to take the opportunity to mention and
thank them.
First and foremost, I am deeply grateful to my promoter and copromoter. I have been
very lucky to have Tammo Bijmolt as my promoter. Not only has his impressive
knowledge and acuity regarding statistical modeling and marketing research always
helped me when I have gotten stuck with my research, but his positive personality that
exudes optimism revived my motivation whenever I felt discouraged during the
process. I also learnt a lot from him on how to be a good researcher and supervisor.
Tammo, thank you so much for your support and confidence on me. It was a great
privilege to be your PhD student.
Eelko Huizingh, my copromoter, has played a very central role since the beginning of
my PhD journey. It was my correspondence with Eelko almost 10 years ago that
paved the way for me to be a PhD student in the Marketing Department at the
University of Groningen. During my studies, Eelko has spent much time and effort in
helping and guiding me with my writing process. He has been very patient and has
always been available to help me develop ideas for structuring and streamlining my
papers. At times, Eelko has been very critical and detail oriented, so it was very
rewarding when he finally said that he had no further feedback for my papers. I have
also enjoyed spending time with Eelko outside of the university, such as dinners
together, barbeque at his house, and especially his recent visit to Bandung. Eelko,
thanks a lot for all of your support from the very beginning of this journey.
Next, I would like to express my gratitude for the members of the reading committee,
Michel Clement, Hester van Herk, and Jaap Wieringa, for their effort and constructive
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feedback that improved this dissertation. I especially thank Jaap, who was willing to
discuss some of his comments and feedbacks on Skype. I also would like to thank my
‘internal defense’ reading committee, Bob Fennis, Maarten Gijsenberg, and Lara
Lobschat, for raising some critical issues regarding my research and giving
constructive comments and suggestions to solve those issues. This dissertation is
better because of their feedback.
I also would like to address a special thanks to Daniela Naydenova and Rully Tri
Cahyono for being my paranymphs and helping me in the preparation of my defense
ceremony while I was in Bandung, Indonesia.
Strong empirical research relies on high-quality data. The studies in Chapter 2 and
Chapter 3 are based on massive online banner advertising data provided by Metrixlab;
Lucas Hulsebos and Arjen Groeneveld made the access to these data possible.
Furthermore, Pauline Elema worked on the acquisition and pre-processing of the data
before we could start analyzing the data. The study in Chapter 4 is based on primary
and secondary data collected by Dirk Bloem. I sincerely thank each of them for
making these data available for this research.
I would like also to acknowledge financial support for portions of my studies from
three institutions. First, the University of Groningen granted me the Bernoulli
Scholarship, which covered 2 years at Groningen. Next, the Directorate General of
Higher Education of the Ministry of Education of the Republic of Indonesia funded
the last year of my studies at Groningen. Finally, during my dissertation finishing
stage, Intitut Teknologi Bandung provided the funds to cover my traveling costs to
Groningen.
It was truly a privilege to be a part of the Marketing Department of the University of
Groningen. I have learnt a lot about academic and research ethos from my colleagues
in this great department. I particularly thank Peter Leeflang, Peter Verhoef, Koen
Pauwels, Erjen van Nierop, and Jenny van Doorn, who have opened my eyes on
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marketing science with their lectures in the Advanced Marketing Model Building and
Marketing Theory classes. Furthermore, I always enjoyed the social atmosphere of the
department with its birthday treats, unpredictable outings, summer barbeques,
Sinterklaas evening, inspiring (brown bag) seminars, and other activities I now miss
so much. Many thanks to my PhD student colleagues for interesting chats during
coffee breaks and PhD dinners, especially my office mates Adriana, Eline, Shandy,
Tao, Sina, Daniela, and Katrin—thank you for the conversation during the time we
shared an office. For Matilda, Peter van Eck, Ernst, Hans, Auke, Sietske, Umut,
Stanislav, Stefanie, Lisette, Sander, Jacob, Yi-Chun, Niels, Evert, and Alec, thank you
for being such amiable PhD student fellows. Many thanks also to the secretaries of
Marketing Department, Hanneke, Frederika, and Lianne.
I would like also to thank people from the SOM office, especially to Rina Koning,
Ellen Nienhuis, and Astrid Beerta. Special thanks goes to Arthur de Boer, who
patiently provided support for all administrative matters during the preparation of my
defense ceremony. I am also grateful to my PhD coordinators, Martin Land, Linda
Toolsema, and Justin Drupsteen, who have spent their time to ensure that I would
eventually finish my studies.
I also have benefitted from many people outside my academic circle. Firstly, living in
an international student house was a great experience I will never forget. I met and
befriended literally hundreds of people from all over the globe during my stay in
Groningen. The dinners, parties, and outings with my international friends of
Plutolaan, Blue Building, and Diaconessen House were potent stress relievers. In this
regard, I especially mention Anca, Hanna, Chun-ju, Carlos, Berci, Joao, Diana, Luca,
and Ilias, with whom I have had contacts and personal visits long after we left our
international student house. Secondly, being an Indonesian abroad, at times I felt
isolated and alone. My Indonesian friends of PPIG and de Gromiest always provided
friendship and support whenever I needed them. It is impossible to mention them all,
but I would like to especially thank my Indonesian friends Ari, Kadek, Nurul, Poppy,
Teguh, Fean, Naga, Ira, Fegi, Getty, Dodi, Muhsin, Desti, Iging, Bayu, Kang Intan,
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Enci, Aree, Cynthia, Tita, Saras, Mira, Tina, Mbak Lia, Mas Yayok, Pak Adjie, Bude
Nanie, Tante Pantja, Oom Basuki, Uwak Asiyah Hofman, Kuswanto, Rully, and Intan
for their help while I was in Groningen.
In the last few years, while finishing my dissertation, I received significant support
from my colleagues at Industrial Engineering Department, Insitut Teknologi Bandung.
I especially mention Pak Senator Nur Bahagia, Bu Lucia Diawati, Pak Suprayogi, Pak
Andi Cakravastia, Bu Yosi Agustina, and Pak Rully Tri Cahyono of Laboratory of
Industrial System Planning and Optimization for their support and concern while I
was in the final stage of finishing my dissertation.
Finally, and most importantly, I would like to thank my family for their support, love,
and care. This dissertation would not be finished without continuous encouragement
from my parents, my mother Tuty Basuki and my late father Masjhud. Ibu dan bapak,
terima kasih sebesar-besarnya atas semua cinta, dukungan, dan doa yang telah
dicurahkan selama ini. My sisters and their families have also been big supporters
and motivators for me to finish this dissertation. Terima kasih Mbak Wahyu, Mbak
Uri, Mas Yan, Mas Yono, dan para keponakanku tercinta semuanya!
Bandung, September 2016
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Table of Contents Chapter 1 Introduction 1 1.1 General introduction 1 1.2 Online marketing and advertising research 3 1.3 Aim and objectives 4 1.3.1 Study 1: Effect of banner exposures on consumer memory 4 1.3.2 Study 2: Advertisement and brand metrics for online
banner advertising effectiveness 6
1.3.3 Study 3: Potential of online polls as market research instruments
7
1.4 Outline of the Dissertation 8 Chapter 2 The Effect of Banner Exposures on Consumer Memory 9 2.1 Introduction 9 2.2 Literature Background and Hypotheses 11 2.2.1 Advertisement Scheduling 11 2.2.2 Effect of Number of Exposures 12 2.2.3 Effect of Spacing 13 2.2.4 Effect of Measurement Delay 14 2.2.5 Mediating Effect of Banner Memory 15 2.2.6 Differential Effect of Exposure Variables 17 2.2.7 Other Factors Affecting Consumer Memory of Banner and
Brand
18 2.3 Data Collection and Analysis 19 2.3.1 Data collection and description 19 2.3.2 Model Formulation and Analysis 20 2.4 Results 24 2.5 Discussion 30 2.5.1 Key Findings 30 2.5.2 Practical Implication 33 2.5.3 Research Limitations and Future Research 35 Chapter 3 Ad and Brand Metrics for Banner Advertising Effectiveness 37 3.1 Introduction 37 3.2 Theoretical Background 39
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3.2.1 Indirect effect of advertising on sales 39 3.2.2 Hypotheses 40 3.3 Empirical Study Design 44 3.3.1 Survey procedure and sample description 44 3.3.2 Banner and brand effectiveness measures 45 3.4 Data analysis 47 3.4.1 Multilevel SEM for clustered observations 48 3.4.2 Categorical variables treatment 48 3.4.3 Missing values treatment 50 3.4.4 Covariates modeling 51 3.5 Results 51 3.5.1 Measurement model 51 3.5.2 Structural model 52 3.5.3 Competing model: Dual mediation 54 3.6 Conclusion 55 3.6.1 Discussion 55 3.6.2 Managerial implication 58 3.6.3 Limitations and further research 59 Chapter 4 Evaluating Website Polls as an Instrument for Customer Surveys
63
4.1 Introduction 63 4.2 Background and Research Question 66 4.3 Study Design 70 4.4 Results 72 4.4.1 Sample Characteristics 72 4.4.2 Response Distribution 73 4.4.3 Sample versus mode effects 73 4.4.4 Weighting results 74 4.5 Discussion 76 4.5.1 Conclusion 76 4.5.2 Limitations and directions for future research 79 4.5.3 Practical Implications 80 Chapter 5 Conclusion and Implication 83 5.1 Overview of Main Findings and Theoretical Implications 84 5.2 Managerial implications 87
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5.2.1 Implications for Banner Advertising 87 5.2.2 Implications for Online Marketing Research 89 5.3 Limitations and directions for further research 89 References 93 Samenvatting (Summary in Dutch) 113
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Introduction
1
Chapter 1 Introduction
1.1 General Introduction Since the new millennium, the Internet has become increasingly important to
business to consumer (B2C) markets. In 2014, the value of global B2C e-
commerce transactions reached $1.943 trillion and grew 24 percent from the
previous year (Ecommerce Foundation, 2015). Growth is predicted to continue.
Both the value of online transactions and the number of people buying online
are growing rapidly. In 2008, according to the Nielsen Global Online Survey,
the total (global) number of people shopping on the Internet was estimated to
be 875 million (marketingchart, 2008); the number grew to 1.139 billion in
2014 (Ecommerce Foundation, 2015). The proportion of online users who buy
online is also high. According to Mediascope Research (IAB Europe, 2012),
more than 85% of Internet users in Europe shopped online in 2012. With
current global Internet use penetration of three billion people (34 percent of the
world population) and an historical yearly growth average of more than 15
percent in the last 12 years (Internet World Stats, 2015), we can expect the
number of online consumers will continue to increase. As more and more
people buy online, it is not surprising that marketers and marketing academics
are paying more attention to the Internet (e.g. see Kotler and Keller, 2011;
Zikmund and Babin, 2009).
With its technological capabilities and features, the Internet is not only a
transaction channel, but also a medium for relaying marketing communications
and conducting marketing research. In the context of marketing
communications, the Internet has specific technological advantages over other
traditional media (i.e, newspapers, magazines, and television) to relay
marketing messages. Internet advertising can take many forms: text and image
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2
(similar to those in print media), sound and voice (similar to those in radio),
and video and animation (similar to those in television and on billboards).
Internet advertising also enables more interactivity by providing two-way
communication (Ko, Cho, and Roberts, 2005). Furthermore, by using Internet
Protocol (IP) and cookies technology, advertisers can measure audience
responses directly, at the individual level. They can better target audiences and
have more control over the direction of the advertising. Given all these
advantages, it is not surprising that expenditures on online advertising are
significant. In 2014, US non-mobile banner advertising generated $2.26 billion
and accounted for 16% of total Internet advertising (IAB, 2015).
In addition to its role as a marketing communications medium, the
Internet serves as a means of collecting customer information. Compared to
conventional marketing research media, a wider variety of marketing research
practices can be conducted by using the Internet. The Internet can facilitate
surveys (Couper, 2000), in-depth interviews (Pincott and Branthwaite, 2000),
focus group discussions (Montoya-Weiss et al., 1998), and ethnography studies
(Kozinets, 2003). With its ability to transmit text, images, and even videos in
real-time, the Internet can be used as a medium to implement a wide range of
market surveys. More importantly, Internet technologies such as cookies and IP
recognition make it possible to track and record consumer (online) behavior,
which in turn provides market researchers with both attitudinal and real-time
consumer behavior data. This fusion of attitudinal data and behavioral data,
enabled by Internet technology, has created new opportunities to address
marketing research questions and gain insights (Breur, 2011).
Research on how Internet technology affects consumer response to
marketing has been taking place since the introduction of the Internet.
However, both Internet marketing research and advertising instruments—and
the ways in which consumers react to them—are evolving, leading to gaps in
knowledge (Ha, 2008; Schibrowsky, Peltier, and Nill, 2007). This dissertation
aims to fill some of these gaps by developing a greater understanding of how
the Internet impacts online marketing and advertising research.
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Introduction
3
1.2 Online Marketing and Advertising Research As a tool for observing consumer online behavior, the Internet has powerful
features such as IP recognition and cookies that record actions, expose
information, and identify devices used. These features have enabled companies
to practice effective customer relationship management (CRM). A number of
studies have been conducted to analyze and fully capitalize on the potential of
the Internet to improve these practices (for a review see, for example, Romano
and Fjermestad, 2003) and make optimal use of information gathered from
online consumer activities.
Traditionally, advertising research has focused on advertising
effectiveness. It has answered questions about how advertising works (ranging
from capturing attention to inducing action) (Vakratsas and Ambler, 2000) and
which metrics best measure the effectiveness of an advertisement. As
advertising research continues to build arguments and propose new theories, it
is becoming more important to study the context of online advertising.
Different types of media may have different effects on cognitive processes
(Sparrow, Liu, and Wegner, 2011). Although previous studies of online
advertising have extensively examined the effects of online advertising on
advertising and brand metrics (e.g., Chatterjee, 2008; Drèze and Hussherr,
2003; Havlena and Graham, 2004; Yoo, 2008), further studies are needed to
build a more comprehensive framework for studying the effectiveness of online
advertising.
Given the ability of Internet surveys to mimic traditional surveys in an
online environment, and the Internet’s abilities to include multimedia and real-
time answer screening, online surveys are used by marketing research agencies
worldwide (Evans and Mathur, 2005). The Internet makes surveying faster and
more economical (Couper, 2000). However, online surveys do suffer from
several weaknesses (e.g.. Fricker and Schonlau, 2002; Furrer and Sudharshan,
2001; Ilieva et al., 2002; Tingling et al., 2003; Wilson and Laskey, 2003),
including problems with validity, representativeness, and generalizability of the
responses. As the Internet spreads into more regions and permeates more social
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4
classes, issues of representativeness and generalizability arguably will become
less serious (Evans and Mathur, 2005). Furthermore, advanced Internet
technologies, such as IP recognition, geo-tagging, and Internet security
(Eysenbach, 2005) make it possible to implement online panels and screen
irrelevant or invalid responses. These technologies, combined with new survey
methodologies such as mixed mode analysis (Blyth, 2008) and complex
weighting procedures (Loosveldt and Sonck, 2008), may alleviate issues and
problems pertaining to online surveys (Callegaro et al., 2014). Further research
on online surveying is needed, particularly with regard to survey types that
have so far received little attention.
1.3 Aim and Objectives This dissertation focuses on three empirical studies, examining substantive
issues related to online marketing and advertising:
(i) Effect of banner exposures on consumer memory.
(ii) Advertisement and brand metrics for online banner advertising
effectiveness.
(iii) Potential of online polls as market research instruments. The main characteristics of these studies are shown in Table 1.1.
The following sections provide a brief discussion of theoretical
background and the contributions of the three studies to marketing literature.
1.3.1 Study 1: Effect of Banner Exposures on Consumer Memory Consumer memory is an important factor in marketing. Consumer decisions are
affected by consumer memory (see Hoyer and MacInnis, 2008, p. 174-176).
Brand memory is an important metric for companies; advertising is one method
of improving it. Many studies have been conducted to study the effectiveness
of advertising in improving brand memory (see e.g., Fennis and Stroebe, 2010,
Ch. 3).
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Introduction
5
Table 1.1 Characteristics of the studies in this dissertation Study 1 Study 2 Study 3
Subject Effect of banner exposures on consumer memory
Advertisement and brand metrics for banner advertising effectiveness
Potential of online polls as market research instrument
Data source - Survey data - Internet activity record (cookies data)
- Survey data - Internet activity record
(cookies data)
- Survey data - Company database
Sample n = 8736 21 campaigns
n = 19994 29 campaigns
n = 250 (telephone) n = 1018 (website poll) n = 80000 (company database)
Analysis Method Multilevel Mediation Analysis
Multilevel Structural Equation Modeling
Population means comparison, ANOVA
Recent psychological research (Sparrow, Liu, and Wegner, 2011)
indicates the Internet affects the cognitive processes and memories of Internet
users (see also Carr, 2010). This new understanding demands that we revisit
traditional media theories of how advertising affects consumer memory.
A number of studies have demonstrated that the effectiveness of an
advertising campaign is affected by the campaign’s schedule (e.g.
Zielske, 1959; Heflin and Haygood, 1985; Janiszewski, Noel, and Sawyer,
2003). Campaign schedules are characterized by the number of exposures, time
interval between exposures (spacing), and elapsed time since last exposure
(delay). Several studies have investigated the effects of number of exposures,
spacing, and delay in traditional media, but research on the effects of campaign
schedules in Internet advertising is scant. Previous research (Yoo, 2008; Yoo
and Kim, 2005) has indicated different forms of Internet advertising may have
different effects on consumer memory. Because banner advertising is
ubiquitous, and claims a significant share of the overall online advertising
budget (16% in 2014) (IAB, 2015), Study 1 focuses on banner advertising. The
research question addressed in Study 1 (Chapter 2) is:
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“What is the impact of banner advertising number of exposures,
spacing, and delay on consumer memory, in terms of banner and
brand awareness?”
This study makes several contributions to literature. First, in the context of
banner advertising, it is the first to examine the simultaneous effects of number
of exposures, spacing, and delay of banner exposures. Second, it measures
banner and brand memory by recall and recognition. By using these measures,
a more comprehensive hypothesized process can be analyzed. Insights from the
analyses contribute to literature by examining whether and how banner
exposure works to enhance consumer memory.
1.3.2 Study 2: Advertisement and Brand Metrics for Online Banner
Advertising Effectiveness In advertising and marketing communications literature, the hierarchy of
effects is widely used to explain the consumer’s psychological progression
from an initial state of unawareness about a brand to eventual purchase of that
brand (Shimp, 2008). In the context of banner advertising, researchers and
advertisers are interested in the effect of banner exposures on consumer
memory, attitudes, and behavior.
A number of studies of banner advertising have investigated the effects
of banner exposures on banner and brand awareness, banner and brand
attitudes, and purchase intentions (e.g., Chatterjee, 2008; Drèze and Hussherr,
2003; Havlena and Graham, 2004; Yoo, 2008). However, these studies focus
on only one or a few metrics of banner effectiveness. Study 2 aims to
determine the interrelationships among various effect measures to develop a
comprehensive model that links banner memory and banner attitude to brand
memory and brand attitude, and ultimately to purchase intention. Study 2 poses
the following questions:
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Introduction
7
“How are advertising and brand metrics interrelated in banner
advertising? How do these interrelationships differ from those in
traditional media advertising?”
By answering these questions, this study makes three key contributions to
advertising literature. First, in contrast to previous banner advertising research
that has investigated separate relations between banner advertising and
individual metrics, this study constructs and tests a comprehensive model
linking banner memory and attitude to brand memory and attitude, and
ultimately to brand purchase intentions. Second, in the framework of structural
equation modeling, the study tests an alternative model of relationships that
have been established for traditional advertising. By analyzing the model
fitness and significant relationships among the metrics in both models, a
comparison can be made of how the advertising ‘hierarchy of effects’ takes
shape in both banner and traditional advertising.
1.3.3 Study 3: Potential of Online Polls as Market Research
Instruments Online surveying began almost as soon as it was apparent that the Internet was
a tool for conducting research (Comley, 1996). Online surveys take many
forms and are administered using different methods. Couper (2000)
summarized varieties of online surveys and concluded that while some forms
of online surveys might produce quality responses, others were deemed to be
unscientific because of their non-probabilistic sampling nature, resulting in
unrepresentative samples of the general population. However, in some
marketing research settings the general population is not relevant; customer
segments are only part of the general population. Furthermore, a number of
marketing research companies use non-probabilistic samples for their online
surveys (Evans and Mathur, 2005). In fact, the panel surveys in Study 1 and
Study 2 of this dissertation are not (technically) random samples from the
population. This situation and the fact that early studies in non-probabilistic
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Chapter 1
8
surveys (e.g. Smith, 2001; Yoshimura, 2004) have indicated opportunities to
rectify the problem of non-coverage in non-probabilistic online surveys raise
the question of whether simple surveys—“online polls”—on a company
website have merit as market research instruments. Hence, the main research
questions that will be addressed in Study 3 (Chapter 4) are:
“How different are demographic and response characteristics of
online polls and conventional survey respondents? What are the
sources of and solutions for the differences?”
This study will contribute to literature by being the first to provide results on
the value and usability of self-selected non-probabilistic online surveys, such as
online polls, for marketing research purposes.
1.4 Outline of the Dissertation
This dissertation contributes to existing literature on marketing by providing
new insights on how the Internet impacts marketing communications and
market research practices.
In Chapter 2 (Study 1), we demonstrate how banner exposure
characteristics affect consumer memory. In Chapter 3 (Study 2), we propose a
model relating advertisement and brand metrics for online banner advertising
in a hierarchy of effects context. In Chapter 4 (Study 3), we discuss the
potential of online polls as market research instruments. Finally, in Chapter 5
we summarize the main conclusions of this dissertation, provide a general
discussion of the findings, and discuss further research avenues.
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The Effect of Banner Exposures on Consumer Memory
9
Chapter 2 The Effect of Banner Exposures on Consumer Memory
2.1 Introduction
The scheduling of Internet advertising has become an important topic in marketing: in
2103, total spending on Internet advertising finally surpassed total spending on
newspaper and other print media advertising (McKinsey, 2014). Apart from this,
compared to traditional media, Internet advertising, using some Internet technologies,
has more control on to whom, when, and where an advertising to be exposed. In
traditional media, advertising scheduling has long been an important issue and has
been well studied by academics. Although research clearly shows different advertising
schedules lead to different degrees of advertising effectiveness (e.g., recall patterns)
(Zielske and Henry, 1980), there is less clarity about optimal scheduling. For example,
Strong (1977) suggests alternating between high and low exposure rates to achieve
maximum awareness, while Zielske and Henry (1980) suggest massing the exposures
at the beginning of a campaign. Other researchers (e.g., Mahajan and Muller, 1986;
Mesak, 2002; Sasieni, 1989) propose models to analyze various advertising schedule
strategies. These models require input on the effect of the number of exposures, time
interval between exposures (spacing), and elapsed time since last exposure
(measurement delay) to predict the effectiveness of a particular advertising scheduling
strategy.
Many studies of traditional media have investigated the effect of exposure
characteristics (number of exposures, spacing, and delay) but research remains scant
in the area of Internet advertising. For instance, although there are multiple studies on
the effect of Internet advertising number of exposures (e.g., Broussard, 2000; Drèze
and Hussherr, 2003; Yaveroglu and Donthu, 2008), only a few focus on the effect of
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Chapter 2
10
spacing and measurement delay in Internet advertising. These include Fang et al.
(2007) on the effect of spacing on brand attitude and Havlena and Graham (2004) on
the effect of measurement delay on brand awareness and attitude. To the best of our
knowledge, no study has investigated the effects of number of exposures, spacing, and
delay on advertising and brand awareness, simultaneously, in a single integrated
Internet advertising model. This gap must be addressed because research in traditional
media has shown the effects of exposure characteristics differ across media due to
differences in the level of attention being paid during advertising exposures (see
Fennis and Stroebe, 2010, p. 42–43). For example, Dijkstra et al. (2005) found
television advertising performed better in evoking cognitive responses than print
advertising. Consumers pay even less attention to Internet advertising than to print
advertising; they consciously avoid it (Drèze and Hussherr, 2003; Dahlen, 2001). This
may impact the effect of number of exposures, spacing, and delay.
Banner advertising accounts for a significant share of Internet advertising
spending. In 2014, U.S. non-mobile banner advertising generated $2.26 billion and
accounted for 16% of total Internet advertising (IAB, 2015). In addition to
encouraging click-through, the purpose of banner advertising is to improve brand
performance metrics such as brand awareness. When brand awareness levels are
higher, consumers exposed to banner advertisements will be able to recall or
recognize the advertised brand when making a purchase decision. Along with click-
through rate, enhanced consumer memory is an important measure of banner
effectiveness (Briggs and Hollis, 1997).
The overall objective of our study is to reveal how the various characteristics of
banner exposures (number of exposures, spacing, and measurement delay) affect
consumer memory of the banner and the brand. By determining these effects,
advertisers can estimate the effectiveness of various banner-based advertising
schedules. Using data from 21 actual banner campaigns involving almost 9,000
consumers, we find the effect of number of exposures on consumer memory for both
the banner and the brand is initially positive, but becomes less so as the number
increases. The positive effect of number of exposures is greater if there is a moderate
interval between exposures, but enhanced memory resulting from banner exposure
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The Effect of Banner Exposures on Consumer Memory
11
eventually decays. This finding suggests continuous advertising with even spacing is
the best advertising scheduling strategy for banner advertising. Furthermore, although
we find banner exposures have similar effects on consumer memory as advertising
exposures in traditional media, there is an important difference in how the effect is
achieved. In banner advertising, the effect of exposures on brand memory is indirect
and mediated by banner memory. This finding implies it is crucial that consumers
remember the actual banner advertisements.
In the following section, we present a literature background and our research
hypotheses. Next, we describe the research design, including data collection, model
formulation, and data analysis. We follow with results and conclude with a discussion,
practical implications, limitations, and future research.
2.2 Literature Background and Hypotheses
2.2.1 Advertisement Scheduling Advertisers use several strategies for scheduling advertisements (Mahajan and Muller,
1986). Three commonly applied strategies are:
1. Blitz, in which most or all advertisements are concentrated in a short period at the
beginning of a campaign;
2. Pulsing, in which advertisements are broadcast or published by alternating very
high intensity with and low or zero intensity during the campaign;
3. Even, in which advertisement exposures are held almost constant during the
campaign.
Within a particular campaign time period, these strategies can be characterized
by three variables: (i) number of exposures, (ii) average time interval between
exposures (spacing), and (iii) time between last exposure and a consumer action (e.g.,
related to the purchase cycle). For instance, a blitz campaign is characterized by a high
frequency at the beginning and a very low or even zero frequency after a short period
of time, a very low average time interval between exposures, and a large distance
between the last exposure and the end of the current campaign time (because most of
the advertising budget is spent at the beginning of the campaign). In contrast, an even
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campaign is characterized by a moderate interval time between exposures and
continuous exposure during a particular campaign period. Knowledge of the effect of
the various exposure variables is needed to predict the consequences of various banner
scheduling strategies on banner effectiveness.
In the next sections, we discuss findings from psychology, marketing, and
advertising literature on the effects of number of exposures, spacing, and
measurement delay on consumer memory for both banner and brand.
2.2.2 Effect of Number of Exposures Through repeated exposures to advertisements, consumers can rehearse information
about the advertisements. Rehearsal may improve information storage to, and recall
from, long-term memory (Dark and Loftus, 1976). Advertisement repetition may
enhance advertising and brand awareness; experimental and field advertising studies
have shown the number of exposures affects advertising and brand awareness
(Pechmann and Stewart, 1989). When attention to advertising is low, the first few
exposures may not improve awareness. Advertising effects build over time, following
a wear-in process (Blair, 2000). However, the build-up effect of repetition decreases
and may become negative after a certain number of exposures, a phenomenon known
as the wear-out effect (see Pechmann and Stewart, 1989). These possible wear-in and
wear-out effects underscore the importance of understanding the relationship between
the number of exposures and measures of advertising effectiveness.
The issue of the number of exposures effectiveness is even more complicated
for banner advertising because banners are likely to be overlooked by website visitors.
In an eye-tracking study, Drèze and Hussherr (2003) show Internet users avoid
looking at banners. Hoffman and Novak (1996) find experienced Internet users,
compared with novice Internet users, focus more on the main content of a webpage
and are less susceptible to the influence of banners. Dahlen (2001) confirms banners
are more effective for novice Internet users.
Given this situation, it is not surprising there are mixed findings in studies on
the effect of exposures for banners. Although Drèze and Hussherr (2003) and Havlena
and Graham (2004) find a positive effect of exposures on banner and brand awareness,
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The Effect of Banner Exposures on Consumer Memory
13
Yoo (2008) does not; however, he does find positive effects on brand attitude and
brand consideration. He attributes these effects to implicit memory resulting from the
exposures. In his experiment, Yoo (2008) used only one exposure rather than multiple
exposures; if there are positive effects of exposures to banners, a single exposure may
not be strong enough to be explicitly recorded in memory. With higher frequencies of
exposures, the wear-in effect (as discussed above) may be strong enough to cause
banners and advertised brands to be remembered. Therefore, our first hypothesis is:
Hypothesis 1: The number of banner exposures has a positive effect on a) banner
memory and b) brand memory.
2.2.3 Effect of Spacing A given number of exposures can be spread in several ways during the campaign
period. Different time intervals are expected to have different memory effects. For
example, extensive research in verbal learning has found providing a longer time
interval between exposures to a stimulus can lead to memory enhancement
(Janiszewski et al., 2003), an effect known as spacing (Noel and Vallen, 2009; Sawyer
et al., 2009).
Several theories have been proposed to explain the cognitive mechanism
behind the spacing effect (Appleton-Knapp et al., 2005; Janiszewski et al, 2003; Noel
and Vallen, 2009). Two of the most frequently cited mechanisms are encoding
variability (D’Agostino & DeRemer, 1973) and the study-phase retrieval process
(Thios & D’Agostino, 1976). Encoding variability theory posits that subsequent recall
can be enhanced if there is variation in how information is encoded from multiple
exposures to the stimulus. Differences in encoded information provide manifold
routes for recall. Because of the change of context for the information, spacing
ensures the stimulus encountered in the subsequent exposure will be encoded
differently from that of the previous exposure. This mechanism implies the greater the
time interval between exposures, the more impact on memory gained from the
subsequent exposure (Appleton-Knapp et al., 2005).
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Chapter 2
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Alternatively, the study-phase retrieval process assumes that subsequent
exposure to a stimulus enables information retrieval about that stimulus recorded in
memory from the previous exposure. The retrieval itself is another learning process, in
that the information being retrieved is more easily recalled in the future. Furthermore,
future recall is greater when the level of difficulty in retrieving the information from
the previous exposure is higher. Because longer spacing between two exposures
makes it more difficult to retrieve information from the first exposure, longer spacing
results in enhanced memory recall. However, this longer interval is limited to a point
where such retrieval starts to fail (Appleton-Knapp et al., 2005). Optimal spacing
occurs when the interval between two exposures is long enough to make the retrieval
process not too easy and not too difficult. Therefore, the study-phase retrieval process
predicts an inverted U-shape effect of exposure spacing on recall.
Early research (Singh et al., 1994; Unnava and Burnkrant, 1991) proposed that
encoding variability is the dominant mechanism of the spacing effect in advertising.
However, more recent research (Appleton-Knapp et al., 2005; Janiszewski et al.,
2003) provides more support for the study-phase retrieval process. Heflin and
Haygood (1985) found inverted U-shape of recall and recognition response curves
against interval length between exposures. These findings seem to support the study-
phase retrieval process. Hence, we predict the effect of spacing will follow an inverted
U-shape, with spacing has the greatest effect when the interval between exposures is
moderate.
Hypothesis 2: The effect of spacing on a) banner memory and b) brand memory
follows an inverted U-shape.
2.2.4 Effect of Measurement Delay We do not expect the effect of an advertising exposure will be everlasting. Consumers
will forget advertising over time (Hutchinson and Moore, 1984). Therefore, the time
interval between exposures and advertising effectiveness measurement (i.e., the
measurement delay), directly influences the estimated advertising effectiveness. It is
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The Effect of Banner Exposures on Consumer Memory
15
crucial to take this effect into account in situations in which the measurement delay
varies between consumers, as is the case with banner advertising.
Consumer forgetting occurs when associations between pieces of information
in memory decay over time (Warlop et al., 2005). Several studies of print and
television advertising have demonstrated that consumer forgetting in print and
television advertising is a function of time (e.g., Gregan-Paxton and Loken, 1997).
The studies suggest the decline of memory of an advertisement and its message is
inevitable, due to the time effect and the interference effect of advertising clutter
(Burke and Srull, 1988). Only one study of banner advertising has specifically
investigated the effect of measurement delay on advertising and brand recognition.
Havlena and Graham (2004) analyzed online advertising in three different industries;
they found no significant negative effect of measurement delay on advertising and
brand recognition. Hence, in contrast to findings in print and television advertising,
Havlena and Graham (2004) conclude “the short duration of time since last exposure
to brand measurement is an issue, but not a serious one” (p. 331).
Despite the surprising finding of Havlena and Graham (2004), we expect a
negative effect of measurement delay. We base our prediction on both the extensive
evidence of this effect in traditional media and its theoretical logic. We formulate our
hypothesis as:
Hypothesis 3:Measurement delay has a negative impact on a) banner memory and b)
brand memory.
2.2.5 Mediating Effect of Banner Memory Human memory can be represented as a complex associative network. Memories for
components of an advertisement (e.g., logo, images, music, or endorsing figures),
information from the advertising (e.g., brand claims, or brand positioning in a product
category), and the brand itself are interrelated. Information about the advertising and
the brand is encoded in memory as a pattern of links between concept nodes (Burke
and Srull, 1988). When a consumer is exposed to a stimulus, parts of the associative
network are activated. The more frequently a node is activated, the more salient other
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nodes within the associative network in the consumer mind, connected with the
activated node, become (du Plessis, 2008). The subsequently activated node in the
associative network could be brand name. When an advertisement contains a brand
name, logo, and product image representing the product category, all of the
components and their relationships become more accessible for future reference.
When a consumer is asked to name a soft drink brand and when the name of the brand
or the product (for example, the beverage bottle) is absent, the consumer will search in
memory for a soft drink brand name. During this process, a recollection of personal
experience or others’ experiences (through advertising) triggers the memory of the
brand name. In this way, memory of the product advertisement mediates memory of
the brand.
Many laboratory studies that measure the effect of advertising exposures on
brand memory require subjects to view advertising. Pechman and Stewart (1989)
characterize these studies as massed and forced exposures. With massed and forced
exposure in a controlled environment, any changes in brand memory can be attributed
to the advertising exposures. If there is a significant difference in awareness of a
brand, particularly a hypothetical brand, this difference must be caused by the
advertising exposures. However, the situation is more complicated in banner
advertising studies based on actual campaigns. A person may be presented with a
banner on a webpage but may not see the banner; perhaps the visitor does not scroll
down the webpage or is too absorbed with the article or other stimuli on the webpage
to look at the advertisement (Drèze and Hussherr, 2003; Dahlen, 2001).
When there is no information available about whether a respondent has actually
looked at the banner, memory for the banner can serve as a cue that the respondent has
previously looked at and, to some degree, consciously processed the banner. When
respondents recognize they have seen a banner (perhaps several times), the effect of
banner exposure on brand memory is also more likely to occur. Hence, we formulate
our hypothesis as:
Hypothesis 4: The effects of (a) number of exposures, ((b) spacing, and (c) measurement delay on brand memory are mediated by banner memory.
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The Effect of Banner Exposures on Consumer Memory
17
2.2.6 Differential Effect of Exposure Variables Measuring memory traces of information from advertising is a complex process (see,
for example Baddeley, 1997); the information is not always easily retrievable. There is
no universal way of measuring consumer memories of advertising. Detection of
memory traces depends on using a memory test with external cues (recognition) rather
than a memory test without external cues (recall), because the presence of cues may
help the information retrieval process (Lynch and Srull, 1982; Keller, 1987). It is
important to know the differential effect of exposure variables on recall and
recognition, because both may be relevant, depending on the situation faced by a
consumer when making a buying decision (Singh et al., 1988). In a situation where a
stimulus is presented (for example, in a supermarket) during the decision-making,
recognition is more relevant. When the decision is made at home in the absence of the
stimulus, recall is more relevant. In this context, a pertinent research question is to
what extent advertising exposure variables differ in affecting recall and recognition.
In the context of brand awareness, Laurent et al. (1995) demonstrated that
recognition and recall measure the same underlying construct: brand salience; the
score difference was the result of task difficulty differences. The threshold for brand
salience is higher for a person to recall than to recognize the brand. As a result,
recognition scores tend to be higher than recall scores (du Plessis, 1994; Laurent et al.,
1995).
With regard to the number of exposures, according to the two-stage learning
model (Pechmann and Stewart, 1989), multiple exposures are needed to allow
detection of advertising traces in consumer memory through either recall or
recognition tasks. Since recall tasks are more difficult than recognition tasks, we
expect the number of exposures needed to perform a recall task is greater than the
number needed for a recognition task. In other words, individuals subject to the same
number of exposures are more likely to recognize advertisements or brands than they
are to recall them.
With respect to measurement delay, both recognition and recall suffer from the
memory decay of brand salience. However, because recognition is easier, it has a
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Chapter 2
18
lower threshold than recall for successful performance. As time progresses and brand
salience decays, the salience will drop below the threshold for recall, but remain
above the threshold level for recognition. With regard to spacing effect, it is not easily
determined whether it is stronger for recall or for recognition; the outcome depends on
the underlying mechanism creating the spacing effect.
We do not formulate explicit hypotheses for the differential effects of number
of exposures, spacing, and measurement delay on recall versus recognition because
the effect sizes will depend on whether certain thresholds are reached. Instead, we
empirically explore the differences between recall and recognition effect measures.
All hypothesized relationships above are depicted in Figure 2.1. 2.2.7 Other Factors Affecting Consumer Memory of Banner and Brand
In addition to being affected by exposure characteristics, consumer memory for
advertising or a brand is also affected by individual characteristics such as age and
gender (Krishnan and Chakravarti, 1999). Older consumers have more difficulty
accessing their memory (Burke and Light, 1981). Females may have an advantage in
performing recall and recognition tasks, especially for stimuli with lower exposure
levels, due to their lower encoding threshold (Meyers-Levy and Sternthal, 1991).
Previous experience with the brand is also an influencing factor: such
experience conveys brand familiarity, which in turn affects memory of the brand
(Campbell and Keller, 2003). Users of the brand are likely better able to recall or
recognize the brand and the advertising of the brand. We do not formulate specific
hypotheses regarding these factors. Instead, we use them as control variables and to
check face validity of the model results.
In addition to consumer factors, banner memory and brand memory also
depend on characteristics of the banner and the brand. However, most of these factors
are not observable; because of their influence, each observation within a campaign is
not independent from other observations of the same campaign. We therefore use
multilevel analysis to cope with the issue of non-independent observations. We
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The Effect of Banner Exposures on Consumer Memory
19
Figure 2.1. Diagrammatic Representation of Hypotheses
include ‘brand popularity’ and ‘product category’ as control variables for recall and
recognition in our model at the campaign level, but we do not propose any specific
hypotheses.
2.3 Data Collection and Analysis 2.3.1 Data Collection and Description The dataset used for this study is part of a database of Advertising Campaign
Evaluation (ACE) studies conducted by MetrixLab, a global online market research
company with operations covering more than 44 countries worldwide. ACE evaluates
the impact of several aspects of a campaign on branding. Our study includes data from
21 different banner campaigns conducted in seven countries in Europe and Latin
America; respondents were recruited randomly from websites featuring campaign
banners. There is a total of 8,736 respondents, with sample sizes per campaign ranging
from 47 to 1,272. Each respondent was exposed at least twice to the banners under
study, meeting the minimum number of exposures required to measure exposure
characteristics.
Using proprietary tagging technology, MetrixLab collects two types of data
during an ACE study. The first type is exposure-related data, a data series that records
- Usage- Gender- Age- Brand Popularity- Product Category
BANNER MEMORY(Recall/Recognition)
BRAND MEMORY(Recall/Recognition)
EXPOSURECHARACTERISTICS- Frequency- Spacing- Delay
- Usage- Gender- Age- Brand Popularity- Product Category
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Chapter 2
20
the time at which the respondent is exposed to a particular banner. The data are
recorded by means of a cookie and extracted at the time of the survey. From these
data, we can derive the variables of number of exposures, average time between
exposures, and time between the survey and last banner exposure. The second type of
data is drawn from survey questions, completed by respondents, that relate to the
campaign and the brand; they gather information about banner and brand awareness as
well as demographics.
In the survey, respondents are asked about one brand in a product category.
They are then questioned about their awareness of all other brands in the category.
Next, they are asked to identify media in which they have seen the brand advertised.
This procedure measures whether respondents are able to recall the banner as a form
of advertising (in addition to television or printed advertisements, for example) of the
brand. They are then shown the banner to which (according to the cookie) they have
been exposed, and asked whether they recognize it. Finally, respondents answer
questions related to their usage of the brand and their demographics. Table 2.1
provides a summary of the descriptive statistics and survey questions.
2.3.2 Model Formulation and Analysis We employ a structural equation model to test the relationships proposed in
Hypotheses 1–4 of our research framework (Figure 2.1). Iaobucci et al. (2007) shows
that a structural equation model (SEM) approach performs better in analyzing
mediated relationships than the classical Baron and Kenny (1986) approach, which
uses a set of independent regression models. In addition, because banner memory and
brand memory are measured as binary variables, the test of significance of the indirect
effects using the classical mediation analysis is more complicated than if the variables
are measured using metric scales (MacKinnon and Dwyer, 1993). This complexity is
amplified by the hierarchical nature of the data. In recent years, new developments in
the application of SEM methodology have enabled researchers to assess mediation in
multilevel data (Preacher et al., 2010) by using supporting software (Muthén and
Muthén, 2010). Hence, based on these theoretical and practical considerations we use
the SEM approach.
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(bin
ary,
1 =
use
r)
8736
.3
1 0.
46
- -
Hav
e yo
u ev
er u
sed
[bra
nd]?
A
ge (y
ears
) 87
36
39.8
0 12
.75
.036
-.7
93
How
old
are
you
? G
ende
r (bi
nary
, 1=
fem
ale)
87
36
0.59
0.
49
- -
Wha
t is y
our g
ende
r?
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Chapter 2
22
We estimate two models. The first model is designed to study the effect of
banner exposure variables on consumer memory, measured by banner and brand
recall. The second model determines memory by banner and brand recognition. Our
structural models can be represented by the following equations:
(1)
(2)
(3)
(4)
yadx : banner recall or banner recognition (x is to be replaced by either recall or
recognition)
ybrx : brand recall or brand recognition (x is to be replaced by either recall or
recognition)
expos : number of banner exposures (in log)
delay : delay between last exposure and survey time (in log of minutes)
spacing : average time between exposures (in log of minutes)
usage : dummy variable indicating whether the respondent has experience with the
brand
gender : dummy variable indicating whether the respondent is female (1) or male (0)
age : age of the respondent
brandpop : brand popularity, measured by average recognition of the brand
cat1 : dummy variable in which cat1 = 1, indicating the brand is a nondurable
product
cat2 : dummy variable in which cat2 = 1, indicating the brand is a durable
product, hence cat1 =0 and cat2 = 0, indicating the brand is of a service
i,j : subscripts for individual i in campaign j
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The Effect of Banner Exposures on Consumer Memory
23
Equations (1) and (2) capture the effect of the exposure variables and the covariates
on banner memory; equations (3) and (4) capture those effects for brand memory.
Parameters β1 and β2 capture the direct effects of number of exposures and of
measurement delay on banner and brand memory, and β3 and β4 together capture the
spacing effect: if β4 is negative, the hypothesized inverted U-shape from Hypothesis 4
is supported. Parameter β8 captures the direct effect of banner memory on brand
memory. Hence, the indirect effects of the exposure variables on brand memory (the
effect mediated by banner memory) are β1,2,3,4 x β8. Furthermore, β0j depicts the base
of banner memory and brand memory for campaign j, which are affected by brand
popularity and brand product category. The heterogeneity of the bases for each
campaign is captured by u0j. The model is estimated using Bayesian methods with
Mplus software (Muthén and Muthén, 2010).
2.4 Results Results from the model estimations are presented in Table 2.2. A summary of the
results is depicted in Figure 2.2.
Effect of number of exposures. We find highly significant direct effects of number of
banner exposures on banner recall ( = 0.078, p < 0.001) and banner recognition ( =
0.035, p < 0.040). Because the model contains the log of number of exposures, the
implication is that the effect diminishes as the number increases. Nevertheless, the
relationship curve is monotonic; we do not observe the phenomenon of wear-out for
banner advertising. Figure 2.3 depicts the effects of varying number of exposures on
the probability to recall and recognize the banner, assuming all other variables to be
constant.
The direct effects of number of exposures are not significant on brand recall
( = -0.018, p = 0.187) and brand recognition ( = 0.013, p = 0.314). Hence, with
regard to Hypothesis 1, we conclude banner exposures have a direct and positive
impact on banner memory (H1a), but a direct effect on brand memory is not observed
(H1b).
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Chapter 2
24
(a) Recall Model
(b) Recognition Model
Note: Figures in parentheses are posterior standard deviations
Figure 2.2 Summary of Model Estimation Result
The absence of a direct effect of number of exposures on brand memory leads
to the question of whether the effect could be indirect and mediated by banner
memory (Hypothesis 4a). In Table 2.2, we see the effect of number of exposures on
brand memory is mediated by banner memory ( 1 x 8) and is significantly positive
(with p < 0.001 for recall and p < 0.05 for recognition). This significant indirect effect
and the non-significant direct effect of number of exposures on brand memory shows
the effect of exposures on brand memory is fully mediated by banner memory,
thereby confirming Hypothesis 4.
Banner Recall
Brand Recall
Exposure Variables- Frequency (F)- Spacing (S)- Spacing squared (S2)- Measurement delay (D)
- F : .078 (.022)- S : .026 (.021)- S2: -.003 (.002)- D : -.030 (.006)
.135 (.024)
- F : .078 (.022)- S : .026 (.021)- S2: -.003 (.002)- D : -.030 (.006)
Banner Recognition
Brand Recognition
Exposure Variables- Frequency (F)- Spacing (S)- Spacing squared (S2)- Measurement delay (D)
- F : .035 (.020)- S : .033 (.019)- S2: -.004 (.002)- D : -.022 (.006)
.079 (.029)
- F : .013 (.026)- S : -.020 (.024)- S2: -.002 (.003)- D : -.006 (.007)
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The Effect of Banner Exposures on Consumer Memory
25
Figure 2.3. Effect of Number of Exposures on Probability to recall and Recognize the Banner
Effect of spacing. The spacing effect is captured by the parameters β3 and β4, where
β4 is the parameter for the squared time interval between exposures. A significant
positive β3 and a significant negative β4 imply the effect of spacing has an inverted-U
shape, as proposed by Hypothesis 2. For banner recognition, both β3 ( 3 = 0.033, p =
0.044) and β4 ( 4 = -0.004, p = 0.036) are significant at the 0.05 level. Figure 2.4
depicts the effect of varying spacing intervals on probability to recognize the banner
when the effect of other variables is held constant. We see there is a peak on the
curve. This peak is reached when spacing is about 62 minutes.
The direct effect of spacing is insignificant for brand recognition. However,
further analysis shows Hypothesis 4a is supported by the data; there is a significant
indirect effect of spacing on brand recognition ( 3 x 8= 0.003, p = 0.047 and 4 x
8= -0.0004, p = 0.039). These findings indicate banner spacing also affects brand
recognition, but in an indirect manner.
However, the spacing effect seems to be lacking for recall. Both β3 and β4 are
insignificant for banner recall as well as for brand recall, implying Hypothesis 2 is
rejected for recall. As a consequence of a lack of direct effect of spacing on banner
recall, the hypothesis that the spacing effect on brand recall is mediated by banner
recall is also rejected (Hypothesis 4b).
0,15
0,17
0,19
0,21
0,23
0,25
0,27
0,29
0,31
0,33
1 6 11 16 21 26 31 36 41 46
Prob
abili
ty
Frequency
Recognition
Recall
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Tab
le 2
.2. P
aram
eter
Est
imat
es fo
r M
odel
s
Dep
ende
nt v
aria
ble
Inde
pend
ent v
aria
ble
Ban
ner r
ecal
l
Bra
nd re
call
Ban
ner r
ecog
nitio
n B
rand
reco
gniti
on
Dir
ect e
ffect
s
� 1 (n
umbe
r of e
xpos
ures
) .0
78
(.022
)***
-.018
(.0
33)
.035
(.0
20)*
* .0
13
(.026
) � 2
(mea
sure
men
t del
ay)
-.030
(.0
06)*
**
-.0
02
(.002
) -.0
22
(.006
)***
-.0
06
(.007
) � 3
(spa
cing
- lin
ear)
.0
26
(.020
)*
-.0
03
(.003
) .0
33
(.018
)**
-.020
(.0
24)
� 4 (s
paci
ng -
quad
ratic
) -.0
03
(.002
)*
.0
01
(.100
) -.0
04
(.002
)**
.002
(.0
03)
� 5 (u
sage
) .4
16
(.037
)***
.832
(.0
96)*
**
.191
(.0
35)*
**
1.05
5 (.0
59)*
* � 6
(gen
der)
-.1
57
(.055
)***
-.261
(.0
04)*
**
-.252
(.0
55)*
**
-.072
(.0
72)
� 7 (a
ge)
-.016
(.0
01)*
**
-.0
02
(.001
)*
-.007
(.0
01)*
**
-.008
(.0
02)*
**
� 8 (b
anne
r rec
all)
--
.135
(.0
24)*
**
--
.0
79
(.012
)***
� 00 (in
terc
ept)
.099
(.3
21)
-1
.257
(.3
94)*
**
-.309
(.1
98)*
* -.2
45
(.717
) � 0
1 (b
rand
pop
ular
ity)
.7
78
(.430
)*
.2
32
(.969
) .4
66
(.356
)*
2.48
3 (.9
63)*
**
� 02 (d
umm
y –
non-
dura
ble
) -.4
30
(.281
)**
-.4
90
(.623
) -.5
71
(.218
)***
.6
68
(.552
) � 0
3 (d
umm
y - d
urab
le)
-.050
(.3
38)
-1
.501
(.6
60)*
**
-.397
(.2
40)*
* -.0
17
(.779
) u 0
j .1
73
(.088
)***
.888
(.0
88)*
**
.148
(.0
74)*
* .7
30
(.685
)
Indi
rect
effe
cts
� 1x � 8
(num
ber o
f exp
osur
es)
--
.010
(.0
04)*
**
--
.0
03
(.002
)**
� 2 x
�8 (m
easu
rem
ent d
elay
)
-
-
-.0
04
(.001
)***
--
-.0
02
(.001
)***
� 3 x
�8 (s
paci
ng -
linea
r)
- -
-.003
(.0
03)
--
-.002
6 (.0
015)
**
� 4 x
�8 (s
paci
ng -
quad
ratic
)
--
-.0
01
(.001
)
--
-.0
004
(.000
2)**
N
ote:
O
ne-ta
iled
test
ing
* p-
valu
e <
0.1
** p
-val
ue <
0.0
5 **
* p-
valu
e <
0.01
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The Effect of Banner Exposures on Consumer Memory
27
Note: spacing has only marginal effect on banner recall, therefore not depicted in the graph. Figure 2.4. Effect of Spacing on Probability to Recognize the Banner
Effect of delay in measurement. We find a significant negative direct effect of
measurement delay on banner memory ( 2 = -0.030, p = 0.006 for banner
recall; 2 = -0.022, p = 0.006 for banner recognition), but not on brand memory
( 2 = -0.002, p = 0.002 for brand recall; 2 = -0.006, p = 0.007 for brand
recognition). Hence, Hypothesis 3 is supported only for banner memory (H3a).
As expected, the delay between the last banner exposure and the measurement
of memory for the banner has a significant negative effect on the probability of
recalling or recognizing the banner.
We also find indirect effects of measurement delay on brand recall ( 2 x
8 = - 0.004, p < 0.001) and brand recognition ( 2 x 8 = - 0.002, p = 0.007) to
be significant. Hence, with regard to Hypothesis 4c, the effect of measurement
delay on brand memory is mediated by banner memory. This result shows
decay in brand memory is affected by the inability to remember the banner as a
cue for recalling or recognizing the brand.
Differential effects of exposure variables on recall and recognition. We find
no major differences in the effect of exposure variables between recall and
0,27
0,275
0,28
0,285
0,29
0,295
0,3
0,305
0,31
0,315
0,32
1 25 50 75 100 125 150 175 200 225 250 275 300 325 350 375
Prob
abili
ty
Spacing time (in minutes)
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Chapter 2
28
recognition. Specifically, the effect of measurement delay on banner recall (β =
- 0.030, p < 0.001) is comparable to that on banner recognition (β = - 0.022, p <
0.001). Figure 2.5 depicts the effects of varying levels of measurement delay
on the probability to recall and recognize the banner, holding the effects of
other variables constant. Although the point estimates of the effect of exposure
variables on recall are different from those of recognition (see Table 2.2), these
differences are not statistically significant. Because both recall and recognition
models have the same set of independent variables and both the dependent
variables on recall and recognition models have the same scales, testing the
differential effects of each exposure variable on recall and recognition is
straightforward. By holding all other independent variables constant, we use a
t-test to determine whether one unit increase of a particular exposure variable
will result in a different increase on the recall and the recognition odds ratio.
The results of these t-tests are insignificant, with p > 0.05. Hence, the
magnitudes of the effects of exposure variables on recall and recognition are
not statistically different.
Figure 2.5. Effect of Measurement Delay on Probability to Recall and Recognize the Banner
0
0,05
0,1
0,15
0,2
0,25
0,3
0,35
Prob
abili
ty
Measurement Delay (in minutes)
Recognition
Recall
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The Effect of Banner Exposures on Consumer Memory
29
Relationship between banner memory and brand memory. There is a
significant relationship between banner memory and brand memory measured
by recall (β = 0.135, p < 0.001), showing the probability of recalling a brand is
significantly higher when a consumer can recall the banner for the brand. A
similar relationship is found when memory is measured by recognition (β =
0.079, p < 0.001). Furthermore, the β for recall is higher than the corresponding
β for recognition, showing the relationship between banner memory and brand
memory is stronger when memory is measured by recall, though it is
marginally significant (p = 0.068).
Control variable (e.g., age, gender, product category) results. Users are
expected to have better recall and recognition of the brand than non-users. Our
analyses confirm this prediction by revealing brand usage is a positive and
significant predictor of both brand recall (t = 8.67, p < 0.001) and brand
recognition (t = 17.88, p < 0.001). In line with Campbell & Keller (2003), our
analyses also show experience with the brand significantly increases banner
recall (t = 11.24, p < 0.01) and banner recognition (t = 5.45, p < 0.001).
Furthermore, our analyses suggest male consumers have better memory
for both banner advertisements and brands. All coefficients for the dummy
variable ‘gender,’ except for brand recognition, are significantly negative
(Table 2.2). One possible explanation for this result is that males tend to use
cognition more than emotion when processing an advertisement (Meyers-Levy
and Maheswaran, 1991; Meyers-Levy and Sternthal, 1991). However, because
we do not have information about banner content in our study, we cannot make
conclusions about the causes of this gender difference.
With regard to age, it is widely accepted that the ability to memorize
decreases with age. Some studies in advertising literature (for example, Cole
and Houston, 1987) document that elderly people have deficits in learning
advertising messages and consequently perform worse on advertising memory
tests. Our analyses show age has a strongly significant negative effect on brand
and banner memory (see Table 2.2).
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Chapter 2
30
In summary, the parameters for the control variables add to the face
validity of our model results.
2.5 Discussion 2.5.1 Key Findings Advertising scheduling is an important issue for both marketing researchers
and practitioners. With the advent of the Internet, this issue has become even
more important because the Internet provides sophisticated technologies to
control when, which, and how often customers are exposed to advertisements
such as banners. This study offers new insights on the effects of banner
exposures and provides guidance for formulating effective banner scheduling
strategies. We examine the effects of various aspects of banner exposures,
including the number of exposures, spacing (interval between exposures), and
measurement delay, on consumer memory of banner and brand. Our analyses
lead to five major findings.
First, the number of banner exposures has a direct positive effect on
consumer memory of the banner, which in turn enhances consumer memory for
the advertised brand. This effect is found for both recognition and recall, and
the magnitude of the effect is similar for both. A possible explanation for this
finding is that the correlation between recognition and recall is especially high
on stimuli (brands) with high recall scores (Laurent et al., 1985). The average
brand recall in our study is 51%. When consumers recognize a stimulus
(brand), they are also likely to recall the stimulus (brand). Furthermore, the
positive linear effect of the log of number of exposures on memory implies the
effect does not wear out completely, although the effect diminishes as the
number of exposures increases. Previous research on advertising response
(especially in laboratory experiments, where subjects are required to process
advertising) suggests wear-out occurs when consumers get tired of being
exposed to advertising, although this wear-out effect is less apparent in actual
advertising campaigns with voluntary attention to advertising (Pechmann and
Stewart, 1989). Our findings confirm wear-out does not occur in actual banner
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The Effect of Banner Exposures on Consumer Memory
31
campaigns. We also confirm results from earlier experimental banner
advertising studies (Drèze and Hussherr, 2003; Havlena and Graham, 2004)
that show banner exposures increase brand awareness. This finding is
important because it challenges the prediction of a decade ago that when
consumers became more adept at using the Internet, they would become more
skilled in filtering out unimportant information such as banner advertisements
(Dahlen, 2001). Our findings demonstrate that ten years later, in an age of
Internet adeptness, the effect of banner advertising on consumer memory is still
significant and positive.
Second, we also find there is a spacing effect for banner advertising; it is
likely the result of the study-phase retrieval mechanism. The spacing effect is
greatest for enhancing consumer memory for the banner and the brand, when
the time interval is not too short or too long. However, we find the spacing
effect for recognition only, not recall. This is an unexpected finding, because
previous research that found the spacing effect in advertising (e.g., Appleton-
Knapp et al., 2005; Heflin and Haygood, 1985) also used recall as a memory
measure. Our finding is perhaps due to the study setting: both Appleton-Knapp
et al. (2005) and Heflin and Haygood (1985) conducted studies in laboratory
settings in which the subjects were required to process advertising, whereas in
our study processing was voluntary. In real life, consumers often pay little
attention to advertising, which may result in weaker effects of advertising on
memory (Pechmann and Stewart, 1989). Our finding also shows the spacing
effect is not strong enough to provide recall benefits from spacing. Recall is
more difficult than recognition; it requires more memory traces than can be
provided by the spacing effect of banner exposures.
Third, the effect of memory enhancement from banner exposures decays
significantly over time for both recall and recognition, in contrast to the
common belief that recognition does not decay (Lucas, 1960). Our finding is
consistent with the Singh et al. (1988) study of television advertising.
Furthermore, in the context of banner advertising, this finding contrasts with
work of Havlena and Graham (2004), who found no significant negative effect
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Chapter 2
32
of measurement delay on banner and brand awareness. The small effect of
measurement delay on banner memory might explain their findings: with β = -
0.030, after a one-day delay the decrease in recall probability is only about
three percent (see Figure 2.5).
Fourth, with regard to the mediating role of banner memory, our
analyses show (1) significant direct effects of banner exposure variables on
banner recall and recognition (2) insignificant direct effects of banner exposure
variables on brand recall and recognition, and (3) significant indirect effects of
banner exposure variables on brand recall and recognition (except spacing on
brand recall). Following the typology of mediations proposed by Zhao et al.
(2010), these results suggest an indirect-only mediation, or a full mediation
according to the terminology of Baron and Kenny (1986). In indirect-only
mediation, the presence of omitted mediators is unlikely. This indicates that
instilling consumer memory of the banner advertisement itself is vital to the
success of campaigns that seek to enhance consumer memory for the brand: to
create stimulate brand memory, the banner must be processed by the consumer,
with sufficient cognitive resources. Banners that fail to attract attention, or are
only minimally processed, do not improve the recall and recognition of the
brand they advertise. We also find the relationship between banner and brand
memory is stronger when memory is measured through recall. A possible
explanation for this finding is that memory tests show recall is more difficult
than recognition (Krishnan and Chakravarti, 1999; Laurent et al., 1995; Singh
and Rothschild, 1983). Recall of a stimulus requires deeper memory than
recognition of the stimulus. When consumers profoundly remember
advertisements and their features (for example, product images, logo), they are
more likely to recall the associated advertising brand when asked to name one
brand in the product category.
Fifth, the effects of the exposure variables are similar for recall and
recognition. Singh et al. (1988) asserted recognition is more able than recall to
access the tinier traces of memory, implying (i) less number of exposures is
needed for recognition than for recall and (ii) recognition decay is less than
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The Effect of Banner Exposures on Consumer Memory
33
recall decay. We take a cautious stand in this discussion because the brands in
our study have a relatively high level of familiarity. Because such brands
already have strong memory traces in consumer minds, the differential impact
of their banner exposures on recall and recognition might not be observed.
In summary, the exposure effects we find are mostly similar to those
found in previous studies of both banner advertising and traditional media. The
main difference in our findings is that contrary to studies that show banners
directly affect brand memory, our study does not find a direct effect of banner
exposures on brand memory. Instead, we find this effect is indirect and
mediated by banner memory. Our study shows the success of banner
advertising depends on consumer memory of the banner itself, in addition to
memory of specific advertising messages, such as brand name and brand
claims, contained within the banner.
2.5.2 Practical Implication Our findings also have practical implications. First, recall and recognition are
both important for measuring the impact of advertising on consumer brand
choice. A consumer’s brand choice decision is affected by brand memory
(Fennis and Stroebe, 2010). On one hand, recall is more relevant when brand
decision-making happens in the absence of the stimulus. On the other hand,
when the brand choice decision must be made in the presence of the stimulus
(for example, when choosing a brand of canned soup in a supermarket),
recognition is more important. Our study finds both brand recall and
recognition are enhanced by banner exposures; product choices made in either
memory-based (for example, durable products) or stimulus-based (for example
nondurable products) decision-making situations can be influenced by banner
advertisements. Furthermore, our finding with regard to the exposures response
curve implies brands will not suffer from too many banner exposures. The
impact of overexposure is limited to budget efficiency because the response
curve shows diminishing returns.
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Chapter 2
34
Second, the interval between subsequent banner exposures must not be
too long or too short; banner exposures should be moderately spaced. Our
analyses provide initial interval estimates that suggest a one-hour interval
between exposures is optimal. This estimate can be used as a basis for
determining the optimal interval in a specific situation. Companies may also
take into account the effect of other factors that determine optimal spacing,
such as advertising clutter from similar products and demographics of the
target audience. Once the optimal spacing target has been determined using
available Internet advertising technologies (e.g., Plummer et al., 2007), targeted
optimal spacing can be attained without major difficulty.
Third, we examined the impact of the time interval between last
exposure and response measurement. In practice, this interval may refer to the
time between last exposure and the moment when the actual buying decision is
made. Our findings clearly show the delay between the last banner exposure
and the buying decision time should be short enough to ensure the effect gained
from banner exposures has not decayed too much. For example, by using IP
recognition technology and cookies information, a company can plan the next
exposure before further decay occurs. The finding that memory of banner
exposure decays also implies that the current practice of some advertising
research agencies— the testing of banner effectiveness by measuring
effectiveness directly after exposure—may overestimate the impact of banners
on purchase decisions by failing to take into account the effect of memory
decay.
By relating these three implications to existing advertising scheduling
strategies from marketing literature, we can conclude that even, rather than
massed (blitz), banner scheduling, is the best scheduling strategy for banner
advertising. More specifically, our model and findings can be used as a starting
point to build a mathematical model to optimize banner advertising spending
(i.e., number of exposures and when to deliver), given the purchase cycle and
advertising cost per exposure.
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The Effect of Banner Exposures on Consumer Memory
35
Another practical implication of our findings is that because the effect of
exposures is mediated by banner memory, it is important to have banners that
capture consumer attention. Banners that that do not stand out are not
remembered and will have no effect in enhancing brand memory.
2.5.3 Research Limitations and Future Research Our study has several limitations. First, our dataset, although extensive with
almost 9,000 consumers from seven countries, is drawn mainly from banner
advertising campaigns for established brands. This may limit the applicability
of our findings with regard to banner advertising that promotes new brands. For
example, established brands may limit the effect of exposures variables on
brand memory due to ceiling effects (Singh et al., 1988). Future research could
address this issue by determining whether brand familiarity moderates the
effects of banner exposures found in this study.
Another limitation is that we did not include banner design factors, such
as size or shape, position on a webpage, and interactivity (i.e., static or
animated) because this information was not available. Previous studies on
banner advertising have found design factors may impact banner effectiveness.
For example, a recent study by Draganska, Hartmann, and Stanglein (2014)
showed that different online advertisements had different effects on lifting
consumers recall of brand message. It would be interesting to uncover which
design factors moderate the relationships we found in our study.
Both our limitations and our findings suggest avenues for future
research. First, having demonstrated that banner exposures improve brand
awareness, we question how to achieve maximum improvement. Based on our
findings, we recommend an even, continuous advertising schedule as the best
banner advertising scheduling strategy. It would be interesting to study not
only the factors that influence optimal spacing, but also the optimal number of
exposures, the factors that influence decay rate, and ways in which firms can
minimize the impact of memory decay by tying banner exposures more closely
to consumer decision-making.
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Chapter 2
36
Second, although our study has shown how various aspects of banner
exposures affect brand recall and recognition, the question of how these aspects
affect brand attitudes remains. Earlier research indicates banner exposures may
improve brand attitudes, but more specific effects of exposure characteristics,
such as the number of exposures, spacing, and measurement delay are still
unknown. This issue is important to address; if brand attitudes wear out, gains
in enhanced brand awareness from, for example, a high number of banner
exposures might be offset by declines in brand attitude due to boredom.
Finally, future research could address the effect of banner exposure
characteristics on cross-media synergy (Naik and Peters, 2009). Different
banner exposure characteristics may have different cross-media effects.
However, future research could examine advertising effectiveness
consequences of exposure scheduling within and across multiple media.
Empirical study of differential effects of exposure characteristics on media
synergy will help companies with their integrated marketing communication
strategies, especially with scheduling of multi-media advertising campaigns.
Findings from our study can serve as starting point for this empirical research
avenue.
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Ad and Brand Metrics for Banner Advertising Effectiveness
37
Chapter 3 Ad and Brand Metrics for Banner Advertising Effectiveness
3.1 Introduction In the early days of the Internet, banner advertising studies focused on direct
responses from consumers, in the form of the clickthrough rate. When consumers
became more experienced users, they no longer perceived banners as novel or
interesting and stopped clicking them, such that clickthrough rates declined from 7 %
in 1997 (Drèze and Hussherr, 2003) to just .06 % in 2014 (Chaffey, 2015). Yet banner
advertising spending continues to increase. In 2014, U.S. banner advertising generated
$ 8.0 billion (IAB, 2015), a four-fold increase from $ 1.9 billion in 2010 (IAB, 2011).
Banner advertising accounted for 16% of total Internet advertising in 2014 (IAB,
2015). Therefore, banner effectiveness studies need to focus on a broader set of
effects, including brand metrics (Hollis, 2005). Drèze and Hussherr (2003)
recommend traditional measures, such as brand awareness and advertising recall.
Comparable to offline advertising, banner advertising could have indirect effects on
consumer purchasing, through improved brand awareness and brand attitude. To
uncover these potential indirect effects of banner advertising, we seek to determine the
interrelated changes in a range of advertising and brand metrics.
Previous research links banner exposures to various effectiveness measures,
including consumer attitudes toward the ad and the brand (Briggs and Hollis, 1997;,
Yoo, 2008); advertising recall, brand recall, and brand recognition (Drèze and
Hussherr, 2003; Yaveroglu and Donthu, 2008); and repeat purchase intentions
(Manchanda et al., 2006). Most studies examine only one or a few banner
effectiveness metrics though, so we lack understanding of how banner advertising,
through various intermediate and interrelated advertising and brand metrics, affects
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Chapter 3
38
purchase intention. Instead, these interrelationships have been studied extensively for
traditional media, such as television and print advertising (Brown and Stayman, 1992;
MacKenzie et al., 1986; Vakratsas and Ambler, 1999). From both academic and
practical points of view, it is important to understand the interrelationships among
effect measures for banner advertising, because of the differences in consumer
information processing in different media (Chaudhuri and Buck, 1995; De Pelsmacker
et al., 2002).
The goal of this study is to determine interrelationships among advertising and
brand metrics in banner advertising. In pursuit of this goal, this study makes three key
contributions to advertising literature. First, we build on previous research that has
investigated separate relations between banner advertising and individual metrics to
develop and test a comprehensive model linking banner memory and attitude to brand
memory and attitude, and ultimately to brand purchase intentions. We find that banner
advertising —through banner memory, banner attitude, brand memory, and brand
attitude— indirectly affects purchase intentions positively. Second, we compare these
relationships with those established for traditional advertising (Brown and Stayman,
1992), as in the dual mediation model. The indirect effect of banner advertising is
similar but not identical to that established for advertising in traditional media.
Futhermore, by examining alternative paths for the indirect relationships, we find that,
whereas in traditional media advertising attitude has a stronger effect on brand attitude
than does brand cognition/memory, in banner advertising the effects of banner attitude
and brand memory on brand attitude are similar.
Beyond these theoretical contributions, our findings have practical relevance.
Knowledge of the influential processes that arise between banner exposures and
consumer actions help managers design banner advertising strategies. For example, by
realizing the extent to which banner memory affects brand attitudes through both
banner attitudes and brand awareness, managers can weigh the beneficial and
detrimental effects of “annoying” banner designs on users’ attitudes toward the brand.
In the next section, we discuss banner and brand effectiveness measures from
previous studies and their interrelations in traditional media advertising. On the basis
of our discussion of differences in processing banner versus traditional advertising and
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Ad and Brand Metrics for Banner Advertising Effectiveness
39
findings from previous studies on banner advertising, we propose a model of the
relationships between banner and brand constructs for banner advertising. In the
following section, we provide the details of our field study and data collection from
almost 20,000 consumers. Following the empirical analyses, we discuss the findings
and their implication for theory and practice. This article concludes with presenting
limitations and directions for further research.
3.2 Theoretical Background 3.2.1 Indirect Effect of Advertising on Sales
Many advertising and brand metrics have been proposed and studied in advertising
and marketing literature. These metrics generally constitute five major categories:
advertising cognition/memory, advertising attitude, brand cognition/memory, brand
attitude, and purchase intentions (Brown and Stayman, 1992; Vakratsas and Ambler,
1999). Many comparable measures also have appeared in banner advertising studies,
such as banner recall, banner recognition, banner attitude, and brand awareness
(Chatterjee, 2008; Yaveroglu and Donthu, 2009; Yoo, 2008).
Studies of traditional print and television advertising describe complex
interdependent relationships among these metrics. In general, advertising and brand
attitude depend on advertising and brand cognitive responses, such as recall of the
advertising or the brand (Brown and Stayman, 1992, MacKenzie et al., 1986). In
addition, brand attitude may be influenced by advertising attitude. According to the
elaboration likelihood model (ELM), when the motivation to process the brand is low,
consumers use peripheral cues about the ad to form their brand attitude (Petty et al.,
1983). In turn, brand attitude affects purchase intentions and, ultimately, actual
behavior. For example, recent research (Bruce, Peters, and Naik, 2012) shows that
advertising can increase sales through intermediate effects of mind-set metrics. This
structuring of relationships among advertising and brand metrics into sequential stages
that lead to actual behavior is known as a hierarchy-of-effects model. Although
subject to some criticisms (Barry and Howard, 1990; Vakratsas and Ambler, 1999;
Weilbacher, 2001), it has been used widely to explicate the advertising
communication process from the consumer perspective, as a series of psychological
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Chapter 3
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steps (Shimp, 2008 p.147). We examine a general version of this hierarchy-of-effects
model for banner advertising (Figure 3.1) and elaborate on each of the relationships
depicted in the model, in the context of banner advertising.
3.2.2. Hypotheses
3.2.2.1. Effect of Banner Memory on Banner Attitude
Banner advertisements may attract attention from consumers, who then are
stimulated to process the information, which leads to stronger banner memory.
Remembering the banner means that consumers can access their own cognitive
reactions to the banner, which enhances their banner attitudes. In traditonal research,
Mackenzie and Lutz (1989) demonstrate that ad cognitions are antecedents of ad
attitude. However, empirical research on banner advertising offers equivocal results
regarding the relationship between banner memory and banner attitude. Yoo (2008)
finds that banner exposures can improve attitudes toward the advertisement, even
when the banner cannot be recalled, sugesting that there is no explicit relationship
BannerMemoryBanner
Memory
BrandMemoryBrand
Memory
BannerAttitudeBanner Attitude
BrandAttitudeBrand
AttitudePurchaseIntentionPurchase Intention
H1
H4
H2 H3
H5
ovariatesCovariates CovariatesCovariates
CovariatesCovariates CovariatesCovariates CovariatesCovariates
Covariates:- Usage- Gender-Age
Covariates:- Usage- Gender-Age
Figure 3.1. Structural model of the hypotheses
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Ad and Brand Metrics for Banner Advertising Effectiveness
41
between banner memory and banner attitude. Yoo and Kim (2005) indicate that the
relationship is complex and moderated by the level of arousal ignited by the banner,
such that too much arousal (e.g. from animation) may initiate unpleasant feelings and
negatively affect attitudes. As we examine static banners, which induce cognitive
processes similar to that prompted by print advertising, we propose the following
relationship:
Hypothesis 1: Banner memory has a positive relationship with banner attitude
3.2.2.2. Effect of Banner Memory on Brand Memory
Although banner advertising research indicates that banner exposures increase both
banner and brand awareness (Drèze and Hussherr, 2003, Havlena and Graham, 2004),
prior studies have not investigated the relationship between these metrics. For
traditional media, Schmitt et al. (1993) show that pictorials have better mnemonic
values and are easier to remember. Using eye tracking methods, Wedel and Pieters
(2000) find that the more attention a consumer pays to pictorials and other
advertisement elements related to the brand, the better he or she remembers the brand.
Because banners mostly consist of pictorials, such as logos, symbols, and pictures or
photos of endorsers, banner exposures should strengthen consumers’ memory of the
pictorials. Familiar brands may benefit from an already established associative
network between the brand and its brand-related pictorials too (du Plessis, 2008), so
banner exposures should make such brands even more salient. The activation of
memory nodes for the pictorials subsequently will activate memory for the brand in
the associative network. Therefore, we hypothesize:
Hypothesis 2: Banner memory has a positive relationship with brand memory.
3.2.2.3. Effects of Brand Memory on Brand Attitude
Consumers evaluate brands based not only on information about the brand itself but
also on how they feel when processing information about the brand. The ease of
information processing might serve as a signal for a positive evaluation of the brand
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Chapter 3
42
(Barry and Howard, 1990, Mantonakis et al., 2008). Brands that are easily retrieved
from memory evoke better evaluations than brands that do not readily come to mind,
especially in low level processing situations (Nordhielm, 2002). However, prior
negative associations might interfere with this fluency effect (Lee and Labroo, 2004).
Because we focus on established brands, we assume they generally do not have
substantially negative associations. Furthermore, the processing level of brand
information in a banner is mostly low, so we hypothesize:
Hypothesis 3: Brand memory has a positive relationship with brand attitude.
3.2.2.4. Effects of Banner Attitude on Brand Attitude
In traditional media, brand attitude generally is influenced by advertising attitude. A
mechanism that seeks to explain this relationship is the affect transfer hypothesis
(MacKenzie et al., 1986), which states that affective responses to advertising transfer
to the brand, following a peripheral route in the ELM. Consumers usually process
banners at a pre-attentive level (Chatterjee, 2008; Yoo, 2008), so peripheral brand
processing likely takes place when consumers try to form attitudes using knowledge
about the brand that they learned from banner advertising. The peripheral cues might
include banner attractiveness, likeability, or believeability, which in general determine
the consumers’ attitude toward the banner. We thus predict a positive effect.
Hypothesis 4: Banner attitude has a positive relationship with brand attitude.
3.2.2.5. Effects of Brand Attitude on Purchase Intention
The role of brand attitude in predicting consumer behavior has been long
acknowledged in marketing literature (see e.g. Mitchell & Olson, 1981; Bian &
Moutinho, 2011; Zarantonello & Schmitt, 2010). Therefore, advertising research on
traditional media frequently includes the relationship between attitude toward the
brand and brand purchase intention (e.g., Brown & Stayman, 1992; Keller & Aaker,
1992; Morwitz et al., 1993). In traditional advertising consumer motivation to process
advertising is generally high, which is in contrast to banner advertising. However, the
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Ad and Brand Metrics for Banner Advertising Effectiveness
43
effect of brand attitude on purchase intention is not affected by how the consumer
processed the advertising, although when the motivation to evaluate the brand is
higher, the effect of brand attitude on purchase intention becomes even higher
(MacKenzie & Spreng, 1992). Therefore, though we do not expect the relationship of
brand attitude and purchase intention to be as strong as it would be in advertising
processed with high motivation, here brand attitude still have a positive effect on
purchase intentions.
Hypothesis 5: Brand attitude has a positive relationship with purchase intentions.
3.2.2.6. Covariates
In addition to these hypothesized effects, banner effectiveness metrics may be
influenced by other factors related to the brand and the consumer. Campbell and
Keller (2003) show that the effect of advertising on attitude toward the advertising is
greater for familiar than for less familiar brands. For familiar brands, brand attitude
depends more on brand memory, rather than advertising attitude, whereas for less
familiar brands, advertising attitude has a greater impact on brand attitude.
Furthermore, users or past users of a brand may remember and like the brand better
than nonusers. They may also have different goals in processing the banners, which in
turn can affect the effectiveness of the banners (Wang et al., 2009). Therefore, we
include experience with the brand to control for the effect of brand familiarity on
advertising and brand metrics.
Previous research also shows that consumer memory for advertising or brands
is affected by individual characteristics such as age and gender (Krishnan and
Chakravarti, 1999). Specifically, younger consumers have better memory for
advertising (Cole and Houston, 1997), and consumers of different genders engage in
unique cognitive advertising processing (Meyers-Levy and Maheswaran, 1991;
Meyers-Levy and Sternthal, 1991). Age and gender also may affect banner and brand
attitudes, because some campaigns and brands target specific market segments.
Younger consumers thus may have a different attitude toward the advertising or the
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Chapter 3
44
brand than older consumers, as might consumers of different genders. Therefore, we
include gender and age as covariates in our model.
3.3. Empirical Study Design 3.3.1. Survey Procedure and Sample Description The data we used to test our hypotheses consist of surveys of 29 banner advertising
campaigns that involved mostly well-known brands in 10 European and Latin
America countries: Belgium, Finland, France, Germany, Italy, Mexico, The
Netherlands, Norway, Spain, and the United Kingdom. For each campaign, potential
respondents were invited randomly from the company panel of respondents who were
visiting websites on which the banners for a particular brand had been placed during
the brand campaign. The profile of invited respondents was matched to the defined
profile of the brand target customers. Upon a potential respondent accepted the
invitation, he or she was presented with a set of questions measuring the brand and ad
metrics used in this study. Furthermore, using proprietary tagging technology, we
could identify if respondents had been exposed to the particular banner or not. For this
study, we only used data from respondents who had been exposed to the banner. The
survey was conducted by MetrixLab, a leading global online market research
company.
In total, the data set contains 19,994 respondents. The smallest sample size for
any individual campaign is 72 respondents, and the largest is 2,281 respondents.
Almost 73% of the respondents are women, largely because some of the focal
campaigns targeted women only (e.g., beauty and personal care brands). The average
age of the respondents is 36.5 years. Though the demographic characterics of the
sample are different from those of the general population, for each campaign they are
similar to the demographic characteristics of the targeted brand. This is because the
respondents were invited selectively to match with the defined profile of the brand
target customers.
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Ad and Brand Metrics for Banner Advertising Effectiveness
45
3.3.2. Banner and Brand Effectiveness Measures
The campaign surveys used online, semi-standardized questionnaires that contained
various advertising effect measures, demographic questions, and items pertaining to
the product category, brand, and banner. The questions relevant for our study were
standardized across all campaigns. Table 3.1 contains the list of brand and advertising
indicators; we explain the measures for each construct, as well as the rationale for
including these indicators, next.
To measure banner memory and brand memory, we used recall and recognition
measures (Table 3.1). Both recall and recognition have been used widely to measure
the effect of advertising on consumer memory (du Plessis, 1994). The basic difference
is whether the stimulus, as the retrieval target, appears during the test or not: The
stimulus appears in a recognition test but not in a recall test, so these measures may
pertain to different dimensions of memory (Finn, 1992). However, Bagozzi and Silk
(1983) argue that recall and recognition represent a single memory state, if we control
for the effect of variation in reader interest. Therefore, we use recall and recognition
as indicators of memory construct for a particular banner or brand. In the context of
banner advertising studies, banner recall (Yaveroglu and Donthu, 2008) and banner
recognition (Drèze and Hussherr, 2003) similarly can measure the effect of banner
exposures on banner memory (Chatterjee, 2008; Havlena and Graham, 2004).
Previous studies have used many indicators to measure advertising attitude,
such as advertising favorability, attractiveness, and likeability (MacKenzie and Lutz,
1989; MacKenzie et al., 1986; Yoo, 2008). Therefore, we use multiple indicators to
measure the various aspects of banner attitude, including questions about banner
likeability and the extent to which the banner is striking to measure the affective
aspect, as well as banner relevance, believability, and curiosity to measure the
cognitive aspect. Our scales are adapted from scales widely used to measure general
attitude toward the ad (Bruner, 2009 p.97-98). With a Cronbach-alpha of 0.695, the
reliability of our adapted scales is within an acceptable range (Garson, 2013),
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Tab
le 3
.1. M
odel
con
stru
cts,
indi
cato
rs, s
cale
s, an
d de
scri
ptiv
e st
atis
tics
Con
stru
ct
Indi
cato
r Su
rvey
Que
stio
n
Scal
e an
d C
odin
g M
ean
SD
Bra
nd
mem
ory
Bra
nd re
call
W
hich
bra
nds o
f [pr
oduc
t cat
egor
y] th
at y
ou c
an th
ink
of?
Bin
ary
0: T
arge
t bra
nd is
not
in th
e lis
t 1:
Tar
get b
rand
is in
the
list
0.51
0.
50
Bra
nd
reco
gniti
on
Hav
e yo
u he
ard
of a
ny o
f the
follo
win
g [p
rodu
ct c
ateg
ory]
bra
nds?
B
inar
y 0:
No
1
: Yes
0.
79
0.41
Bra
nd
attit
ude
B
rand
fa
vora
bilit
y
How
wou
ld y
ou d
escr
ibe
your
ove
rall
opin
ion
of th
e fo
llow
ing
[pro
duct
cat
egor
y] b
rand
s?
Plea
se p
rovi
de u
s with
you
r ove
rall
opin
ion,
eve
n if
you
have
nev
er u
sed
this
pro
duct
bef
ore
Like
rt (1
-5)
1: V
ery
unfa
vora
ble
5: V
ery
favo
rabl
e
3.41
1.
15
Bra
nd
cons
ider
atio
n
If yo
u w
ere
look
ing
to p
urch
ase
[pro
duct
cat
egor
y], h
ow li
kely
wou
ld y
ou b
e to
con
sider
ea
ch o
f the
follo
win
g br
ands
B
inar
y 0:
Wou
ld n
ot c
onsid
er p
urch
asin
g 1:
Wou
ld c
onsi
der p
urch
asin
g
0.48
0.
50
Ban
ner
mem
ory
Ban
ner r
ecal
l W
here
, if a
t all,
hav
e yo
u se
en, h
eard
, or r
ead
any
adve
rtisi
ng fo
r [br
and]
rece
ntly
? B
inar
y 0:
The
Inte
rnet
is n
ot in
the
list
1: T
he In
tern
et is
in th
e lis
t
0.22
0.
41
Ban
ner
reco
gniti
on
Plea
se h
ave
a lo
ok a
t the
follo
win
g ad
verti
sing
[a b
anne
r is s
how
n]. D
o yo
u re
call
seei
ng a
n ad
verti
sing
sim
ilar t
o th
e on
e sh
own
abov
e on
the
inte
rnet
? B
inar
y 0:
No
1
: Yes
0.
31
0.46
Ban
ner
attit
ude
Ban
ner
likea
bilit
y
Ove
rall,
I lik
e th
e ad
verti
sing
Li
kert
(1-5
) 1:
Stro
ngly
dis
agre
e 5:
Stro
ngly
agr
ee
3.25
1.
03
Ban
ner
rele
vanc
y Th
e ba
nner
was
rele
vant
to m
y ne
eds
Like
rt (1
-5)
1: S
trong
ly d
isag
ree
5: S
trong
ly a
gree
2.81
1.
03
Ban
ner
strik
ingn
ess
The
bann
er w
as d
iffer
ent f
rom
oth
er [p
rodu
ct c
ateg
ory]
ads
Li
kert
(1-5
) 1:
Stro
ngly
dis
agre
e 5:
Stro
ngly
agr
ee
3.22
1.
05
Ban
ner
belie
veab
ility
Th
e ba
nner
was
bel
ieva
ble
Like
rt (1
-5)
1: S
trong
ly d
isag
ree
5: S
trong
ly a
gree
2.67
1.
20
Ban
ner
curio
sity
Th
e ba
nner
mak
es m
e w
ant t
o fin
d ou
t mor
e ab
out [
bran
d]
Like
rt (1
-5)
1: S
trong
ly d
isag
ree
5: S
trong
ly a
gree
3.10
1.
01
Purc
hase
in
tent
ion
Purc
hase
in
tent
ion
Con
side
ring
ever
ythi
ng y
ou k
now
abo
ut [b
rand
], ho
w li
kely
wou
ld y
ou b
e in
pur
chas
ing
this
pro
duct
, if y
ou w
ere
look
ing
for [
prod
uct c
ateg
ory]
?
Bin
ary:
0:
Wou
ld n
ot p
urch
ase
one
1: W
ould
pur
chas
e on
e
0.37
0.
48
Cova
riate
s
Use
Do
you
have
exp
erie
nces
with
[bra
nd]?
B
inar
y:
0: N
o, I
do n
ot
1:
Yes
, I d
o 0.
31
0.46
Age
How
old
are
you
? In
yea
rs
36.5
4 13
.40
Gen
der
W
hat i
s you
r gen
der?
B
inar
y:
0: M
ale
1: F
emal
e 0.
72
0.
44
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Ad and Brand Metrics for Banner Advertising Effectiveness
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Similar to the banner attitude construct, brand attitude comprises two aspects: cognitive
and affective (Percy and Elliott, 2005). Following this line of research, we use brand
consideration to measure the cognitive aspect and brand favorability to measure the
affective aspect of brand attitude (see also Putrevu & Lord, 1994). Finally, we measured
purchase intention with a question about whether the respondent would buy the brand on
the next purchase occasion. There are several items to measure behavioral intention used
in marketing literature (Bruner, James, and Hensel, 2001), but most of the study include
the question similar to ‘how likely will you purchase the brand/product’. Therefore, we
believe the our single item here has the predictive validity of purchase intention (see also
Bergkvist & Rossiter, 2007). Since we borrow the scales from various advertising studies
on traditional media, we test the unidimensionality of these scales later in our
measurement model analysis.
As we show in Table 3.1, an average of 22%(31%) of the respondents recalled
(recognized) the banner to which they had been exposed. With respect to banner attitude,
the average scores ranged from 2.67 for banner believeability to 3.25 for banner
likeability. These scores varied strongly across campaigns; for example the lowest
average score for banner curiosity was 1.78, whereas the highest campaign average was
3.57. On average, 51% of the respondents could recall and 79% recognized the brands we
studied. The brands scored 3.41 on brand favorability on average, and 48% of
respondents reported that they would consider and 37% that they intended to buy the
brand.
3.4 Data Analysis To test the relationships among constructs, measured using indicator variables (Figure
3.1), we applied structural equation modeling (SEM). We used SEM because our model
consists of latent constructs and we want to test the relationships simultaneously.
Previous research testing relationships among advertising and brand constructs also used
SEM (for example: MacKenzie and Lutz, 1989; Brown and Stayman, 1992). However,
three characteristics of the data demand special consideration: (1) clustered observations
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Chapter 3
48
in campaigns, (2) variables that are categorical instead of continuous, and (3) the
prevalence of missing values.
3.4.1 Multilevel SEM for Clustered Observations Our database revealed a hierarchical structure: The observations of individual
respondents are clustered in campaigns. We therefore expect that unobserved campaign-
level factors influence responses, such that observations within a campaign are not
independent of one another. In other words, there could be a correlation between
observations within a campaign, which then would violate the assumption that all
observations are independent. Ignoring the clustered structure of the data would lead to
erroneous conclusions (Snijders and Bosker, 2003), due to biases in the structural model
parameter estimates and their standard errors (Muthén, 1989; Muthén and Satorra, 1995).
Muthén (1994, 1997) suggests data should be analyzed in a multilevel setting if the intra-
cluster (in our case, within-campaign) correlations exhibit values greater than .10. In our
study, more than 50% of the intra-cluster correlations (see Table 3.2, below the diagonal)
indicate such values, which strongly suggests the need to use multilevel SEM.
Our theoretical background and hypotheses address effects at the individual level.
For example, consumers with better banner memory likely score better on the brand
memory measure. We do not have clear expectations about relationships at the campaign
level, but we specify one general latent construct at the between-campaign model level.
This approach is in line with (Hox, 2002) and (Muthén, 1989) when the theoretical
foundation for the model at the higher (between-campaign) level is lacking.
3.4.2 Categorical Variables Treatment
The database contains both dichotomous and categorical variables, which violates the
assumption of a multivariate normal distribution of the variables, so a maximum
likelihood estimator may produce biased parameter estimates and standard errors (Bollen,
1989). The development of continunous/categorical variables methodology (CVM)
(Muthen, 1984; Muthen & Asparouhov, 2002) and robust weighted least square
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Tab
le 3
.2. W
ithin
- and
bet
wee
n-ca
mpa
ign
corr
elat
ions
of b
rand
and
ban
ner
met
ric
indi
cato
rs
1
2 3
4 5
6 7
8 9
10
11
12
1. B
rand
reca
ll 1
0.68
**
0.04
0.
64**
0.
57**
-0
.26
-0.0
8 0.
12
0.28
0.
48**
-0
.09
0.26
2. B
rand
reco
gniti
on
0.46
**
1 -0
.29
0.60
**
0.62
**
-0.2
8 0.
07
0.23
0.
11
0.52
**
-0.2
2 0.
25
3. B
rand
favo
rabi
lity
0.14
**
0.15
**
1 0.
15
0.18
-0
.20
-0.1
1 0.
34
0.19
0.
22
0.30
0.
11
4. B
rand
con
side
ratio
n 0.
30**
0.
41**
0.
42**
1
0.71
**
0.21
0.
12
0.44
**
0.61
**
0.55
**
0.02
0.
62**
5. B
rand
inte
ntio
n 0.
21**
0.
27**
0.
43**
0.
65**
1
0.22
0.
17
0.35
0.
68**
0.
60**
0.
03
0.71
**
6. B
anne
r rec
all
0.18
**
0.21
**
0.10
**
-0.3
2**
-0.3
3**
1 0.
22
-0.2
5 -0
.24
-0.2
7 -0
.04
-0.3
9*
7. B
anne
r rec
ogni
tion
0.12
**
0.09
**
0.06
**
-0.1
7**
0.17
**
0.35
**
1 -0
.10
0.14
-0
.18
0.12
0.
17
8. B
anne
r lik
eabi
lity
0.03
**
0.10
**
0.24
**
0.15
**
0.25
**
0.14
**
0.09
**
1 0.
34
0.39
* 0.
28
0.58
**
9. B
anne
r rel
evan
ce
0.04
**
0.07
**
0.27
**
0.15
**
0.29
**
0.09
**
0.08
**
0.54
**
1 0.
37*
0.50
**
0.85
**
10. B
anne
r stri
king
ness
0.
02**
0.
06**
0.
21**
0.
25**
0.
42**
0.
11**
0.
06**
0.
45**
0.
40**
1
0.01
0.
44**
11. B
anne
r bel
ieva
bilit
y 0.
03**
0.
07**
0.
26**
0.
64**
0.
57**
0.
11**
0.
08**
0.
55**
0.
56**
0.
41**
1
0.44
**
12. B
anne
r cur
iosi
ty
0.04
**
0.10
**
0.30
**
0.60
**
0.62
**
0.16
**
0.10
**
0.62
**
0.64
**
0.46
**
0.59
**
1 N
otes
: Cor
rela
tions
bel
ow th
e di
agon
al a
re w
ithin
-leve
l cor
rela
tions
(i.e
., w
ithin
cam
paig
ns);
corr
elat
ions
abo
ve th
e di
agon
al a
re
betw
een-
leve
l cor
rela
tions
(i.e
., be
twee
n ca
mpa
igns
). *
p-va
lue
< 0.
05
** p
-val
ue <
0.0
1
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Chapter 3
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(WLS) estimation procedure have provided the correct test statistics for models
with any combination of dichotomous, ordinal, or continuous outcome
variables (Kline, 2010). We use the robust WLSMV estimator available in the
Mplus software (Muthén and Muthén, 2010) to estimate the multi-level SEM
model.
3.4.3 Missing Values Treatment The overall percentage of missing values for the indicators is 9.3 %, with a
maximum of 21.5 % for purchase intentions. In the covariates, 11.2 % of the
values are missing, with a maximum of 33.5 % for brand usage. We decided
not to delete observations with missing values, because doing so would lead to
10,872 deleted observations and increase the risk of biases, if the complete
observations did not adequately represent the overall sample (Schafer and
Olsen, 1998).
To overcome the missing value problem, we applied multiple imputation
(Rubin, 1996). Multiple imputation uses simulation to generate multiple
complete data sets, with missing values in the original data set replaced by
plausible values generated randomly from their predictive distribution. Then,
by conducting statistical procedures, we can provide “averaged” values for the
missing data. In the context of SEM studies, multiple imputation can be
performed using a restricted or unrestricted model (Asparouhov and Muthén,
2010). For multiple imputation using a restricted model, the data get imputed
using a factor structural model. For unrestricted model multiple imputation, in
contrast, the models are more general, to avoid misspecification bias. The
downside of an unrestricted model multiple imputation is the convergence
problem that arises due to the large number of parameters in the model. In two-
level data with many categorical variables, an analysis using multiple
imputation with an unrestricted model results in substantially better
performance than an analysis using unimputed data (Asparouhov and Muthén,
2010). Furthermore, the performance of multiple imputation is similar for
unrestricted or restricted models (Asparouhov and Muthén, 2010). Therefore,
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Ad and Brand Metrics for Banner Advertising Effectiveness
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we use unrestricted model multiple imputation in our analysis. Specifically, we
adopt variance-covariance model multiple imputation and include all indicators
and covariates in the data set in the model. We include all indicators for our
multiple imputation, to avoid the risk of bias in the subsequent analyses that
might result from the omission of variables that could have significant
relationships with imputed variables when performing the imputation (Schafer
and Olsen, 1998).
3.4.4 Covariates Modeling We included the covariates as predictors for each latent construct, rather than
as predictors for each indicator (Rabe-Hesketh, et al., 2007), with one
exception because, the brand purchase intention indicator had no underlying
latent construct.
3.5 Results 3.5.1 Measurement Model As we explained in the previous section, we tested our measurement model
with the factor indicator structure described in Table 3.1 for the within-level
model and one general factor for the between-level model. The estimation of
the measurement model showed good fit with the data. The �2-value of 122.9
(103 degrees of freedom, p = .089) indicated reasonable fit, considering that the
�2 statistic is sensitive to huge sample sizes. Other approximate fit indices
confirmed the fit of the model (root mean square error of approximation
[RSMEA] = .003, confirmatory fit index [CFI] = .999, square root mean
residual [SRMRwithin] = .042). All loadings in the measurement model were
statistically significant (p < .001). Table 3.3 contains the loading parameters,
standard errors, and t-values. The reasonable fit of the measurement model led
us to estimate and interpret the structural model.
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3.5.2 Structural Model
The structural model (Figure 3.2) showed good fit (�2 = 145.91, 125 df, p =
.0973, CFI = .999, RSMEA = .003, SRMRwithin = .052). As the standardized
parameter estimates for this model in Table 3.3 reveal, we found support for all
our hypotheses. In particular, banner attitude was associated positively with
banner memory (β = .245, p < .001), in support of H1. The path between
banner memory and brand memory was statistically significant (β = .517, p <
.001), indicating a positive relationship between banner and brand memory, in
line with H2. Brand attitude also showed a significant positive effect of banner
attitude (β = .321, p < .001), in support of H3. The parameter for the direct
effect of brand memory on brand attitude was positive (β = .293) and
statistically significant (p < .001), which revealed support for H4. We also
confirmed H5, because brand attitude related positively to purchase intentions
(β = 2.223, p < .001). Finally, the model accounted for a significant proportion
of within-level variation in each endogenous banner and brand construct. The
variance accounted (R-square) values were as follows: banner memory .092
(SE = .004), brand memory .537 (SE = .048), banner attitude .100 (SE = .007),
brand attitude .698 (SE = .021), and purchase intention .758 (SE = .078).
Regarding the covariate effects, almost all significant effects were as expected.
Experience with the brand related positively to most constructs, with the
notable exception of a negative (direct) effect on brand intention, which is
counterintuitive. However, considering that brand intention appears at the end
of the structural model, and experience was included as a covariate for other
constructs in the previous stages, the total effect may be positive, after we take
all indirect effects into account. The total effect of experience on brand
intention was positive (β’ = 1.92). Furthermore, as expected, age showed a
negative association with banner memory, but we did not find any significant
relationship with brand memory. For gender, the analysis revealed that female
consumers exhibited significantly better brand memory and more positive
banner attitudes than male consumers.
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Table 3.3 Within-level parameter estimates (standardized) for hypothesized and competing dual-mediation model Hypothesized Model Competing Model Parameter Value SE t-Statistic Value SE t-Statistic Measurement model
Brand memory � Brand recall
0.863 0.051 16.922 0.873 0.052 16.788
Brand memory � Brand recognition
1.467 0.173 8.480 1.484 0.185 8.022
Brand attitude � Brand favorability
0.890 0.036 24.722 0.889 0.037 24.027
Brand attitude � Brand consideration
1.046 0.050 20.920 1.045 0.051 20.490
Banner memory �Banner recall
1.425 0.080 17.813 1.491 0.088 16.943
Banner memory �Banner recognition
0.497 0.017 29.235 0.498 0.016 31.125
Banner attitude �Banner likeability
1.077 0.030 35.900 1.071 0.03 35.700
Banner attitude �Banner relevance
1.248 0.039 32.000 1.248 0.039 32.000
Banner attitude � Banner strikingness
0.682 0.020 34.100 0.683 0.02 34.150
Banner attitude � Banner believability
1.083 0.029 37.345 1.084 0.029 37.379
Banner attitude �Banner curiosity
1.626 0.050 32.520 1.63 0.05 32.600
Structural Model
Banner memory �Brand memory
0.517 0.039 13.256 n.a n.a n.a
Banner attitude � Brand memory
n.a n.a n.a 0.141 0.017 8.294
Banner memory � Banner attitude
0.245 0.015 16.333 0.236 0.015 15.733
Brand memory � Brand attitude
0.293 0.029 10.103 0.281 0.03 9.367
Banner attitude � Brand attitude
0.321 0.039 8.231 0.317 0.04 7.925
Brand attitude �Purchase intention
2.223 0.561 3.963 2.235 0.575 3.887
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BannerMemoryBanner
Memory
BrandMemoryBrand
Memory
BannerAttitudeBanner Attitude
BrandAttitudeBrand
AttitudePurchaseIntentionPurchase Intention
0.245(0.015)
0.293(0.029)
0.517(0.039)
0.321(0.039
)
2.223(0.561)
Notes: Values are standardized parameter estimates, and values in parentheses are their standard errors.
Figure 3.2. Structural model results, hypothesized model
3.5.3 Competing Model: Dual Mediation Although our model received statistical support from the data, we cannot
conclude the data exclusively confirm the proposed model. Therefore, we
considered the dual mediation model (MacKenzie et al, 1986), which has
gained considerable empirical support in traditional media contexts (Brown and
Stayman, 1992), as an alternative model. In the dual mediation model, the
effect of advertising attitude on brand attitude is mediated by brand cognition.
Although we measure brand memory, instead of the more general brand
cognition concept to which the dual mediation model refers, it is interesting to
determine whether including a mediating role for brand memory can improve
model performance. Furthermore, unlike our model, the dual mediation model
lacks a direct path between advertising cognition and brand cognition. To
estimate a dual mediation model, we add a path from banner attitude to brand
memory and delete the path between banner and brand memory (Figure 3.3).
The competing model offered comparable model fit indices (�2(125) =
148.80, p = .072, CFI = 0.999, RSMEA = .003, SRMR = .062). Although all
these indices indicated reasonable model fit, the chi-square value and SRMR
index in this competing model were slightly worse than those in the
hypothesized model (Figure 3.1). A comparison of the individual parameter
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BannerMemoryBanner
Memory
BrandMemoryBrand
Memory
BannerAttitudeBanner Attitude
BrandAttitudeBrand
AttitudePurchaseIntentionPurchase Intention
0.236(0.015)
0.281(0.030)
0.141(0.017) 0.317
(0.040)
2.235(0.575
)
Notes: Values are standardized parameter estimates, and values in parentheses are their standard errors. Figure 3.3. Structural model results, dual mediation model
estimates in Table 3.3 showed that most of the parameters were similar to those
of the original model and statistically significant, which provided support for
all the hypothesized relationships between banner and brand metrics. A notable
difference arose in how the two models explained brand memory though. In
our model, brand memory was directly affected by banner memory, whereas in
the competing dual mediation model, it was affected only indirectly by banner
memory, through banner attitude. As hypothesized in our model, the
relationship between banner memory and brand memory was positive and
significant (β = .517). In the dual mediation model, the relationship between
banner attitude and brand memory also was positive and significant, but it had
a much lower β of .141. Furthermore, in our hypothesized model, the R-square
for brand memory was .537, whereas in the dual mediation model it was only
.310. On the basis of these values, we concluded that the competing model
offered slightly worse fit than our hypothesized model, so we use our model
presented in Figures 3.1 and 3.2 as the basis for our concluding discussion.
3.6 Conclusion 3.6.1 Discussion This study has determined the interrelationships among advertising and brand
metrics in banner advertising. In general, we find that the effects of banner
advertising on advertising and brand metrics are similar to those in traditional
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advertising contexts. Our model supports the notion that banner advertising has
an ultimately positive effect on purchase intentions, through intermediate
effects on brand memory and brand attitude. All the hypotheses within our
structural model, representing the series of intermediate effects from banner
memory to purchase intention (through banner attitude, brand memory, and
brand attitude), received support from our data.
Not all effects were equivalent to the effects established in traditional
advertising studies though. We found a stronger positive relationship between
banner memory and brand memory than between banner attitude and brand
memory, which highlights an important difference between our model and the
dual mediation model. In the latter, a widely used model to assess advertising
in traditional media, there is no direct influence of advertising cognition on
brand cognition. We consider several explanations for this difference. First, it
may be caused by the differential nature of banner advertising, compared with
television or print advertising. In the dual mediation model, the relationship
between advertising attitude and brand cognition builds on the premise that
advertising affect may facilitate the acceptance of brand claims (MacKenzie et
al., 1986). Because most banners are very simple, the effect of banner attitude
on brand memory, through banner affect, might not exist. Second, even if some
banners eventually generate affection, which enhances brand memory, this
effect might be low compared with the enhancement of brand memory
generated by the stronger links between banner and brand memory in a
consumer associative network that has been influenced by banner exposures.
Third, we use banner and brand memory constructs, instead of the advertising
and brand cognitions that appear in the dual mediation model for traditional
media. Although memory is part of the cognitive system, advertising/brand
memory is not the same as advertising/brand cognition. More complex
processes might define the relationships between advertising and brand
cognition, as well as between advertising/brand cognition and
advertising/brand attitudes.
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Another important difference between our model and the dual mediation
model entails the size of the effect of advertising attitude on brand attitude,
compared with that of brand cognition/memory. In the dual mediation model
(Brown and Stayman, 1992), the effect of advertising attitude on brand attitude
is more than twice as great as the effect of brand cognition on brand attitude
(standardized estimates: .57 versus .20). MacKenzie et al. (1986) even
considered the effect of brand cognition on brand attitude so low that it was
insignificant. In our model, both the effects of banner attitude on brand attitude
and of brand memory on brand attitude were significant and similar in size,
though the former were slightly larger (standardized estimates: .32 versus .29).
This finding highlights the lessened effect of advertising attitude in banner
advertising, compared with that in traditional advertising (standardized
estimates: .57 versus .32). The effect of brand memory on brand attitude even
appeared stronger (standardized estimates: .20 versus .29) in banner
advertising. There are two possible explanations. First, consumers might
process banners using minimum resources (Chatterjee, 2008; Yoo, 2008), such
that the banner attitude that results from banner advertising messages and
features has a weaker effect on brand attitude than would be the case in
traditional media advertising. Yet, a dominant brand logo and other pictorials
in banners may make the brand more salient in consumer memory, which
would then be perceived as more familiar to the consumer. This familiarity
would be translated subsequently into an emotional response that serves as a
positive cue for attitude toward the brand (Nordhielm, 2002). Second, the
stronger effect of brand memory on brand attitude may be due to the
confounding effect of brand familiarity, built over time. Unfortunately, we
cannot disentangle this effect, because our data set did not include new or
unfamiliar brands.
Regarding the measurement model, the relationships between
advertising/brand metric constructs (i.e., banner memory, brand memory,
banner attitude, and brand attitude) and their indicators in traditional media
apply similarly to banner advertising. This finding may serve as an
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endorsement of the adoption of advertising and brand metrics from traditional
media advertising research into banner advertising research. Regarding the
structural model, we find that basically (cf. the differences we discussed
previously), the relationships between advertising and brand metrics in
traditional media advertising appear in banner advertising. This finding aligns
with the suggestion that advertising on the Internet communicates in a way
similar to advertising in traditional media (Percy and Elliott, 2005), such that
“with advertising and the Internet we are essentially dealing with a print
advert” (Percy and Elliott, 2005, p. 11). However, this similarity might
disappear when we address other kinds of Internet advertising, such as search
engine advertising, pop-ups, or games, because of their lesser similarity with
traditional media advertising.
Finally, with regard to the covariate effects, the finding that banner
memory correlates negatively with consumers’ age offers face validation for
the results. The insignificant link between brand memory and age instead might
arise because in our study, most of the brands were prominent and easy to
remember for both younger and older consumers. Female consumers expressed
significantly better brand memory and more positive banner attitudes than their
male counterparts, probably because more brands in our data set targeted
female consumers.
3.6.2 Managerial Implications This study has several implications for advertisers and marketing managers. In
line with the idea that the Internet is both an information and a transaction
medium, we confirm that, above and beyond the direct click-through and sales
effects of banners, banner exposures affect brand metrics and thus have
positive, indirect effects on purchase intentions. The indirect effect is similar to
the one established for traditional media advertising. This finding justifies
developments in online advertising practice that has started to use traditional
advertising and brand metrics, such as advertising and brand recall,
recognition, or attitude. It also constitutes an important observation, in that
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banners have lost much of the novelty that stimulated direct responses to them
in the 1990s and early 2000s.
If we view our model as one variation of the hierarchy-of-effect model,
our findings can translate into strategies to improve brand performance. In
banner advertising, brand attitude can be enhanced through (1) the transfer of
affection for the banner to the brand and/or (2) heightened awareness of or
familiarity with the brand, which leads to a misattribution of positive attitude to
the brand. The indirect effect of advertising memory on brand attitude, through
brand memory, also is stronger than the one through advertising attitude.
Therefore, banners need to facilitate stronger links to the brand, rather than
attempt to provoke stronger affect. In practice, advertisers might benefit from a
brand logo or slogan as the main element of their banner advertisements.
However, intrusive and annoying banners, such as pop-ups, may increase
awareness but also exert negative impacts on banner attitudes. This negative
impact will decrease positive attitudes toward the brand as well.
3.6.3 Limitations and Further Research Similar to other empirical studies, our project has limitations, which suggest
directions for further research. First, our data set contains only established
brands. Previous research (Campbell and Keller, 2003; Dahlén, 2001;
Draganska et al., 2014) show that brand familiarity influences the effectiveness
of advertising exposures. We did not include less familiar brands in our study,
so we cannot speak to the effect of banners on unfamiliar or new brands. This
question remains for further research.
Second, the banners in our data set were similar, in that they were all
static. However, they may have differed in size or location on the webpage; this
information was not recorded in the database. Therefore, we cannot include
banner characteristics as explanatory variables, even though the interactivity of
the banner (e.g., animation, gamification, video), its size, and its location on the
page likely influence the relationships between advertising and brand metrics
in banner advertising. For example, animation in a banner can increase both
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awareness and irritation (Chatterjee, 2008), so the relation between memory
constructs and an attitude construct could be negative for animated banners.
Furthermore, brands advertised in complex banners are harder to recognize
(Lee and Ahn, 2012). Future research should feature other types of banner
advertising, such as animated, video, or pop-up banners. It also would be
interesting to study the relationships among advertising and brand metrics for
other types of Internet advertising, such as interstitial, take-over, and paid
search advertising, to determine if the similarities we find between traditional
and banner advertising extend to these realms.
Third, our model excluded any effects of advertising in other media.
Integrated marketing communication theory recommends careful planning of
promotional activities, because one promotional activity likely interacts with
other, related activities. The objective is to achieve synergy among these
promotional activities. In an advertising context, the effect of advertising in one
medium may enhance the effect of advertising in other media (Naik and
Raman, 2003). For example, Zenetti, Bijmolt, Leeflang, and Klapper (2014)
find substantial interaction effects of different online and television advertising.
We lack data on advertising in other media for the brands in our study though,
so we could not control for such effects. Rather, we assume that the intensity of
advertising in other media is comparable across campaigns. A natural extension
of our study would be to investigate how banner advertising synergizes with
other media. Such insights should help advertisers develop more effective
media mixes.
Fourth, we used SEM and cross-sectional data to examine relationships
between advertising and brand constructs in a causal manner. In this condition,
no single statistical analysis, regardless of how sophisticated it is, can confirm
or disconfirm causality (Bullock et al., 1994). Our findings therefore should be
interpreted as a possible means to model the interdependent relationships
among banner and brand metrics. Single directionality in our model
relationships implies causal relationships only in a steady-state condition
(Percy and Elliott, 2005). However, our finding is in line with the interpretation
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of an advertising hierarchy-of-effects (Barry and Howard, 1990) and the
general aim of advertising to build the brand over the long term (Percy and
Elliott, 2005).
Internet advertising has become increasingly important for virtually
every business in the past decade, and our study contributes to a better
understanding of the multifaceted impact of banner advertising. We encourage
other researchers to use these insights to further enhance the effectiveness of
banner advertising.
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Chapter 4 Evaluating Website Polls as an Instrument for Customer Surveys 4.1. Introduction Imagine this situation faced by the marketing manager of a small national
restaurant chain: the company has received information that within a month, a
main competitor will launch a new dessert menu, promoted by a massive
advertising campaign. The chain may well lose customers to the competitor.
Unfortunately, the manager has no data about customer preferences for
desserts, and there is no time or budget to conduct a nationwide customer
survey. However, the company does have a website that attracts more than ten
thousand visitors a day. The desperate marketing manager wonders: “What if
we post some simple questions: ‘What is your most favorite dessert?’ ‘How
often do you have dessert at lunch?’ Do you like rice pudding?’ If we put the
questions on our website, and invite our customers to respond, can we use their
answers to guide our decisions?” In other words, can companies treat online
responses to quick online polls as if they come from reliable, well-designed
surveys?
This study explores the usefulness of website polls as quick customer
survey instruments to provide market information to companies. In the study, a
website poll is defined as a form of survey with a limited number of closed
questions—often just a single question—posted on a website, with all site
visitors invited to submit their responses or votes. We focus on website polls
posted on company websites and directed to customers. Such polls are usually
placed in a prominent area of the site (e.g., the home page). Respondents can
access a summary of all current responses, often in the form of bar graphs or
pie charts. (See Figure 4.1 for an example of a website poll, related to the
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newly-designed Honda CR-Z, as posted on the Honda website.) Website polls
add a playful element to websites and increase their perceived interactivity
(Song and Zinkhan, 2008). Visitors may also be interested in the opinions of
fellow site visitors, thus increasing the perceived value of site visits. As
customer survey instruments, website polls may represent fast, cheap, and
easy-to-use methods of collecting information from (prospective) customers.
However, because website poll samples are by nature non-probabilistic and
self-selected, their representativeness is questionable. Participation in the polls
is limited to Internet users; therefore, respondent samples may not represent the
general population. For reviews of the limitation of Internet surveys, see
Couper (2000), Evans and Mathur (2005), Eysenbach (2005), and Fricker and
Schonlau (2002).
Despite these drawbacks, there are several reasons that website polls
may have potential as customer survey instruments. First, as is often the case in
social surveys, the target population of a customer survey may be a specific
group of (potential) customers rather than the general population. The selection
mechanism of website polls could be an advantage, because participants are
likely to be the company’s (potential) customers. However, as in other survey
forms, there may be selection bias caused by the decision to participate or not
in a website poll. Second, website polls gather a large number of participants in
a short time period at low cost (McDonald and Adam, 2003), making them one
of the most popular forms of web surveys (Couper, 2000). For example, the
Honda poll depicted in Figure 4.1 attracted more than ten thousand
participants, without any need to contact individual respondents or offer
incentives for participation. Third, Internet technologies control access to
website polls, preventing multiple submissions or the inclusion of irrelevant
subjects (Eysenbach, 2005). Fourth, with regard to missing data, the quality of
web surveys equals that of conventional surveys (such as mail surveys) and—
in the case of open-ended questions—exceeds them (Barrios et al., 2011). As a
result of these advantages, early research has shown the potential of website
polls to produce realistic estimates (Yoshimura ,2004).
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Previous studies of web surveys have used the general population as
their research context (e.g., Curtice and Sparrow, 2010; Fricker et al., 2005;
Roster et al,. 2004; Schillewaert and Meulemeester, 2005; Strabac and Aalberg,
2011). Bethlehem (2009), for example, compared self-selection-based online
surveys and probability-based conventional surveys in predicting the
composition of the Dutch parliament and concluded that probability-based
surveys perform better when the target population is the general population.
Our study focuses on situations in which the target population differs from the
general population; it evaluates website polls as customer survey instruments
for companies. To our knowledge, we are the first to study website polls in the
context of a company’s customer base or market segment. We contribute to
existing literature by studying (i) sample characteristics of website polls
compared to telephone surveys and their representativeness with regard to
company customer databases, (ii) response differences between both survey
modes and the sources of these differences, and (iii) ways to correct the biases
observed. Knowledge of these issues will help companies make more informed
decisions about whether and how to use website polls for customer surveys.
Figure 4.1. Examples of website poll questions
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In the next section, we provide background information on Internet surveys,
particularly website polls, and a detailed description of our research questions.
We follow with a description of the research design and survey methodology.
Next, we present our empirical findings. We conclude with a discussion of the
results and suggestions for future research directions to further explore the
usefulness of website polls as customer survey instruments.
4.2. Background and Research Question Since Internet surveys were introduced about twenty years ago, they have
evolved into multiple forms, ranging from email surveys to interactive web
surveys. Couper (2000) provides a thorough discussion of web surveys and
suggests a classification based on their sampling methods. Web surveys can be
categorized into non-probability and probability-based methods. Website polls
belong to the non-probability category. They have limited coverage, are self-
selected, and often have little or no control over who responds to the polls.
Therefore, website poll samples are often not representative of the general
population. So far, website polls are popular, but are generally used for
entertainment purposes and not as surveys in the scientific sense (Couper,
2000).
In contrast, probability-based web surveys aim to achieve
representativeness by improving the sampling process using probability-based
sampling methods. The most popular survey types in this category use pre-
recruited panels. Panel members are recruited using probability-sampling
methods such as random digit dialing (RDD), to be representative of the
general population. However, empirical studies involving the general
population (e.g., Fricker et al., 2005; Loosveld and Sonck, 2008; Lugtig et al.,
2011; Strabac and Aalberg, 2011, Vicente and Reis, 2012) find significant
sample differences between pre-recruited panel web surveys and traditional
surveys.
Although support for the effectiveness of web surveys in representing
the general population is still lacking, it is interesting to review this issue when
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the population of interest differs from the general population. For example, in a
survey of Internet banking, the population of interest is not the general
population but users of Internet banking facilities. The demographics of
banking users may differ from those of the general population; they may be
younger, more educated, and more technology-oriented. Hence, in this setting,
it is likely that web surveys can achieve equal or better sample
representativeness compared with traditional survey methods. We can expect
that web site polling samples are representative of the target population (i.e.,
the company’s customers) because the poll is posted on the company website.
Visitors to a particular company website are likely to be similar to, or even
belong to, the target segment of the company and the population of interest for
the survey.
A notable development is that response rates for telephone surveys are
declining. Curtin, Presser, and Singer (2005) show the telephone survey
response rate in the United States declined at an average rate of 1.5% per year
in the period 1997–2003. A similar situation is found in Europe (Blyth, 2008).
Many young people have never had a fixed telephone line; their mobile phones
are their only telephone connections. Since mobile phone numbers are
generally not listed, this growing segment will not be reached by RDD surveys.
Given these developments, it is not clear whether traditional probability-
sampling procedures such as those used for telephone surveys are superior to
self-selected web surveys with targeted respondents, such as website polls.
Accordingly, we test the following hypotheses:
H1a: The demographics of website poll respondents are comparable to the
demographics of telephone survey respondents.
H1b: The demographics of website poll respondents are comparable to the
demographics of the company’s customers.
H1c: The demographics of telephone interview respondents are comparable to
the demographics of the company’s customers.
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Another important issue related to web surveys is the mode effect. Mode
effects occur when respondents report different responses under different
survey modes (Voogt and Saris, 2005), (in our case, when answering a website
poll or a telephone interview). A number of studies have reported the existence
of mode effects (e.g., De Leeuw, 2005), especially when surveys contain
sensitive questions (Tourangeau and Smith, 1996). Several factors vary with
survey modes and may be the source of response differences. These include
media-related factors, information transmission differences, and interviewer
effects (De Leeuw, 1992). Although recent studies show web surveys can
deliver responses with similar quality as conventional surveys (Barrios et al.,
2011; Holland and Christian, 2009), a number of empirical studies show
responses to web surveys are different from responses to traditional surveys
(Deutskens et al., 2004). Smith (2001) compared face-to-face and web surveys
based on probability sampling using a panel constituted by RDD and found
systematic differences (especially regarding ‘do not know’ responses).
Subsequently, Grandcolas, Rettie, and Marusenko (2003) found response
distributions differ between web and paper-based questionnaires. In a
comparison between a telephone survey and a web survey with panel
respondents, Roster et al. (2004) concluded that the web survey garnered a
lower response rate, more item omissions, and more negative or neutral
evaluations than the telephone survey. In another study, Fricker et al. (2005)
found web respondents tended to give less differentiated responses and less
item non-response. Furthermore, Chang and Krosnick (2009) found web
surveys produced less socially desirable response bias than telephone surveys.
Because other kinds of web surveys tend to show mode effects, it is
interesting to study whether the responses to website polls differ from the
responses to telephone interviews. In practice, response differences can be
caused by both the mode of interviewing and differences in the samples.
Therefore, we formulate three hypotheses regarding these effects. The first
hypothesis includes a simple comparison of the answers in both surveys, the
second hypothesis incorporates possible differences in respondent
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demographics that may influence responses, and the third hypothesis explores
the possible effects of the interviewing mode.
H2a: Responses to website polls and telephone interviews are different.
H2b: Differences in responses are related to the mode of interviewing, while
controlling for demographics.
H2c: Responses are related to demographics, while controlling for mode
effects.
When mode effects are absent, response differences among survey
modes may solely reflect non-coverage bias due to limited coverage of a single
mode of survey. There are several methods to cope with this problem. One
weighting method for reducing the bias of web surveys is propensity score
weighting (PSW). In experiments involving non-randomized subject
assignments, a direct comparison between treatments may be misleading
because there may be systematic differences (i.e., covariates) between subjects
exposed to each treatment. The propensity score—the conditional probability
of assignment to a particular treatment given a vector of observed covariates
(Rosenbaum and Rubin 1983) —can be used as an adjustment to remove bias
due to these systematic differences. In particular, PSW can be applied to reduce
biases caused by the inclination of certain groups of the population to
participate in web surveys. However, Loosveldt and Sonck (2008) show that
applying PSW does not always solve the problem, and the bias sometimes
becomes even greater. Yoshimura (2004) concludes PSW works only if the
covariates of the variables are observed and identified.
Another popular method of reducing bias is demographic weighting.
Taylor (2000) applied demographic weighting to several web survey data sets
and concluded it could solve the problem of non-coverage bias. However, not
all researchers have been successful in applying weighting methods for web
survey studies. For example, Vehovar, Manfreda, and Batagelj (1999) found
that weighting could not solve the non-coverage bias in their web surveys.
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They also found weighting could be problematic because responses can be
highly diverse, making it an inappropriate solution to the problem of non-
response bias.
Based on these extant empirical studies, we conclude it is not clear
whether some form of weighting can solve the problem of response biases
caused by non-coverage and non-response effects for a web survey. Previous
studies suggest that whether weighting works is contingent on several factors.
In this study we explore whether demographic weighting can be applied to
reduce response biases for website polls. This rather simple method may be
effective because website polls usually pose only simple questions and
demographic characteristics may be sufficient to explain and correct
differences in the actual responses. We formulate our last hypothesis as
follows:
H3: After applying demographic weighting, the responses to the website polls
and the telephone interviews are comparable.
4.3. Study Design We administered a telephone interview survey and a series of website polls in
collaboration with a Dutch insurance company. The questions in the poll were
classified into two groups: demographics and opinions. The demographics
include gender, age, and education (see Table 4.1). For the opinions, using
five-point scales, the respondents answered questions on the following four
issues:
1. The importance of comparing offers from various health insurance
companies (1 = very important and 5 = very unimportant).
2. The monthly premium difference that would make the respondent switch to
another insurance company (0-5 euros, 6-10 euros, 11-15 euros, more than
15 euros, do not switch based on premium difference).
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3. Whether an insurance company should request a higher premium from
persons with serious diseases (1 = strongly agree and 5 = strongly disagree).
4. Whether an insurance company is allowed to reject someone who has
committed an insurance claim fraud (1 = strongly agree and 5 = strongly
disagree).
The formulation of the questions was the same for the telephone survey and the
website poll.
Respondents for the telephone interview survey were chosen randomly
from the list of customers in the company database. In total, 250 respondents
answered three demographic questions and four opinion questions during
telephone interviews. In the website polls, data were gathered from
questionnaires posted on the company website. In contrast to the telephone
survey, website poll respondents answered only four questions: three
demographic questions and one opinion question. Each week, we posted a
website poll with a different opinion question on the company’s website. In
total, we obtained 1,018 responses from website polls, consisting of 265, 250,
253, and 250 responses for opinion questions 1–4, respectively.
Table 4.1 Sample and customer characteristics Sample Target Population
Website Poll (n = 1,018)
Telephone Interview (n = 250)
Company Database
(N =+/- 80,000) Gender female 50.2% 50.0% 48.1%
male 49.8% 50.0% 51.9%
Age 18-25 years 41.3% 8.4% 21.6%
26-35 years 25.8% 18.4% 24.3%
36-45 years 17.1% 16.8% 18.5%
46-55 years 8.4% 22.4% 16.5% > 55 years 7.4% 34.0% 19.1%
Education Level
Primary school 1.5% 4.4% 9.0% Low secondary 13.0% 31.2% 24.0% High secondary 25.6% 23.2% 41.0%
Bachelor 39.9% 29.2% 16.0% Master-Doctoral 20.0% 12.0%
10.0%
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4.4 Results 4.4.1 Sample Characteristics We first compared the characteristics of both the interview and poll samples
with customers in the company database. The data are summarized in Table
4.1. In terms of gender, samples from both survey modes show an even
proportion of male and female respondents, which closely reflects the
customers’ gender distribution in the database. However, with regard to age
and education, distributions in both samples are different from the distributions
in the company database. Website poll respondents tend to be younger, with
about 40% younger than 26 years. They also tend to be more highly educated,
with 60% having a university degree (bachelor’s or master’s). In contrast,
telephone respondents tend to be older and less educated, with 56% older than
45 years and only 40% with a university degree. The distributions of age and
education of the company’s customers are in between the distributions of the
interview and poll samples.
We conducted Chi-square tests to examine whether the differences for
gender, age, and education were statistically significant. For gender, none of
the tests are significant (all p-values are larger than 0.05), whereas all three
comparisons—website versus customer database, telephone versus customer
database, and website versus telephone –—show highly significant differences
for age and education (all p-values are less than 0.001). Based on these results,
except for gender, we reject hypotheses H1a, H1b, and H1c for each
demographic.
Our first three hypotheses address the representativeness of both
samples. With two out of three demographics showing significant differences,
we conclude neither of the two samples, website poll or telephone interview, is
representative of the target population. Also, both samples differ in terms of
respondent demographics (for two of the three demographics).
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4.4.2 Response Distribution Our next analyses addresses answers to the four opinion questions. Table 4.2
summarizes the responses in terms of means and standard deviations (see rows
labeled ‘unweighted’). We conducted a series of t-tests to examine the
differences in the means for both survey modes and found only the response
mean for Question 1 was significantly different (p = .004). Next, we examined
the distribution of the responses. We applied Chi-square tests to test for
differences in the proportion of responses in each category of answers between
the website polls and the telephone interviews. We found significant
differences for three of the four questions: Question 1 (p < .001), Question 2 (p
<. 001), and Question 4 (p =. 013). The difference was insignificant only for
Question 3 ( = .291). Therefore, although the means are only marginally
different, the responses are spread differently across the categories of answers.
Based on these two series of tests we accept H2a and conclude the responses to
the website polls and the telephone interviews are different.
4.4.3 Sample versus Mode Effects Hypotheses H2b and H2c focus on the source of response differences: are they
related to the sample characteristics, the modes of survey, or both? We employ
an analysis of variance (ANOVA) with four factors: mode (two levels), gender
(two levels), age (five levels), and education (five levels). The model also
includes interaction effects between the survey mode and each demographic
variable (i.e., mode x gender, mode x age, and mode x education). Table 4.3
displays a summary of the ANOVA results. Of the four questions, none shows
a significant main effect of the survey mode (all p > .05), leading to the
rejection of H2b. The only significant effect involving survey mode is related
to the interaction effect of mode and gender for Question 1. However, this
effect is small, reflected by a squared partial eta of only 0.9%. There are
significant main effects for all demographic variables, although each concerns
only one question. Education has a significant main effect for Question 2 (p =
.007), age for Question 3 (p = .023), and gender for Question 4 (p = .001).
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Table 4.2. Unweighted and weighted response mean estimates (on a 1-5 scale) Question 1 Question 2 Question 3 Question 4 Mean S.E Mean S.E Mean S.E Mean S.E
Website Poll
Unweighted 2.48 .062 3.37 .082 4.10 .048 2.22 .062 Weighted by age 2.41 .066 3.44 .144 4.17 .032 2.13 .037 Weighted by education 2.35 .079 3.49 .117 4.14 .185 2.12 .082
Telephone Interview
Unweighted 2.22 .065 3.39 .087 4.02 .056 2.26 .053 Weighted by age 2.22 .071 3.27 .136 3.95 .057 2.22 .040 Weighted by education 2.28 .077 3.47 .139 4.00 .059 2.35 .052
Therefore, we accept H2c and conclude that the responses are significantly
related to the sample characteristics.
By further examining the data, we found the response differences related
to the demographics have high face validity. Higher-educated respondents
regarded comparing offers from different insurers (Question 1) as more
important than lower-educated respondents, older respondents tended to
disagree on imposing higher premiums for persons with more serious diseases,
and females were more lenient on people with a fraud record. Again, we could
not find any particular response patterns related to the survey mode. With
regard to our second set of hypotheses we conclude the differences in
responses between both survey modes are minor and are more related to
differences in sample demographics than to the survey mode.
4.4.4 Weighting Results The final research question proposes demographic weighting as a potential
solution to correct biases caused by non-coverage. Because the ANOVA results
show significant effects of sample characteristics on responses and because we
also found differences in sample characteristics between both survey modes,
we cannot use website polls just only to replace the telephone interview.
Although t-tests detected marginal differences only between the response
means of both survey modes, the responses were distributed differently. Thus,
weighting to adjust for biases related to differences in sample characteristics
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Table 4.3. ANOVA summary
p-values Source of Variation Question 1 Question 2 Question 3 Question 4 Survey Mode 0.538 0.957 0.143 0.067 Gender 0.351 0.785 0.972 0.001 Age 0.126 0.489 0.023 0.533 Education 0.146 0.007 0.720 0.728 Mode * Gender 0.034 0.888 0.951 0.199 Mode * Age 0.371 0.267 0.233 0.133 Mode * Education 0.212 0.424 0.238 0.317
could make the results of each survey mode more similar. Demographic
weighting could lower the bias problems because we found no significant mode
effect in the ANOVA results.
We have estimated the population response means using simple
demographic weightings based on age and education. We did not use gender
for the weighting because there are no significant differences in gender
distribution between both samples and the customer data in the company
database. The result summary is shown in Table 4.2 (see results weighted by
age and by education)
When we compare results across the questions and the weighting
variables, there is no clear pattern. For Question 1, the weightings reduce the
mean differences between both modes from .26 to .07 (see Table 4.4) without
much inflation of the standard errors. In contrast, weighting widens the
differences for Question 4 from .04 to .23. In the case of Question 2, weighted
by education, the mean differences are the same before and after weighting. In
general, weighting also tends to result in larger standard errors, although in
most cases the inflations are not substantial. However, we expected the means
estimated from weighted responses of both modes to be similar because we
found no significant mode effects in the ANOVA. We conducted a series of t-
tests to test the hypothesis that the difference between the mean estimated
using weighted telephone responses and the mean estimated using weighted
website polls responses is equal to zero (i.e., H0: �weighted telephone - �weighted website
polls = 0). The p-values of these tests are displayed in Table 4.4 (in parentheses).
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Because none of the eight p-values is less than 0.1, we can accept H3 and
confidently conclude there is no statistical difference between mean estimates
derived from weighted responses of the website polls and the telephone
interviews.
4.5 Discussion 4.5.1 Conclusion The ubiquity of the Internet has made it an attractive alternative technology for
conducting surveys (Tingling, Parent, and Wade, 2003). With an ever-
increasing number of Internet users (more than 3 billion in 2014) (Internet
World Stat, 2015), the Internet has become a powerful tool for collecting
information on individuals. Most of the world’s largest research firms provide
web surveys as part of their services (Evans and Mathur, 2005). Although
several methodologies for web surveys, each with their own strengths and
weaknesses, have been proposed (Couper, 2000; Evans and Mathur, 2003;
Eysenbach, 2005; Fricker and Schonlau, 2002), the web survey arena is still
developing (see, for example, Heinze et al., 2013; Jin, 2011; Van Selm and
Jankowski 2006; Williams, 2012). This study focuses on a less-studied variant
of web surveys, the website poll, which invites website visitors to submit quick
online responses to simple questions.
By conducting a series of website polls and a telephone interview
survey, we have explored the usefulness of website polls as customer survey
Table 4.4. Difference between website polls and telephone interview mean estimates (p-values from corresponding t-tests are in parentheses)
Mean estimates difference (D)
Data Question 1 Question 2 Question 3 Question 4
Unweighted -0.26 (0.004) 0.02 (0.867) -0.08 (0.259) 0.04 (0.589)
Weighted by age -0.19 (0.194) -0.17 (0.465) -0.22 (0.301) 0.09 (0.486)
Weighted by education -0.07 (0.468) -0.02 (0.740) -0.14 (0.562) 0.23 (0.381)
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instruments. The results lead to three main conclusions. First, we find
differences in respondent characteristics between each of the survey modes and
the company’s customer database. Second, response differences between both
surveys are mainly attributable to sample effects, rather than mode effects.
Third, we find demographic weighting can be used to reduce the bias resulting
from sample effects, (in our study case, self-selection effects). Therefore, our
overall conclusion is that polls on a company website can be a fast, cheap, and
easy-to-use method of collecting information from (prospective) customers,
and they merit further customer research.
With regard to our first set of hypotheses, our analyses show sample
characteristics of the website polls and the telephone interview survey are
different from those of the target population (the company’s customer
database). In line with previous studies (e.g., Roster et al., 2004; Schillewaert
and Meulemeester, 2005), we find our website poll respondents are younger
and have higher education levels than both telephone survey sample and the
customer database. A possible explanation for this finding is that Internet users
are not spread homogeneously over the target population; there are still
demographic groups with a low Internet penetration. Furthermore, with regard
to age and education, telephone interview respondents’ characteristics are not
similar to those of the company’s customers, although our samples were
randomly drawn from the customer database. This finding suggests we should
be more aware of non-response problems in telephone interviews, as indicated
by Curtin et al. (2005), Tourangeau (2004), and Voogt and Saris (2005). As
younger people are less likely to have fixed telephone lines, they tend to be
under-represented in traditional telephone samples (Strabac and Aalberg 2011).
For the website polls we find the opposite effect: younger and more educated
individuals are over-represented in the sample.
Our study also shows differences in response distributions between the
website polls and the telephone interviews, which confirms previous findings
by Roster et al. (2004) and Schillewaert and Meeulemester (2005). In this case,
there could be confounding effects of sample characteristics due to self-
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selection and effects of the modes of survey. Based on ANOVA results, we
conclude response differences are much more affected by sample
characteristics than by mode effects. This finding is in line with the suggestion
of Vehovar et al. (2001) that the differences between web survey and other
survey modes becomes negligible in some research settings. The lack of mode
effects in our study is a propitious finding. Aside from the issue of non-
response bias, the absence of mode effects means the biases in website polls
and in telephone interviews are attributable to non-coverage due to limitations
of both survey modes in reaching the target population. Consequently,
demographic weighting can correct the bias caused by non-coverage in both the
website polls and the telephone interviews.
Given that some population groups are harder to reach using website
polls and that responses are affected by sample characteristics, weighting
becomes necessary to derive valid inferences from the website polls data. We
applied a simple weighting procedure based on demographic variables to show
the estimates based on weighted website polls data and weighted telephone
interview data are not statistically different. This finding is in line with Witte,
Amoroso, and Howard (2000), who argue that voluntary Internet-based survey
research can yield meaningfully comparable data about both Internet users and
larger populations. We also find estimates based on weighted data tend to have
larger standard error of estimates, which is not unexpected (see for example,
Vehovar et al., 2001). However, the inflation of the standard errors (32% on
average in our study) is modest.
There is a final issue of non-response bias. As mentioned, website polls,
as examples of open web surveys, are criticized for having samples based on
convenience sampling It is widely documented that web surveys result in lower
response rates (for a thorough meta-analysis on response rates comparison see
Manfreda et al., 2008 and Shih and Fan, 2008). However, non-response does
not necessarily lead to non-response errors, since non-response errors occur
only if the non-respondents would have provided different responses compared
to those who did respond (Manfreda et al., 2008; Voogt and Saris, 2005).
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Groves (2006) presents empirical findings with regard to this statement.
Because this convenience sampling problem seems unresolved, other authors
argue that oversampling could add more credibility to a non-random web
survey, although oversampling cannot automatically solve the problems related
to convenience sampling (Couper, 2000). Due to their low administration cost
and speed of data gathering, website polls can provide sufficient responses to
qualify for oversampling.
4.5.2 Limitations and Directions for Future Research Our study has several limitations that suggest directions for future research.
First, we applied demographic weighting instead of more complex
weighting procedures such as propensity score weighting (PSW), widely used
for web survey studies (e.g Loosveldt and Sonck, 2008; Schonlau et al., 2009).
In practice, PSW is not applicable to website polls because the probability of a
respondent’s participation cannot be estimated (knowledge of background
characteristics requires participation). In online panel surveys, researchers can
derive this information from sampling frames. Future research might explore
whether complex weighting procedures result in smaller biases, thereby
warranting investment in collecting covariate information on the respondents.
Second, this study did not include conventional survey modes other than
telephone, such as postal mail or face-to-face interviews. Future research could
compare website polls with a broader range of survey modes.
Third, we did not address the design of the website poll, including
factors such as presentation of the polls, web page format, and incentive
scheme. We consider these issues to be promising avenues for future research.
By understanding the effects of types of questions, poll presentations, and
incentive schemes, models can be developed to reduce potential biases
resulting from this single mode of survey. Since website polls are voluntary by
nature, it is crucial to develop poll designs that are attractive to participants.
Fourth, our study was conducted with samples taken from one company
customer base and website (an insurance company). Different companies or
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industries may show different customer responses with regard to telephone or
online polls. For example, an insurance company website may attract only
visitors with (demographic) characteristics similar to the insurance company
customers. However, a fancy car company website may attract a wider range of
visitors who are not necessarily similar to the company customers or target
market. Replication of this study with a variety of companies or industries is
needed to understand to what extent the findings of this study can be
generalized.
Finally, we did not investigate the survey non-response. Although non-
response does not necessarily lead to non-response bias (Groves 2006), more
knowledge on this phenomenon in the specific case of website polls is needed
to better understand the non-response bias. A number of recent studies have
been conducted to examine the number of non-responses in online surveys
(e.g., Bruggen et al., 2011; Downes-Le Guin et al., 2012; Tehranian and
Bremer, 2012). These and other future studies on website polls will provide an
even richer understanding of how and when to apply website polls for customer
survey purposes. They will increase the usefulness of website polls as new and
promising customer survey instruments.
4.5.3 Practical Implications Interactivity is an important element of successful websites (Voorveld, Neijens,
and Smit 2009). Website polls can be used to make a site more interactive.
Most website polls or quick votes deal with trivial questions and merely serve
to entertain visitors. This study shows for simple questions, and after applying
demographic weighting, responses to website polls and telephone interviews
are not statistically different. This finding should encourage firms to further
explore the potential of website polls for customer research. Website polls are
attractive because they are cheap, fast, and easy to use. Website polls are
especially useful for exploratory purposes, such as capturing (prospective)
customers’ experiences and opinions. In terms of the costs and benefits of
web-based survey methods (Dahan and Hauser, 2000), development research
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projects can benefit from the cost and time advantages of website polls. Further
research on the design elements of website polls should increase our insight
into the usability and value of website polls for more complex market research
studies.
The preconception of academic literature is that website polls are
unscientific (e.g., Couper, 2000; Simsek and Vega, 2001). Although we cannot
completely remove this limitation, we can minimize it. IP recognition
technology or cookies, for example, can trace participants, limit participation to
only certain regions, and prevent multiple submissions (Ball, 2013; Eysenbach,
2005; Gosling et al., 2004; Tingling et al., 2003). To minimize self-selection
bias, questions used in website polls should not be sensitive. By placing
website polls on company websites, no just general web portals such as Yahoo
or news websites, companies can reduce discrepancies between website poll
participants and their target population. Website polls are a promising and
fruitful tool, not only for increasing website interactivity and entertainment, but
also for collecting useful customer data.
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Chapter 5 Conclusion and Implications Internet technology is evolving and new technologies are finding their way into
commercial tools. As new forms of online marketing instruments emerge,
Internet marketing has become a dynamic process. Recent research findings
(Huang, Yen, and Hun, 2012; Sparrow, Liu, and Wegner, 2011) suggest the
Internet may impact consumers’ cognitive processes and cognitive styles,
including their thoughts, perceptions and memories. In the context of
marketing communications, these findings suggest the effect of advertising on
the Internet is different from its effect on traditional media, such as television
and print. Some studies have shown these differences. For example, Dijkstra,
Buijtels, and Van Raaij (2005) found Internet advertising is less effective in
evoking cognitive responses than print and television advertising. Dahlen,
Murray, and Nordenstam (2004) found Internet advertising outperformed print
advertising in transferring implicit meaning. These results lead us to question
which aspects of advertising’s effect on traditional media hold true for Internet
adverting. Indeed, this question has been one of the main research agendas of
Internet marketing (Ha, 2008; Schibrowsky, Peltier, and Nill, 2007).
The main goal of this dissertation is to contribute to Internet marketing
literature by providing a greater understanding of how the Internet impacts
marketing and advertising research. To pursue this goal, we conducted three
studies, as described in Chapters 2–4. In Chapter 2, we examine the effect of
banner exposures characteristics (number of exposures, spacing, and delay) on
consumer memory measured by banner and brand awareness. Chapter 3
focuses on how banner exposure effect measures are interrelated. Finally,
Chapter 4 addresses the value of online polls, a form of self-selected Internet
survey, as a marketing research instrument for companies.
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The next section provides an overview and discussion of the findings
from the three studies. This overview is followed by a discussion of their
managerial implications. Finally, the dissertation concludes with some
limitations of the studies presented in this dissertation, as well as suggestions
for further research directions.
5.1 Overview of Main Findings and Theoretical Implications The main research question of Chapter 2 (Study 1) is how banner advertising
number of exposure, spacing, and delay impact consumer memory, in terms of
banner and brand awareness. By analyzing data from 21 banner campaigns in a
multilevel analysis setting, the study reveals that the effect of number of
exposures on consumer memory for both the banner and the brand is initially
positive but becomes less so as the number increases. It further shows the
effect of banner spacing on consumer memory follows an inverted U-shape. In
other words, the positive effect of banner exposures is greater if the time
interval between exposures is not too short or too long; our analyses reveal that
the optimal interval is around 60 minutes. However, enhanced memory
resulting from banner exposures eventually decays over time. Furthermore,
mediation analysis suggests banner exposures affect consumer brand memory
only when the exposures improve consumer memory for the banner itself.
The results of this study are mostly in line with previous research on
effects of number of exposures on consumer memory of traditional advertising
media (e.g., Appleton-Knapp, Bjork, and Wickens, 2005; Heflin and Haygood,
1985; Singh et al., 1988) and banner advertising (Drèze and Hussherr, 2003;
Havlena and Graham, 2004). In addition to these findings, further analyses
reveal new insights on how banner exposures effect banner and brand
awareness, thereby extending our knowledge of how banner advertising works.
First, it appears that awareness wear-out—when more repetitions have no
significant effect or even have a negative effect—does not occur in banner
advertising. This finding contrasts with general findings of field studies on
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brand information recall with regard to conventional advertising (e.g.,
Pechmann and Stewart, 1989, p. 295). Second, the observed spacing effect in
banner advertising follows a study-phase retrieval mechanism (Appleton-
Knapp et al., 2005), suggesting moderate spacing of banner exposures makes
consumers retrieve information from previous banner exposures, which in turn
enhances memory for the banner and information in the banner. Hence, the
consumer learning process associated with the brand is more effective if there
is just enough spacing time between exposures. Third, in contrast to previous
research on banner advertising (e.g., Drèze and Hussherr, 2002; Yaveroglu and
Donthu, 2008), our findings identify the importance of banner memory, and
highlight its crucial role.
Our goal in Chapter 3 (Study 2) is to determine the interrelationships
among banner effect variables to develop a comprehensive model that links
banner memory and attitude to brand memory and attitude, and ultimately to
purchase intention. In pursuing this goal, and in contrast to previous studies on
banner advertising effects, we examine the relationships between various effect
measures simultaneously. We analyze online survey data from respondents
who had been exposed to actual banner campaigns (29 campaigns in total),
using a multilevel structural equation modeling methodology. The main finding
of this study is that banner advertising—through banner memory, banner
attitude, brand memory, and brand attitude—exerts an indirect and positive
effect on purchase intentions. Although these effects of banner advertising are
mostly similar to those in traditional advertising, some notable differences are
revealed. First, we find the banner–brand memory relationship is stronger than
the banner attitude–brand memory relationship. This finding corroborates the
finding in Chapter 2 (Study 1) that memory for brands is mediated by memory
for banners. Second, we also find the strength of the banner–brand attitude
relationship is similar to that of the brand memory–brand attitude relationship.
These two findings indicate that the dual-mediation hypothesis, postulating that
the attitude towards the advertising is channeled through brand cognitive
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response to improve brand attitude, that fits well traditional media advertising,
may not fit banner advertising.
With regard to the use of survey data from self-selected online
respondents, Chapter 4 (Study 3) investigates whether companies can use
online surveys for their marketing research purposes. To answer this research
question, we conducted an experiment involving a telephone survey and a
series of online polls on a company website. Our analysis of the data from this
experiment provides several insights. First, not only do the respondent
characteristics differ between the two survey modes, they also differ from those
recorded in the company’s customer database. This reflects that conventional
communication media, such as land telephones, are used less and less, and the
superiority of probability surveys using this media cannot be warranted
because of increasing unreachability of part of the population (see also Blyth,
2008). Second, we find that response differences between both survey modes
are attributable to sample effects, not to survey mode effects. Third, in contrast
with previous studies, we find that demographic weighting can reduce the
response bias resulting from the sample effects between website polls and
telephone surveys. Compared to previous research on online surveys (e.g.,
Fricker et al., 2005; Roster et al., 2004; Schillewaert and Meulemeester, 2005;
Strabac and Aalberg, 2011), the findings of our study suggest the problem of
differences between a self-selected (online) survey and a simple random survey
can be alleviated. This finding may be related to the fact that our study
population is a company customer base and the online polls were placed on the
company website. Hence, there were no extremely under-represented (in terms
of general population) demographic groups that led to problematic weighting
(see Vehovar, Manfreda, Batagelj, 1999). Our finding that the response bias
can be alleviated suggests that in self-selected Internet surveys, the population
of reference and the location of online polls are important factors.
Some forms of Internet marketing instruments resemble their traditional
counterparts. For example, banners resemble print advertising and online polls
resemble paper- based polls. Nevertheless, this study shows the results, as well
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as the underlying processes, of these comparable forms of marketing
communication and research are not necessarily the same. Many expected
relationships that are built on theories from traditional marketing still hold, but
some notable differences are found. For example, how the eventual effect of
advertising exposures eventually affects purchase intention is not the same for
online banner and traditional advertising. The difference lies in the path taken
for the effect to work in the context of the hierarchy of effects. Given that in
Internet marketing, the effect of contextual factors of consumer information
processing (e.g., type and scheduling exposure pattern of the online
advertising) and their interactions are more complex, the effects of Internet
marketing efforts cannot be predicted only from currently available marketing
theories. Marketing theories may require refinement or adjustment to be
applied successfully in the Internet setting.
5.2 Managerial Implications The results of our three studies have important implications for how managers
can use the Internet as an effective marketing communication and marketing
research medium. We distinguish between implications for banner advertising
and implications for Internet marketing research.
5.2.1 Implications for Banner Advertising Advertising media planning is an aspect of marketing communication that
managers need to address. Media planning requires decisions about the best
media schedule for advertising exposures, given a certain budget and campaign
duration (Naik, Mantrala, and Sawyer, 1998). The findings of our research that
the number of banner exposures has a diminishing positive effect, and that
spacing has an inverted-U shape effect on consumer memory, imply the best
banner campaign scheduling strategy is even or continuous scheduling, rather
than massed scheduling. For best results, consumers should be periodically and
continuously exposed to the banner during the campaign period. Our empirical
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model suggests an optimal period of about one hour (i.e., a period
corresponding to the top of the inverted-U shaped response curve). In practice,
cookie technology makes this kind of scheduling manageable. The diminishing
effect of number of exposures also implies overexposure will impact budget
efficiency, suggesting budget spent on banner advertising will be no longer be
optimally effective after a number of exposures to the same consumer. In our
study, the first ten exposures increased the probability of banner recognition by
3 percent, but the next 30 exposures increased the probability only by 1
percent. To avoid overexposure, advertisers can also monitor the number of
banner exposures to individual consumers by using cookie technology.
Furthermore, when managers evaluate the effectiveness of the banner
campaign, the timing of the measurement is important, because we find
memory of banner exposures decays over time. Measuring banner effectiveness
directly after the exposure may overestimate the effects (e.g., Havlena and
Graham, 2004). Finally, since memory for the banners mediates memory for
the brands from banner exposures, it is important to have simple banners with a
clear message (e.g., brand names, logos, endorsers) that is easy to process and
requires minimum cognitive resources. However, simple banners must be
capable of attracting consumer attention.
Our research also suggests the effect of banner exposures goes beyond
banner memory. Study 2 shows that although both banner memory and effect
have a positive relationship with brand memory, the relationship is stronger for
banner memory. This implies that when banners are used for advertising, they
need to facilitate stronger links to the brand than to the banner. Therefore,
banners should not distract from their main function of increasing brand
awareness. Lovely figures, cute animals, or beautiful nature images in banner
design may attract attention, but they should not distract already-low consumer
attention from the brand name, logo, or claims. Given that banner exposures
increase brand awareness in the consumer’s mind, an important implication of
our study is that spending on banner advertising may be justified, despite the
evidence of recent data that show click-through rates for banner advertising are
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very low. Banner exposures affect banner memory; further, following a
hierarchy of effects, they improve brand attitude and increase brand purchase
intention.
5.2.2 Implications for Online Marketing Research The results of our research suggest a positive prospect for self-selected online
surveys posted on company websites, such as online polls. As more and more
people move to wireless communication devices, conventional surveys such as
random digit dialing are no longer more representative than online surveys,
because some population segments can no longer be reached through
traditional media. In Study 3, we find consumer characteristics in surveys are
highly affected by the characteristics of the users of that particular survey
medium, suggesting managers should consider mixed- mode surveys when
they need more representative responses. However, for a simple survey with a
specific target population—a common scenario in marketing research—a
company can use online polls as survey instruments to gather data for further
processing using statistical methods (e.g., weighting) to adjust possible biases.
Hence, in addition to including study questions, the polls should also include
background questions; such information is needed to correct bias, using
sample weighting methods. However, despite the potential of online polls,
some cautions still apply. Managers should ensure that ‘robots’ or automatic
submissions by software, multiple entries, or other attempts to bias the polls are
avoided by using appropriate Internet technology.
5.3 Limitations and Directions for Further Research There are several limitations to the findings of Chapter 2 (Study 1) and Chapter
3 (Study 2). First, due to limitations of our data, we were not able to study
effects of banner design (e.g., size, color). Previous studies (e.g., Chen, Ross,
Yen, and Akhapon, 2009; Li and Bukovac, 1999) indicate banner designs also
have effects on banner effectiveness measures. Studies 1 and 2 could be
extended to include banner design factors to examine their moderating effects
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on the relationships established in the studies. Second, the data used in our
studies are related to established brands only. Hence, the findings in both
chapters may not be generalizable to brands that are new or less popular. It
would be interesting and relevant to extend our research to the effectiveness of
banner advertising for newer and less popular brands. Third, we used cross-
sectional data to test the hypothesized relationships in a causal context (i.e.,
advertising hierarchy of effects). Although this research is based on a large
amount of data from a wide range of actual banner campaigns, thereby
increasing generalizability, experimental data could provide stronger evidence
for the suggested causality of our findings.
Our research also does not take into account the effect of other media
advertising the same brands concurrent to their banner advertising campaign.
This opens the door to future research that examines cross-media effects of
banner and other media advertising. By analyzing the advertising effect of
budget allocation among the media, Naik and Peters (2009) show synergies
between online and offline advertising. Zenetti, Bijmolt, Leeflang, and Klapper
(2014) find substantial interaction effects of various types of online and
television advertising. However, it is still a challenge to determine how optimal
synergies can be built from scheduling exposures across multiple media.
Managers are faced with questions about how many exposures, which order of
media exposures, and what delays between exposures within and across media
are most effective.
In Study 1, we do not test the effect of number of exposures, spacing,
and delay on brand attitude and purchase intention. By relating the findings of
Study 2 to the findings of Study 1, we can hypothesize that effects of banner
exposure characteristics on brand memory would also be observed on brand
attitude and purchase intention. Future research can be conducted to test this
hypothesis.
A major limitation in Chapter 5 (Study 3) is the sole use of telephone
survey as the traditional survey in our experiment. Previous research (e.g., De
Leeuw, 1992; Dillman and Christian, 2005) found differences between surveys
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Conclusion and Implication
91
using different traditional media. Future research could include other types of
traditional surveys in comparing the results with online polls. Another
limitation of this study is the format of online polls used in the experiment. We
use only one type of poll. Literature on online surveys indicates differences
between online survey formats, both in terms of response rates (Bethlehem,
2010) and results (Healey and Gendall, 2008). This limitation suggests our
study could be extended to include different online poll design aspects and
question types, for example, text only, decoratively visual, functionally visual,
and gamified (see Downes-Le Guin, et. al., 2012) in future experiments.
Further, given the limitations of the experimental setting, our study did not
elaborate on the effect of non-response bias. In some surveys, non-response can
be a significant source of survey response bias (Groves, 2006). Future research
could combine aspects of online poll design, types of questions, and non-
response effect on the quality of self-selected online surveys. By conducting a
more complex experiment involving these factors, the main effects as well as
interaction effects of these factors could be understood and the appropriate
action needed to minimize the bias of online surveys could be identified and
implemented.
Finally, online polls generate a massive amount of big data—often tens
of thousands of responses. When online polls are equipped with Internet
technology that collects even more data (such as IP recognition and geo-
tagging technology, with area demographics info and access times), they
provide market researchers with the opportunity to construct more
representative samples by employing statistical methods such as resampling
(Yu, 2003) and sample matching (Dickson, Deutsch, Wang, and Dube, 2006).
Future research could explore these techniques to overcome the potential bias
problem of online polls. Another avenue for future research is to use data
fusion methodology (e.g., Van Hattum and Hoijtink, 2008) to better understand
consumers. Users are increasingly accessing the Internet using their mobile
devices. Unlike Internet access through PCs, with issues related to cookies and
multiple users, the fact that one mobile telephone number represents one user
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Chapter 5
92
allows consumer Internet behavior to be tracked more closely and collected
more completely. With this kind of data, a wide range of research questions can
be addressed and answered. We believe that findings from the studies in this
dissertation can serve as a useful foundation for future research in Internet
marketing.
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Samenvatting (Summary in Dutch) Inleiding
Internet is steeds belangrijker geworden voor business-to-consumer-markten
(B2C). Zowel de waarde van online transacties als het aantal mensen dat online
aankopen doet neemt snel toe, en voorspellingen duiden erop dat deze groei zal
doorzetten. Maar dankzij de technische mogelijkheden is internet meer dan
alleen een transactiekanaal. Het is ook een medium voor het overbrengen van
marketingboodschappen (marketingcommunicatie) en het doen van
marktonderzoek. Binnen de context van marketingcommunicatie heeft internet
specifieke technologische voordelen boven andere, traditionele media als het
gaat om het doorgeven van marketingboodschappen. Daarom is het niet
verrassend dat er flinke bedragen worden uitgegeven aan online reclame. Als
medium voor het doen van marktonderzoek kan internet een veelheid aan
marketing-onderzoeksmethoden faciliteren, tegen lagere kosten en met snellere
resultaten.
Al sinds de opkomst van internet wordt er onderzoek gedaan naar de invloed
van internettechnologie op consumentengedrag. Echter, zowel het
marktonderzoek als de reclame-instrumenten op internet zijn aan verandering
onderhevig, en daarmee ook de manier waarop consumenten op reclame-
instrumenten reageren. Hierdoor ontstaan er hiaten in onze kennis. Dit
proefschrift heeft tot doel enkele van deze hiaten te vullen door meer te weten
te komen over de invloed van internet op onderzoek naar online marketing en
online reclame. In Hoofdstuk 2 laten we zien hoe de kenmerken van
bannerblootstelling van invloed zijn op het consumentengeheugen. In
Hoofdstuk 3 stellen we een model voor, waarin we de advertentie- en
merkmeetwaarden voor online bannerreclame in de context van een hiërarchie
van effecten plaatsen. In Hoofdstuk 4 bespreken we het potentieel van online
polls als marktonderzoeksinstrument. Ten slotte vatten we in Hoofdstuk 5 de
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belangrijkste conclusies van dit proefschrift samen, bespreken we de
bevindingen in het algemeen, en geven we mogelijkheden aan voor verder
onderzoek.
Hoofdstuk 2
De belangrijkste onderzoeksvraag van Hoofdstuk 2 is hoe het
consumentengeheugen wordt beïnvloed door het aantal blootstellingen, de
spreiding (spacing) en vertraging, met betrekking tot merk- en
bannerbekendheid. Uit onze studie blijkt dat het aantal blootstellingen in eerste
instantie een positief effect heeft op het consumentengeheugen, zowel voor de
banner zelf als het merk, maar dat dit effect minder wordt naarmate de
hoeveelheid blootstellingen toeneemt. Verder toont de studie aan dat het effect
van de spreiding tussen het laten zien van de banners (banner spacing) een
omgekeerde U-vorm volgt. Met andere woorden, het positieve effect van
blootstellingen aan banners is groter wanneer er niet te veel maar ook niet te
weinig tijd tussen de blootstellingen zit. Het verbeterde merkgeheugen ten
gevolge van het aantal blootstellingen neemt echter na enige tijd weer af.
Verder opperen mediation-specialisten dat het merkgeheugen van consumenten
alleen wordt beïnvloed door bannerblootstellingen indien de blootstellingen
ook het geheugen van de consument voor de banner zelf vergroten.
De bevindingen van deze studie komen goeddeels overeen met eerder
onderzoek naar de invloed van bannerblootstellingen op het
consumentengeheugen, zowel in de traditionele advertentiemedia (bijv.
Appleton-Knapp, Bjork en Wickens, 2005; Heflin en Haygood, 1985; Singh et
al., 1988) als bij bannerreclame (Drèze en Hussherr, 2003; Havlena en Graham,
2004). Naast deze bevindingen biedt deze studie nieuwe inzichten in de wijze
waarop merk- en bannerbekendheid worden beïnvloed door
bannerblootstellingen. Dit vergroot onze kennis van hoe bannerreclame werkt.
Allereerst lijkt het zo te zijn dat het gaan vervelen van de boodschap – ook
wear-out genoemd, waarbij vaker herhalen geen effect meer heeft, of zelfs een
negatief effect heeft – niet optreedt bij bannerreclame. Dit is in contrast met
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115
wat er gewoonlijk wordt gevonden in praktijkstudies over het onthouden en
reproduceren van merkinformatie met betrekking tot conventionele
advertentiemethoden (bijv. Pechmann en Stewart, 1989, p. 295). Ten tweede
verloopt het gevonden spreidingseffect bij bannerreclame volgens een
studiefase-retrievalmechanisme (Appleton-Knapp et al., 2005), wat suggereert
dat een matige spreiding van bannerblootstellingen ervoor zorgt dat
consumenten zich de informatie van eerdere blootstellingen herinneren, wat er
op zijn beurt weer voor zorgt dat de banner en de informatie uit de banner beter
onthouden worden. Dit betekent dat het leerproces van consumenten met
betrekking tot het merk effectiever is wanneer er precies genoeg tijd tussen de
blootstellingen zit. Ten derde, en in tegenstelling tot eerder onderzoek naar
bannerreclame (bijv. Drèze en Hussherr, 2002; Yaveroglu en Donthu, 2008),
hebben onze bevindingen het belang van bannergeheugen aangetoond; het
merkgeheugen wordt indirect beïnvloed door bannerblootstellingen. Banners
die geen aandacht trekken of slechts in beperkte mate door de consument in
zich worden opgenomen, dragen niet bij aan verbetering en herinnering van het
geadverteerde merk.
Hoofdstuk 3
Het doel van onze studie in Hoofdstuk 3 is het bepalen van de interrelaties
onder banner-effectvariabelen, met als doel de ontwikkeling van een
allesomvattend model dat bannergeheugen en -attitude koppelt aan
merkgeheugen en -attitude, en uiteindelijk aan koopintentie. Om dit doel te
bereiken onderzoeken we tegelijkertijd de relaties tussen verschillende
effectmetingen; dit in tegenstelling tot eerder uitgevoerde studies over de
effecten van bannerreclame. We analyseren online enquêtegegevens van
respondenten die waren blootgesteld aan echte bannercampagnes (29
campagnes in totaal). Hierbij maken we gebruik van een methodologie met
meerlagige structurele vergelijkingsmodellen. De belangrijkste bevinding van
deze studie is het feit dat bannerreclame een indirect en positief effect heeft op
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Samenvatting (Summary in Dutch)
116
de koopintentie, door middel van bannergeheugen, bannerattitude,
merkgeheugen en merkattitude.
Maar hoewel deze effecten van bannerreclame voor het grootste deel
overeenkomen met de effecten van traditionele advertentiemethoden, dat wil
zeggen, de hiërarchie van effecten van adverteren, zijn er enkele opvallende
verschillen waargenomen. Ten eerste is gebleken dat de relatie tussen
bannergeheugen en merkgeheugen sterker is dan die tussen bannerattitude en
merkgeheugen. Deze bevinding bevestigt de bevinding uit Hoofdstuk 2, dat het
geheugen voor banners een indirecte bijdrage levert aan het geheugen voor
merken. Ten tweede is gebleken dat de relatie tussen bannerattitude en
merkattitude ongeveer even sterk is als die tussen merkgeheugen en
merkattitude. Deze twee bevindingen duiden erop dat de dual-
mediationhypothese, die goed aansluit bij adverteren in traditionele media en
die poneert dat de attitude ten opzichte van de advertenties door cognitieve
merkrespons wordt gestuurd om de merkattitude te verbeteren, mogelijk niet
passend is voor bannerreclame.
Hoofdstuk 4
Hoofdstuk 4 onderzoekt of bedrijven online enquêtes kunnen gebruiken voor
hun marktonderzoeksdoelen. Om deze onderzoeksvraag te beantwoorden,
hebben we een experiment uitgevoerd. Hiervoor hebben we een telefonische
enquête en een reeks online enquêtes op een bedrijfswebsite uitgevoerd. Onze
analyse van de data uit dit experiment heeft diverse inzichten opgeleverd. Ten
eerste is er niet alleen een verschil in respondentkenmerken tussen de twee
enquêtesoorten onderling, maar verschillen de kenmerken bovendien van de
kenmerken die zijn vastgelegd in de klantendatabase van het bedrijf. Ten
tweede is gebleken dat het verschil in de antwoorden tussen beide soorten kan
worden toegeschreven aan de steekproeftrekking, en niet aan het effect van de
enquêtesoort. Ten derde is gebleken dat een demografische weging de
responsvertekening die voortkomt uit de steekproeftrekking tussen de online
poll en de telefonische enquête kan verminderen. Dit komt niet overeen met
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Samenvatting (Summary in Dutch)
117
bevindingen uit eerdere studies. In vergelijking met eerder onderzoek naar
online enquêtes, wijzen de bevindingen uit onze studie erop dat het probleem
van verschillen tussen een (online) enquête op basis van zelfselectie en een
eenvoudige willekeurige steekproef kan worden verminderd indien er geen
sterk ondervertegenwoordigde demografische groepen zijn (vergeleken met de
algemene bevolking) die tot een problematische wegingsfactor leiden. Onze
bevinding dat de responsvertekening kan worden verminderd, wijst erop dat de
referentiepopulatie en de locatie van de online polls belangrijke factoren zijn
bij internet-enquêtes op basis van zelfselectie.
Gevolgen voor marketingtheorie
Sommige vormen van internetmarketing lijken op hun traditionele
tegenhangers. Zo lijken banners bijvoorbeeld op gedrukte reclame en lijken
online polls op papieren enquêtes. Desondanks blijkt uit deze studie dat de
resultaten, evenals de onderliggende processen, van deze vergelijkbare vormen
van marketingcommunicatie en marktonderzoek niet noodzakelijkerwijs
hetzelfde zijn. Veel verwachte relaties die zijn gebaseerd op theorieën uit de
traditionele marketing houden stand, maar er zijn enkele opvallende verschillen
gevonden. Zo is bijvoorbeeld de manier waarop het uiteindelijke effect van
blootstelling aan advertenties van invloed is op de koopintentie niet hetzelfde
voor bannerreclame als voor traditionele reclame-uitingen. Het verschil zit in
het pad dat moet worden afgelegd zodat het effect werkt binnen de context van
de hiërarchie van effecten. Aangezien het effect van de contextuele factoren
van informatieverwerking door consumenten (bijv. type en planning van het
blootstellingspatroon van de online reclame) en hun interacties complexer zijn
in het geval van internetmarketing, kan de uitwerking van de
internetmarketing-inspanningen niet alleen worden voorspeld aan de hand van
de marketingtheorieën die op dit moment beschikbaar zijn. Mogelijk moeten
marketingtheorieën aangepast of verfijnd worden voordat ze succesvol kunnen
worden toegepast in een internetomgeving.
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Gevolgen voor managers
De bevindingen van ons onderzoek dat het aantal bannerblootstellingen een
afnemend positief effect heeft, en dat spreiding een omgekeerd u-vormig effect
heeft op het consumentengeheugen, wijzen erop dat een gelijkmatig of
doorlopend schema een betere strategie is voor een bannercampagne dan
massed scheduling. Voor het beste resultaat moeten consumenten periodiek en
doorlopend aan de banner worden blootgesteld tijdens de campagneperiode.
Uit ons empirische model blijkt een optimale periode van ongeveer een uur
(d.w.z., een periode die overeenkomt met de bovenkant van de omgekeerde u-
vorm van de responscurve). In de praktijk is dit type planning uitvoerbaar
dankzij cookie-technologie. Verder is de timing van de meting van belang
wanneer managers de effectiviteit van de bannercampagne evalueren,
aangezien uit ons onderzoek is gebleken dat de herinnering aan
bannerblootstelling in de loop der tijd afneemt. Wanneer de bannereffectiviteit
direct na de blootstelling wordt gemeten, worden de effecten mogelijk
overschat (bijv. Havlena en Graham, 2004). Ten slotte, aangezien het geheugen
voor banners door middel van bannerblootstelling een indirecte bijdrage levert
aan het geheugen voor merken, is het belangrijk dat de banners eenvoudig zijn
en een heldere boodschap hebben (bijv. merknamen, logo's, endorsers) die
eenvoudig verwerkt kan worden en een minimum aan cognitieve belasting
kost. Eenvoudige banners moeten echter wel in staat zijn de aandacht van
consumenten te trekken.
Ons onderzoek lijkt er ook op te wijzen dat het effect van bannerblootstelling
het bannergeheugen overtreft. Uit Studie 2 blijkt dat zowel bannergeheugen als
-effect weliswaar een positieve relatie hebben met merkgeheugen, maar dat de
relatie sterker is voor bannergeheugen. Dit duidt erop dat wanneer banners
onderdeel zijn van een reclamecampagne, die banners moeten zorgen voor een
sterkere koppeling naar het merk dan naar de banner. Banners moeten derhalve
niet afleiden van hun belangrijkste doel: het vergroten van de merkbekendheid.
Mooie figuurtjes, schattige beestjes of fraaie natuurplaatjes in een
bannerontwerp kunnen weliswaar de aandacht trekken, maar mogen de toch al
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beperkte aandacht van de consument niet afleiden van de merknaam, het logo
of de argumenten. Aangezien bannerblootstelling de merkbekendheid bij de
consument vergroot, is een belangrijke gevolgtrekking van onze studie dat het
gerechtvaardigd kan zijn om geld uit te geven aan bannerreclame, hoewel
recente gegevens hebben aangetoond dat het doorklikpercentage zeer laag is.
Bannerblootstelling is van invloed op bannergeheugen; bovendien zorgt
bannerblootstelling er via een hiërarchie van effecten voor dat zowel de
merkattitude als de koopintentie voor het merk wordt verbeterd.
De resultaten van ons onderzoek wijzen op een positief vooruitzicht voor
online enquêtes op basis van zelfselectie die worden gepubliceerd op websites
van bedrijven, zoals online polls. Naarmate er meer mensen gebruik maken van
draadloze communicatie-apparaten, zijn gebruikelijke enquêtevormen zoals
Random Digit Dialing niet meer representatiever dan online enquêtes, omdat
bepaalde bevolkingsgroepen niet meer via traditionele media bereikt kunnen
worden. Uit Studie 3 is gebleken dat de consumentenkenmerken binnen
enquêtes sterk worden beïnvloed door de kenmerken van de gebruikers van het
desbetreffende medium, wat erop wijst dat managers gemengde enquêtevormen
moeten inzetten wanneer ze een representatievere respons nodig hebben.
Echter, voor een eenvoudige enquête met een specifieke doelgroep — een
veelvoorkomend scenario bij marktonderzoek — kan een bedrijf online polls
inzetten als enquête-instrument om gegevens te verzamelen die verder verwerkt
zullen worden. Hierbij kunnen statistische methodes zoals weging worden
ingezet om mogelijke vertekening bij te stellen. Derhalve moeten zulke polls
niet alleen onderzoeksvragen bevatten, maar ook vragen naar
achtergrondinformatie. Die informatie is nodig om vertekening te corrigeren
met behulp van weging op basis van steekproeftrekking. Ondanks de potentie
van online polls zijn er nog wel enkele waarschuwingen van toepassing.
Managers moeten juiste internettechnologie toepassen om 'robots' (automatisch
invullen van de poll door software), meervoudige deelname en andere
pogingen om de poll te beïnvloeden te ontwijken.