The link between Creativity and Bipolar Disorder: A Systematic Review
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Transcript of The link between Creativity and Bipolar Disorder: A Systematic Review
The link between Creativity and Bipolar Disorder:
A Systematic Review
Silvia Zarraluqui López
MSc: Mental Health. Psychological Therapies
Barts and the London Institute of Psychiatry Queen Mary University
London August 2012
(10035 words)
2
AKNOWLEDGEMENT ...................................................................... 3
ABSTRACT ........................................................................................... 4
INTRODUCTION ................................................................................ 6
RESEARCH QUESTIONS: AIMS, OBJETIVES: ......................... 18
METHODOLOGY ............................................................................. 20
QUALITY ASSESSMENT ................................................................ 30
RESULTS ............................................................................................ 35
MAIN FINDINGS ............................................................................... 53
DISCUSSION ...................................................................................... 61
BIBLIOGRAPHY ............................................................................... 68
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AKNOWLEDGEMENT
I wish to acknowledge my tutor Nassir Warfa for guide me
through the world of the systematics reviews, with patience and
professionalism.
I would like to thanks also the professor Gella Richards for
motivating and encouraging me to do a systematic review about
creativity, and finally to my family for their patience and
support.
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ABSTRACT
There is a common consensus about the existence of a link
between creativity and madness, and this unanimity is empirically
supported. During the last 30 years a high number of studies have
investigated the nature of the relationship between bipolar
disorder and creativity. One of the main questions that are
creating disagreements in the scientific community is the
definition of creativity. The aim of this study is to provide a
detailed synthesis of the mayor findings obtained in this field and
present a converging summary of the mechanisms that underline
the relation between creativity and bipolar disorder. Thirteen
papers were selected using electronic databases like MEDLINE,
CENTRAL (Cochrane Central Register of Controlled Trials),
PsycINFO, ELSEVIER SD, SCIVERSE science direct and APA
PSYCnet. Case-control studies were used due to the nature of the
variables. Only participants suffering some kind of mood disorder
were included, excluding those ones that had any kind of
psychotic disorder or schizophrenia. The age inclusion criterion
comprehends children on the range between nine and eighteen
years old, and adults in between eighteen and sixty four years old.
The results suggested that bipolar disease in linked with
creativity, and that this relationship is related to a hyperthymic
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affective pattern. Bipolar descendants have higher creativity than
healthy control offspring. Some temperamental variables as
neuroticism, cyclothymia, dysthymia, openness and intuition
were significantly positive correlated with creativity. The overlap
between bipolar disorder subject’s results and creative control
subject’s results on the measure tools of creativity suggest that
there could be some neurobiological commonalities. There were
some limitations, like the restriction of sources used, the use of
case –control studies, the risk of “over-matching” and the sample
selection. Clearly future studies are needed to clarify the
correlation between mania and creativity in Bipolar Disorder.
Keywords : Creativity. Bipolar Disorder. Temperament.
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Introduction
If we analyzed almost all the human history, creativity was
assumed to be a privilege of supreme existences. A lot of
religions are based on mythologies in which Gods molded the
firmament and the earth. It was only very recently that the
situation overturned: Men and women started being the creators
and the Gods the inventions of their imagination.
(Csikszentmihalyi, M.1996). Although we cannot predict the
ultimate results of creativity, at least we can try to understand this
potency and how it works. Creativity is a product of the
interaction of a structure constituted of three components: A
culture that contains figurative guidelines, an individual who
brings innovation into the symbolic area, and a group of
specialists who identify and authenticate the invention.
(Csikszentmihalyi, M. 1996) Creativity is the cultural
corresponding of the process of genetic changes that generates
consequences in genetic evolution. On creativity there are not
procedures equivalent to the ones that follow the DNAs since a
idea or discovery is not automatically delivered to the next
generation, the analogy is that creative ideas are elements of
evidence that we must study if we want culture to continue. These
components of knowledge are the ones that a creative person
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modifies, and if sufficient persons understand the alteration as
one advance, it will start being part on our culture background.
(Csikszentmihalyi, M.1996). Creative discoveries are unthinkable
without having a previous comprehension of what is happening in
the field, without the academically networks that inspires to
meditate and think, and without the social institutions that
accepted and spread the novelties. (Csikszentmihalyi, M. 1996) A
creative person if wants to create anything, they must first started
to dedicate their attention to the material that has to be studied,
and attention is a limited ability, since a great amount of our
limited forces are focused on surviving day by day. There are
some considerable effects that appeared if we followed these
ideas: to be a creative person in an existing domain; this person
must have extra capacity of attention available.
(Csikszentmihalyi, M. 1996) .As cultures progress, it becomes
progressively more and more difficult to control more than one
area of knowledge; therefore creative subjects with specialized
knowledge in one field will have more opportunities of creating
new ideas over people with generalized knowledge. An important
consequence that appears when they limited their attention is that
creative individuals could be viewed as egotistical, self-centered,
and cold, but in fact creative people are just focused and
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dedicated. (Csikszentmihalyi, M.1996). Considering these
temperamental differences the idea about a connection between
creativity and a mental disease is been considered during
hundreds of years, but until the last century questions about the
nature of this association have not been considered in the
scientific world.
Nowadays there is a common consensus about the existence of a
link between creativity and madness, and this unanimity is
empirically supported. The unresolved questions are about what
exactly type of mental illness, psychosis, schizophrenia or
affective disorder, is related with the creative behavior. One of
the main questions that are creating disagreements in the
scientific community is the definition of creativity. Creativity is
conceptualized in many different ways, as a single construct, as a
continuum and in different forms. Each way to describe the
creativity it is also influenced by the implication creativeness
with some mental pathologies. Creative genius conceptualizes
creativity as a performance that involves effortless and the
unconscious, it appears in moments where the cognitive functions
were disinherited and not guided by a goal. (Martindale 2007)
Other authors like (Amabile, 2010), described creativity as a
characteristically human ability to generate new ideas, new
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attitudes and new explanations”. However, other approaches
consider that the current concept of creativity is poor and
inappropriate, because it only takes into account the operational
level of the activity: creation. Kaufmann (2003) distinguishes
between six types of novelty: The one, which comes from the
stimulus, the one that comes from the response, proactive,
reactive, “Big C” or eminent creativity and “mini C”. Kaufmann
gave us a new dimension to explore, the “eminent or “Big C”
creativity”, following this line Nora Madjar (2011) published an
article proposing that creativity is based on ideas that conform a
continuum. This continuum goes from radical ideas that create
revolutions to routine performance, considering the existence in
between of other options like incremental creativity, radical
ideas… being all this concepts potentially positive. She created
the new term of “radical or divergent” creativity, being that
activity, which generates ideas, that are substantially different
from the existing ones, and did not fit into the current
organizations and practices. These ideas form new frames and
processes. Nora Madjar (2011) showed that inclination to take
risks and have resources and dedication are related to radical
creativity. According to this position, when individuals are
challenged with a new situation, they tried to understand and
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handle it by creating their own explanation and significance of it.
This behavior provides new aims and incentives for the next
accomplishment (Nora Madjar, 2011). She underlined as
especially important is the “sense making theoretical
framework”, which is based on Ford’s (1996) interpretation of
creativity. This theoretical framework believes that creative
activities are the opposing behavior that appears when the options
available are restricted or does not answer our requirements.
(Nora Madjar, 2011). Individuals use the creativity to negotiate
between conflicting structures of reference assumed by the
different groups they are subordinate with. This model suggest
that when a creative person made the choice to be involved in a
creative task, apart on the personal and circumstantial issues,
involves complex cognitive processes. Following this approach,
“the sense making” assessment of creativity, offers a valuable
structure to understand the causes of how individuals understand
and perceive a setting and how and how they perceive the to
create something new. Furthermore, this perspective contributes
to prevailing models of creativity by recognizing the role of the
person´s interpretation of the context. (Nora Madjar, 2011).
However those are only some theoretical approaches, creativity is
not an isolated concept, is strongly correlated to the
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environmental forces. Hennessey and Amabile in 2010
represented these forces in concentric circles (figure 1) in which
“creativity forces perform”.
Figure 1 (Hennessey, Amabile, 2010)
As Csikszentmihalyi, (1996) said, creativity does not happen
exclusively inside people´s mind, but in the interaction between a
person´s opinions and feelings and a socio-cultural environment.
It is a general rather than an individual phenomenon. Adding to
that creative expressions are universal phenomenon that appears
in all cultures. Rudowicz (2003) argued that the relationship
between creativity and culture is complex and historically,
socially and individually biased.
As we could see there is multitude of approaches to assess the
definition of creativity. The majority of then generally have
restrained correlations. Because the multiple forms to define the
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paradigm, researches have also considered the abilities that
conform the creativity as paradigms. Jonshon in 2012 published a
small sample of the different test that was made to measure the
abilities linked with creativity. Many of them are founded on
conceptual models. For example the Remote Associates Task
(RAT), (Mednick, 1967), measure the creativity trough the study
of the ability to generate associations, therefore considering
creativity as the capacity of produce a broad series of
associations. Other tests provide measures of originality, fluency
and flexibility like the Unusual Uses Task (Guilford, 1967), in
this test creativity is conceptualized as the ability to propose no
redundant uses for things, the capacity of generate new categories
inhibiting the prior responses. Jonshon (2012) finally
distinguished two kinds of processes that we use to solve the
creativity difficulties: The logical, systematic, conscious way and
the insight, unaware process. This last one refers to the state were
the person is not consciously aware of the process that he or she
is using to solve a problem, doing new combinations, relating
distant concepts. In sum, the literature about creativity is broad
and full of different paradigms trying to reach the definition of
the concept. This is one of the mayor troubles of the field.
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It was only recently centuries Bipolarity and Creativity have been
linked. In general it is considered that many artists suffered mood
disorders, and their creativity increased especially during the
manic periods. During the last 30 years a high number of studies
have investigated the nature of this relationship. Some of them
have considered that creativity is a risk factor to developing a
bipolar disorder; others cite creativity as a consequence of the
mood disturbance.
Bipolarity is an illness that encompasses a wide variety of manic
and suppressive symptoms with different severity and variations.
The main symptoms are: “vivaciousness and touchiness, reduced
need for rest, speeding thoughts, extreme self-assurance,
augmented vigor, psychomotor tension, and inclination to engage
in reward-oriented comportments without respect of possible
negative costs (American Psychiatric Association, 2000).
Generally the illness is classified into three subtypes: Bipolar
Disorder I, Bipolar Disorder II and Cyclothymic disorder. The
RDC (Spitzer et al.1978) divided the Mood disorders into Maniac
disorders characterized by elevated, expansive or irritable mood.
Hypomanic disorder categorizes the nonpsychotic manic-like
states that do not have enough intensity or impairment to meet
manic criteria. Bipolar Depression with Mania (Bipolar I) is a
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category that refers to the subjects who met the standards of a
manic syndrome and depressive syndrome, which could be major,
insignificant or sporadic depressive disorder. Bipolar Depression
with Hypomania (Bipolar II) is diagnosed when any patient has
congregated the conditions for hypomanic and depressive
disorder together, but has never suffered a full manic disorder.
This variation is included because some evidence indicates that
the people suffering Bipolar II disorder has a nearer relationship
to Bipolar I than to a Unipolar Depressive Disorder. Akiskal and
Pinto (1999) said that Bipolar Disorder I and Cyclotimyc disorder
meet all the criteria in the “bipolar spectrum”, while patients with
Bipolar II Disorder sometimes have “only” one manic episode.
Patients with Bipolar Disorder II usually present also less severe
hypomanic episodes. Finally, Cyclothymic Disorder draws
situations of chronic changes between low and high mood states
that are not strong enough to be classified as manic or depressive
episodes.
There is a long history of investigation into the relationship
between creativity and bipolarity. Initially a scientist called
Nancy Andreasen undertook what we used to consider the “the
landmark” study in 1987;subsequently Kay Jamison published a
very influential work in 1989, after in 1993 wrote “Touched With
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Fire: Manic Depression and the Artistic Temperament”(Jamison,
993), which is one of the most important works ever published in
this field. Later in 1995 Arnold Ludwig write “The Price of
Greatness: Resolving the Creativity and Madness Controversy”,
another important piece of research. As an example of studies
that support the correlation between mood disorders and
creativity, some Vellante et al. (2011) founded that in a sample of
non-clinical professional artist, creative people had higher scores
comparing to the control group, on the “CAQ and on the
cyclothymic, hyperthymic and irritable sub-scales of the TEMPS-
A, however not on the GHQ”. They had found as well that those
people on the risk for bipolar spectrum (Vellante et al. (2011)
specially trough the cyclothymic aspects. Creativity is mainly
related to mania episodes as described by the tools to measure the
sub-syndromal manic symptoms like as the General Behavior
Inventory (GBI), ( Depue, Krauss, Spoont et al. 1989), and
measured by the Hypomanic Personality Scale (HPS);( Eckblad,
Chapman, 1986). For instance Ma (2009) or Ludwig (1992)
demonstrate a high level of prevalence of this disorder on a
creative population, specially linked with the mania episodes.
(Goodwin, Jamison 2007; Rothenbergm 2001). Carlson and
Goodwin defined the stages of mania in 1973 as: Stage 1:A Slight
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distressed speech, divergent, hyperactive, and joyful. Stage 2:
Paranoid, hyper-religious, hyper verbal, patrolling and feelings of
grandiosity. Stage 3:Hyper verbal, delusional, terrified, labile,
suspicious, sexually preoccupied, disoriented and angry. Stage 2:
Still paranoid but more cooperative, agitated, hypersexual,
manipulative and angry. Stage1: Calmer, more organized, over
conversational, seductive, and depressed.
In the following graphic we could see how Jonshon in 2012,
represented the relationship between Bipolar Disorder and
Creativity, being the “Risk of Mania” one of the fourth main
factors that contributes to reinforce this correlation.
Figure 2. (Jonshon et al. 2012)
Bipolar Disorder Creativity
Diagnosis Risk for Mania
Family History
Related traits
Activity Preference
Divergent thinking Related
traits
Eminence achievement
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However there are some limitations on the studies that have been
done about creativity and bipolar disorder. First most of the
researchers were concentrate in one part of the field, being
sometimes unaware about the advances in other disciplines
related to the psychology of creativity. (B.A. Hennessey. M.
Amabile (2010)). Others have used small sample size, becoming
their findings insignificants, for instance Vellante et al. 2011)
founded that a significant number of studies that show a
connection between Bipolarity and creativity were founded on
insignificant, non-randomly selected samples, considered
retroactive explanations on psychopathology. Finally there are
some researches that have founded these results inconsistent. For
instance De Dreu et al. (2008), or Friedman et al. (2007) showed
that how affect the bipolar disorder the creativity is not yet
settled. Chavez-Eakle and colleagues (2001) discovered trough a
sample of highly creative population that they punctuated low
scores on bipolarity, concluding that mood disorders are more
related with personality instead of creativity.
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RESEARCH QUESTIONS: AIMS, OBJETIVES:
As explained in the introduction, theories of a relationship
between creativity and bipolar disorder date back fifty years.
Even recent work exposed a strong association between bipolarity
and creativity. However, questions still remain regarding what
mechanisms underline such associations, and how an illness that
potentially threatens and constrains life could be advantageous to
becoming an artist. The research undertaken juggled with
different reasons that could explain this link; it involves affective
and cognitive components, talent, motivation, neurobiological,
and environmental factors. Since explanations of the mechanism
that underline such relation are beginning to emerge and more
investigation is needed, this study is going to conduct an
exhaustive review of the most representative literature relevant to
our research question: How is creativity related to bipolarity?
The aim of this study is to provide a detailed synthesis of the
major findings obtained in this field, selecting a small but
representative division of studies, and presenting a converging
summary of the mechanisms that underline the relationship
between creativity and bipolar disorder.
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The objectives are to investigate
• Whether bipolar disease is linked to creativity.
• The genetic basis of the relationship between bipolarity and
creativity through familial studies.
• How some temperamental features influence the
development of creativity.
• The neurobiological link between creative behavior and
bipolar disease
• Gaps in current research that need to be investigated
• Provide useful recommendations for future research
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METHODOLOGY
The Systematic review is a valuable and an extremely useful
scientific tool, considering that researchers and health
professionals are generally overwhelmed with a large amount of
information. There is a necessity to integrate all this information
in order to identify the most significant data for policymaking. A
good systematic review presents the most consistent findings that
could be generalized across population and the methodology used
instills confidence in professionals about the accuracy of the
results obtained. (Mulrow, 1994).The first reason for the
necessity of this tool is the vast amount of articles published
every year, making it impossible for the investigator to read all of
them and be up-to-date in the field. (Mulrow, 1994). The second
reason that justifies the use of this instrument is the necessity of
providing a summary of the most important and critical results
obtained to the analysts that create health policies. This assists in
the formulation of new strategies and legislation concerning
diagnosis and treatment approaches. The third reason is that it
aids researchers in avoiding possible setbacks or difficulties and
refines their objectives and research questions. (Mulrow, 1994) A
systematic review prevents any deviations or new research in
previously explored fields, and enables a faster implementation of
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the diagnostic/treatment strategies. This tool is also one of the
search strategies that allow more generalization of the results,
since it reviewed very diverse studies. It also provided a more
realistic context of the field, sometimes not available in any
randomized controlled trials, quasi-experimental studies or
observational designs. (Mulrow, 1994) Finally, linked with the
capacity of generalization that the systematic reviews gave us,
another strength of this methodology is the information regarding
the consistency of the relationships between variables, and vice
versa the systematic reviews explain data deviation and disparity,
and whether findings are effective.
Search Strategy
Following PICOS strategy the data extracted for this review is in
this summary:
Population Patients suffering any mood disorder (BD, MDD,
Cyclothymia )
Intervention Measure their creativity through different tools.
Comparator Creative and Healthy people without any mood disorder
Outcome Creativity performance
Study design Randomized controlled trials and quasi-experimental studies
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The databases used for this research were the ones linked with
the catalogues of Queen Mary Library, the British Library and
The Senate House Library. The electronic databases were
MEDLINE, CENTRAL (Cochrane Central Register of
Controlled Trials), PsycINFO, ELSEVIER SD, SCIVERSE
science direct and APA PSYCnet. Another important way of
obtaining the articles was searching through the Journal of
affective Disorders.
The terms used during the research were:
Independent Variable dependent variable
Bipolar Disorder Creativity
Mood Disorder Art
Bipolarity Artist
Mania Genius
The process of data extraction ended with a large number of
potentially interesting papers, but only a few of these studies were
selected. A designed protocol was followed in order to minimize
mistakes and bias that could appear during the selection process.
The first selection was made based on titles and abstracts. The
majority of the papers were rejected because the paper was not
focused on the research question, for instance papers where the
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concept of creativity was linked to other mental health problems
such as schizophrenia. Other papers were excluded due to the
methodological approach; for example, some papers were
observational case- studies that specified a large amount of
research about individuals like the composer Schuman or the
writer Virginia Woolf.
In the second stage papers where the full text was unavailable
were excluded, as were duplicate papers.
In the third and final stage some papers were removed due to
their unsuitability with the exclusion criteria. For instance, in this
stage papers such as “The Link Between Bipolar Disorders and
Creativity: Evidence from Personality and Temperament Studies”
(Srivastava, Ketter 2010), and “Art, alpha-1-atitrypsin
polymorphisms and intense creative energy: Blessing or
curse?”(Everett, 2007) were excluded. The former due to the
methodological approach, and the latter paper because the
biological content was not suitable to compare to other papers.
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Each paper of this review has been selected following clear
criteria regarding the study strategy. Certain study designs are
methodologically stronger than others, while other designs are
comprised of more detailed information even they are less robust,
(for example the observational studies). In this area of study an
assortment of study strategies is needed in order to adopt diverse
variables in the same review.
Inclusion and exclusion criteria
Study characteristics
Only studies whose aims were to find a relationship between
creativity and mood disorders were incorporated. Also considered
were those who studied the nature of the association. Prospective
cohort studies were excluded since the purpose of the review is to
find a correlation between the variables at the present time. To
study the consequences of the link between creativity and
bipolarity across time is an objective excluded and postponed for
future investigations. Case-control studies were included due to
the nature of the variables, it being necessary to compare groups
from the same population (creative people, members of the same
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family) with and without a mental disorder, therefore the risk of
“over-matching” has been considered when the groups were
made to make them comparable for possible confounding
features. One cross sectional study is included (Soeiro de Souza
et al. 2011), because of the nature of the study and the useful
information it provides.
Participants
Only participants suffering some kind of mood disorder were
included, excluding those that had any kind of psychotic disorder
or schizophrenia. This criterion involved subjects that suffered
from Bipolar Disorder I or II, Cyclothymia and Major Depressive
Disorder. Patients with a comorbid illness were also included
especially the bipolar progenies see (Simeonova et al. 2005), pg.
626. For example, Oppositional Defiant Disorder (ODD),
Conduct Disorder (CD) and other anxiety disorders like a general
anxiety disorder, separation anxiety disorder, obsessive-
compulsive disorder, social phobia, and post-traumatic stress
disorder. In the case of the control group, healthy creative
participants have been included.
The age inclusion criterion consists of children between the ages
of nine and eighteen, and adults between eighteen and sixty four
years old. College students have also been included; even though
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the age was not specified. Finally, the Forgeard (2008) study does
not indicate the overall age of the participants, but it has been
included as an exception in this case due to the nature of the study
Intervention and setting
All the settings where the intervention was delivered were
enclosed. Considering the nature of the study, it is consider that
where the test administration was applied did not influence the
outcomes. (This sentence is confused) Studies where the data
measuring and preparation to assess the relationship between
creative behavior and mood disorders was applied in different
settings such as hospitals or universities were included. Only the
researchers that included a pharmacological or therapeutically co-
intervention were excluded.
Outcomes
Only psychometric tools were considered to measure the
correlation, but excluding those ones without methodological
internal consistency. Meaning that all of the tools used had to
have been previously approved and tested. For example, the text
analysis software program “Linguistic Inquiry and Word Count”
used by Forgeard (2008), has been continuously positively tested
by Pennebaker et al. (1998).
28
The definition of creativity used for each study is not an
exclusion criteria, since this paper underlines in the introduction
that there is not a general consensus about the definition of this
paradigm.
Finally, regarding the results, only studies with significant
positive or negative correlations between the independent and the
dependent variable were included.
29
INCLUSION EXCLUSION
Study Characteristics
Link between creativity and Mood Disorders.
Links between creativity and other mental illness .
Case-Control studies Crossectional studies.
Prospective cohort-studies.
Participants
Bipolar Disorder II, Cyclothymia and Major Depressive Disorder patients or I. Comorbid illness (ODD, CDD, Anxiety Disorders)
Psychotic disorder or schizophrenia patients.
All ages included X
Intervention Setting
All settings included X Intervention focused on assess the relationship between creative behavior and mood disorders
Pharmacological or therapeutically co-intervention
Outcomes
Measurement: Psychometric tools Non methodologically tested tools
All definitions about the concept of creativity
Non consider to define the concept of creativity
Significant correlations on the results between the variables
Non significant correlations on the results
30
Quality assessment
There were two types of studies used in this systematic review to
assess the correlation between creativity and bipolar. Twelve case-
controls and one cross-sectional study, all of them are observational
studies, for this reason it is particularly important to consider the
individual aspects of the designs in order to avoid possible bias.
The Centre for Reviews and Dissemination of the University of
York, described in the publication “Systematic Reviews” (2009), a
bias as a “systematic deviation from the true underlying effect
brought about by poor study design or conduct in the collection,
analysis, interpretation, publication or review of data”. Therefore,
assessing the quality of these studies was difficult due to the varied
range of data provided per analysis. A procedural research has been
carried out trying to recognize the characteristics of each paper
most connected with predispositions or prejudices. One of the main
problems was that the participants were not blinded. (They knew
they were being tested because they were creative or bipolar). The
control groups, especially the ones formed by creative controls
were another source of difficulty because they could be
“contaminated” by the stereotypes of “creative genius”. Armstrong
31
et al. (2007) provided a checklist that compiles the criteria for
assessing quality on qualitative studies. This study followed those
guidelines:
1. Method applicable to research inquiry
2. An clear link to the model
3. Distinctly specified aims and objectives
4. A well-defined explanation of setting
5. A clear description of sample
6. A clear description of research methods
7. Validation of the data analyzed
8. Inclusion of enough data to funding the explanations
32
33
All the studies followed an appropriate methodology to measure
the variables with the exception of Soeiro de Souza et al. (2011)
who used a cross-sectional methodology to measure the
correlations, losing the prospect of having a control group that
provides a deeper point of view. Forgeard et al. (2008) does not
include information regarding the diagnosis methodology that it
used to assess whether the subjects suffered from bipolar or
unipolar disorder. The main weakness of this review appears on
the description of the context used and the sample
characteristics because ten of the thirteen studies used
population non-randomly selected from the same environment.
Is worth noting that six of the studies samples were collected at
the Stanford Clinic (USA), and the other three studies used
college students. However, Richars et al. (1988),Kyaga et
al.(2011) and Soeiro de Souza et al .(2012) used a less uniform
sample. Finally, it is important to underline the descriptive
nature of these studies since they are measuring a subjective
construct such as creativity, and almost all of them manage to
choose the correct methodology to measure the creative
behavior. The exceptions being Kiaga et al.(2011) and
Nowakowska et al.(2005) that have some limitations, and
34
Fodor,Laird(2004) and Forgeard (2008) that were focused on
creative writing and probably did not have access to more
sources of data measurement.
35
RESULTS
36
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These thirteen papers were written following generally the same
purpose: To find a relationship between Mood Disorders and
creativity. However, all of them followed different inclusion and
exclusion criteria in order to select the sample and the
methodology. Specifically, two included family as an
independent variable; others added neurological and
pharmacological variables, whilst another two papers purpose
was to study the non-eminent creativity excluding other types of
creativity. Finally, two researches focused their hypothesis solely
on the creativity related to the writing process.
Richard et al. (1988) centered their research on the possibility of
a familial compensatory advantage to bipolar illness involving
creativity, and Simeonova et al. (2005) attempted to find if
children with a bipolar parent would display higher creativity
scores than healthy control children. Kyaga et al. (2011) also
includes the family variable, however, this study gave more
importance to another systemic variable: The professional
occupations of the participants. The aim of this study was to find
the occurrence of creative occupations among individuals with
schizophrenia, unipolar depression, bipolar disorder, and their
families. Soeiro de Souza et al. (2011) assessed conceivable
38
differences in creativity marks among manic, mixed, and
depressive episodes of bipolar disorder, the impact of the
executive function, and the effect on medication-free bipolar I
Patients, they therefore included the use of medication and how
the neurocognitive functioning of their patients, giving another
perspective into the problem. Following the neurocognitive
approach Soeiro de Souza et al. (2012) investigated whether there
was a neurocognitive relationship between the BDNF genotype
(Brain-derived neurotropic factor) and creativity. BDNF is the
one of the most extensive and practiced neurotropic and it is
related to the pathophysiology of Bipolar Disorder. Santosa et al.
(2007) investigated the non-eminent creativity in bipolar disorder
patients compared to healthy controlled group patients. With non-
eminent or “everyday creativity” these authors confined their
research to a more specific concept. This concept was also used
in the study of Shapiro, Weisberg (1999) when they tried to
determine if the association between bipolar disorder and
creativity would generalize to creative individuals “beyond the
circle of eminence”. The Srivastava et al. (2010) paper focused
the research on creativity related to intuitive thinking in order to
find if Bipolar Disorder is not just linked with negative and
changeable feelings but also positive skills. Rybakowski,
39
Klonowska (2011) restricted their research to the effects of an
acute affective episode (depressed or manic) and the descriptions
of how an schizotipy state influences the measurements of
creativity. Strong et al. (2007) goal was to investigate the
temperament-creativity relationships, understanding those
temperamental behaviors most strongly related to creativity.
Nowakowska et al. (2005), purpose was to examine
consistencies and variances between euthymic mood disorder
subjects, creative or healthy controls. Finally, Fodor, Laird (2004)
and Forgeard excluded in there research the creativity unrelated
to the writing process. They tried to demonstrate that persons
with a bipolar inclination would achieve the highest creativity
ratings in their writing style than healthy control group
participants.
40
41
Twelve of the articles in the review used a control group, only the
Soeiro de Souza et al. (2011) research did not employ this tool,
testing 67 individuals with Bipolar Disorder I. Regarding the size
of the sample, it is remarkable the study of Kyaga et al. (2011),
54042 patients with Schizophrenia, 29644 patients with Bipolar
Disorder and 217771 patients with Unipolar depression were
tested. The information concerning the number of siblings tested
in the control group is not provided in the research; nonetheless
the sample size is one of the strongest points of this research.
Conversely, Simeonova et al. (2005) had the smallest sample size
with who belonged to families where at least one member had
bipolar disorder, and 18 healthy control subjects.
Another interesting methodology tool is the use of Creative
Controls in the sample. This offers the perspective of seeing if
merely being creative makes you more susceptible to having a
mood disorder. Santosa et al. (2007) evaluated 49 bipolar
disorder, 25 manic-depressive disorder and 32 creative controls
comparing them to 47 healthy control subjects. Srivastava et al.
(2010) tested 32 bipolar disorder patients, 21 with a major
depressive disorder, 22 creative controls and 42 healthy controls.
Strong et al (2007) also utilized a group of 32 creative control
subjects, comparing them with 49 bipolar, 25 major depressives
42
and 47 healthy controls. Finally Nowakowska el al. (2005)
utilized as well a sample of 32 creative controls, relating them
with 49 bipolar disorder patients, 25 with major depression, and
47 healthy controls.
Finally, another interesting characteristic of the sample is the
selection criteria. Forgeard (2008) selected 30 deceased writers,
10 Unipolar, 10 Bipolar and 10 healthy. However, Fodor, Laird
(2004) randomly chose 22 living writers with an inclination
towards bipolar disorder. Therefore, both studies, despite the fact
they were focused on the same field, had completely different
sample characteristics.
43
44
All of the studies employed different psychometric tools to
diagnose the euthymic disorders in the sample. Two of the studies
concerned have accessed patient data. This is interesting
considering that each doctor would have to follow different
criteria due to their varying psychological approaches. The
weakness is that it is difficult to control that variable and we
could deal with different concepts of bipolarity, on the other hand
this diagnosis data follow test results, and referees- doctor
opinion as well, so the profile is much more complete. The study
developed by Richards et al. (1988) utilized the clinical records
gathered together by Wender et al. (1986), also adding the
Centralized Danish registers, always following the DSM IV
diagnosis group criteria. Kiaga et al. (2011) employed the
Swedish Hospital Discharge Register (National Board of Heath
and Welfare), but there was no clarification as to which
Diagnosis Criteria System the register follows. The other two
pieces of research found the patients through recognized
psychometric tools, the positive point is that the result would be
more homogeneous and the variables more controlled, however,
this meant they lost the opportunity to have a biopsicosocial view
of the person, which is how the illness functions in a family, and
45
how it affects society and also the biological system of the
individual. Soeiro de Souza et al. (2011) utilized the LICAVAL
Clinical trial, the Structured clinical interview (SCID-I/P), The
Young Mania Rating Scale, the Montgomery-Asberg Depression
Rating scale and the Clinical Global Impression. The SCID:
Structured-semi-structured clinical interview is one of the tools
more widely used, namely by Soeiro de Souza et al. (2012),
Santosa et al. (2007),Simeonova el al.(2005) and Nowakowska et
al.(2005). The SCID is a semi-structured interview to assess the
major Axis I DSM-III-R diagnoses. It contains a preliminary
overview followed by nine modules, seven of which represent the
major axis I. Using a “decision tree approach” Ref Inc. (Spitzer el
al.1992). The SCID helps the clinician examining diagnostic
theories during the dialog. The output of the SCID is a register of
the incidence of each of the disorders being considered currently
and during a period of time.
The Beck Depression Inventory is also frequently utilized.
Santosa et al. (2007), Srivastava et al. (2010), Strong et al. (2007)
and Nowakowska et al. (2005) applied it so as to determine the
appearance of a mood disorder on the subjects of the sample. As
by Ref Inc. Beck in 1961, The Beck Depression Inventory (BDI)
is a scale that measures 21 feelings or thoughts: sadness,
46
pessimism about the future, feelings of failure, lack of
satisfaction feeling of guilt, grief, hatred of self, reproachful
towards himself; suicidal Ideation; fits of tears, irritability, social
interest, indecision, body image work, sleep disturbances, fatigue,
appetite, weight loss, attention towards their health and libido.
Each category describes a specific behavioral manifestation of
depression and consists of a series of 4 to 5 states. The proposals
were ranked by degree of severity ranging from 'no symptoms' to
extremely severe. Beck (1961) in his original report on the BDI
states that the internal consistency using the split-half method
shows high reliability: the Pearson correlation between odd and
even categories reached r = 0.86. Correction with the Spearman-
Brown coefficient of 0.93 is even reached. An agreement exists
with the findings by psychiatrists in 97% of cases, with a point of
difference for the four-point scale. Finally, is important to
underline the fact that the Forgeard (2008) paper that classified
eminent deceased writers by their mood disorder, followed the
“Diagnosis of mental illness by Jamison (1993). This was
necessary due to the retrospective nature of the study. Forgeard et
al. (2008) justified this decision by explaining that the Jamison
classification was based on “documentation from different
sources.”
47
48
Each study measured the creativity term in different ways.
Subsequently, in the data analysis, Richards et al. (1988) and
Kyaga et al. (2011) did not apply an elongated battery of tests.
Kyaga et al. (2011) (researchers) employed an uncommon
methodology to investigate creative subjects. They referred to the
Nordic Classification of Occupations for Creative professions so
they determine the creativity of the subjects only under
productivity or professionally characteristics, disregarding the
“unproductive” and creative behavior, (unproductive as in
engaged in an unpaid activity or an amateur). Another problem is
that there could be creative people, especially bipolar patients that
did not feature on that list, as they perhaps lived in an inpatient
clinic and they not registered as having a particular occupation.
Richards et al. (1988) also utilized the interview as a tool to
distinguish creative people, the question is what kind of
interview, questions, and measures they have employed.
Alternatively, they use the Lifetime Creativity Scales, which is
validated, and helps to assess “everyday creativity”. Soeiro de
Souza et al. (2011) and Santosa et al. (2007) based their
investigation on a long battery of tests. Firstly, they employed the
BWAS, the Neurocognitive: WCST, the WCST-CONC, the
WCST-PR, the WCST-FMS, the WCST-CC, the WCST-E, the
49
WCST-NP, the WCST-P and the Intelligence Scale: WASI.
Santosa et al. (2007) also utilized the Barron-Welsh Art Scale
(BWAS) , annexing the Adjective Check list Creative Personality
Scale (ACL-CPS), and the Torrance Test of Creative Thinking on
Figural (TTCT-F) and verbal versions (TTCT-V).
It is important to underline The Barron-Welsh Art Scale (BWAS)
utilization, owing to the fact that it is used in several studies of
this systematic review with the exception of the two named
above. Srivastava et al (2010), Soeiro de Souza et al. (2012),
Strong et al. (2007), and the Simeonova et al. (2005) papers also
employed this method. Santosa et al. (2007) described the Barron
–Welsh Art Scale (BWAS) as an empirically derived metric
created by Barron in 1963, formed by 86 black or white images
that the subject could rate as like or dislike. Higher scores are
given for the subjects that show preference for asymmetrical and
complex images. Generally creative people choose those figures
more frequently. BWAS involves not only visual processing of
the images, it also involves an affective process that appears
when the subject expresses there like or dislike of the images.
The second most frequently employed instrument is the ACL-
CPS scale. It is utilized in Srivastava et al. (2010),Santosa et
al.(2007),Strong et al.(2007), and finally the Shapiro and
50
Weissberg (1999) papers. Santosa et al. (2007) described it as a
derivation of the Adjective Checklist created by Gough in 1979.
This scale reflects any supposed personality constituent of
creativeness. The participants have to designate adjectives
recognized by experimental studies to distinct groups of creative
and non-creative individuals. Some of the adjectives like
ingenious, hilarious, inventive, and original, are frequently
ascribed to creative people, while others like conservative,
commonplace, honest, or submissive are rarely linked with
creative people. Rybakowski and Klonowska (2011) used two
uncommon tests, the Revised Art Scale (RAS) and the Berlin
Intelligence Structured Test (BIS). The first one measures
creativity from a psychoanalytic perspective, and it assumes,
similar to the BWAS scale that creative people have preferences
for irregular and complex figures. The BIS however, define
creativity as a subcomponent of intelligence. Finally, is important
to point out that the Fodor, Laird (2004) and Forgeard (2008)
papers utilized completely different measures for their studies.
The reason being that they focused their papers solely on the
creativity linked with the activity of writing. Fodor and Laird
(2004) used Play Therapy to interpret Children´s Stories and
compose Haiku Style poems. The use of Haikus is an interesting
51
tactic since Blasko and Merski in 2010 stated that the unity of
simplicity of form and profundity of connotation makes the haiku
a perfect subject for the interdisciplinary analysis of creativeness.
52
53
Main findings
This review will analyze outputs following a criteria based on an
independent variable, which means that firstly the results
concerning to correlations between creativity and a mood
disorder (including the creative controls) will be analyzed and
secondly, the correlations between creativity and temperament
features. Finally, a more in-depth analysis of the correlation
between creativity and the bipolar stages: manic or depressive.
Only the positive or negative correlations represented by a
significant statistic result will be considered. There is a strong
positive correlation between having a Bipolar Disorder and being
creative. Santosa et al. (2007) found that Bipolar patients, had a
45% higher mean BWAS-Total score than the healthy control
group, but no more than the creative people control group and
similar to scores previously observed in architects (29.4 ± 10.6)
and creative writers (32.9 ± 11.1) It is realistic that
temperamental/ character variances could contribute to
heightened creativity in Bipolar disorder, with medication, and a
history of drug misuse also influencing it. Santosa et al. (2007)
encouraged further investigation concerning this point and
54
stressed the necessity for more studies regarding age differences.
Srivastava et al. (2010) presented BWAS- total scores
significantly higher compared to HC patients in BP and in CC
patients. The same happened with the BWAS-dislike scores.
TEMPS-A-Ciclothymia/NEO-Neuroticism scores were
significantly upper in BP, MDD and CC. Myers-Brigg Type
Inventory: MBTI-Intuition: Had significantly upper scores with
the BD group compared to MDD, CC and HC. The authors
suggested that Affective (NEO-Neuroticism and TEMPS-A-
Cyclothymia) and cognitive (NEO-Openness and MBTI-
Intuition) factors contributed to components of the creativity
measured by the BWAS-Dislike and the BWAS-Like.
Rybakowski and Knlonowska in 2011 discovered that in the BIS:
Berlin Intelligence Structure Test scores, BP subjects had
significantly better results compared to HC on the total creativity
BIS scale, and especially in the section related to verbal
creativity. Simeonova et al. (2005) in their paper concerning the
sample size of patients with bipolar disorder, showed that 100%
had a comorbid illness such a ADHD, Oppositant defiant
disorder, and Conduct Disorder…Regarding the results in
creativity, parents on the BWAS Dislike subscale scores graded
significantly higher than the control group. Children related to
55
patients with mood disorders, that also suffered BD or ADHD
themselves, had high punctuations particularly on the BWAS
Dislike subscales compared to the control group. Elevated/great
punctuations on the BWAS Dislike subscale indicate that patients
dislike simple and symmetrical figures). This shows that bipolar
descendants with psychopathology may have more eminent
creativity than healthy control children. Limitations to this study
included the small simple size, and the use of BWAS as the only
assessment test, where only one aspect of creativity is measured.
Furthermore, it is still not validated on children so some of the
results may not be reliable. Finally, bipolar descendants might be
more creative due to the family environment, being influenced by
their parents’ projects and views. Nowakowska et al. (2005)
presented that patients with mood disorders and creative controls
punctuated higher on Cyclothymic, Irritability and Dysthymia
than the healthy control subjects on the TEMPS-A Scores:
Measure of Cyclothymia /Irritability/Dysthymia/ Hyperthymia.
Surprisingly on irritability, Creative Controls did not grade
significantly higher than bipolar and depressive disorder patients.
The most significant percentage is the one that showed that
Bipolar Disorder patients had significantly more cyclothymic
symptoms than the others (Major depressive disorder, creative
56
and healthy controls). Neuroticism had a similarly high grade in
BP, MDD, and CC compared to HC. In contrast,
conscientiousness was decreased for MDD, BD and CC again
compared to HC on the NEO-PI-R:
Neuroticism/Conscientiousness/openness. Finally, openness had
significantly elevated scores for BD than for CC, and CC
obtained significantly higher scores than HC and MDD. On the
TCI there was significant group differences for harm avoidance,
self-directedness, novelty seeking and self-transcendence.
Particularly BP, MDD and CC scored much higher than the HC
group on harm avoidance and novelty seeking punctuations.
These three groups a significantly lower grade that was almost
identical on self-directedness compared to HC. Only for self-
transcendence did BP score higher than the other groups. Fodor
and Laird (2004) showed participants with a bipolar inclination
who received exposure to the play therapy procedure were the
group who subsequently exhibited the highest levels of literary
creativity. DB patients achieved higher creativity scores in their
writing of haiku –style poems than CC, and they also achieved
insignificantly higher scores interpreting children’s stories. Manic
patients produced highly creative poems. Finally, only Forgeard
(2008) did not support a positive correlation between creativity
57
and mood disorders, in his first study 30 works were analysed
using Pennebakes et al. (2011) Linguistic Inquiry and Word
Count, 74 lexical groups referring to sensitive, intellectual,
bodily, and societal processes were considered. Comparing
bipolar, unipolar and control writers, non-significant differences
between unipolar, bipolar and healthy writers uses of words
connected to emotions during creative process were found. In his
second study again employing Pennebaker et al. Linguistic
Inquiry and Word Count (2001), he showed that the kind of mood
disorder (unipolar or bipolar) that a writer suffers is related with
some linguistic characteristics. Writers with unipolar depression
explicit more interest in others intellectual processes, while
writers with bipolar disorder use more lyrics related to mortality.
However, those results were not directly related to creativity. In
Kiaga et al. (2011) research indicated the number of individuals
with bipolar disorder significantly increased in creative
professions, especially in visual artistic professions. The
difference is well defined if compared with the control group.
The first-degree relatives were also revealed as having more
creative occupations, for example, scientific or creative
professions.
58
Regarding temperament features related to creativity, Soeiro de
Souza et al. (2011) research results were divided between three
groups formed by twenty patients experiencing manic episodes,
twenty-one mixed states and twenty-six depressive episodes.
Concerning neurocognitive functions and executive function
scores, as rated by the WCST; the manic group had higher scores
than the mixed group in the neurocognitive tests. The final scores
on the BWAS test were more elevated in the mania group than in
the mixed or depression episode groups, however, IQ scores did
not differ between them. Kiaga et al. (2011) found that IQ (only
in males) was commonly superior in people with creative
occupations, but lower in those persons with bipolar disorder and
respective siblings, always comparing them with people without
any diagnosis. Mood changes and cognitive functions only affect
the BWAS scores of the mania group. Richards et al. (1988)
found the highest correlation among creativity and Bipolar
Disorder on cyclothymic patients than in manic-depressives and
their relatives. Indeed, the level of creativity was higher in manic-
depressives, cyclothymic, and normal first-degree relatives
combined, but cyclothymiacs had a stronger correspondence.
Richard et al. (1988) added information about vocational peak
creativity (arts, sciences, humanities and social sciences),
59
showing that cyclothymic people punctuated significantly higher
creativity than the other two index groups. Rybakowski and
Klonowska (2011) study results presented non-relevant effects of
a manic episode on creativity, however, depression had a
detrimental effect on the creativity measured by the BIS scale.
(Depression-creative block) Schizotipy symptoms correlated with
RAS-like, RAS-dislike, and RAS-total. Shapiro and Weisberg
(1999) results were about the “continuous affective patterns”,
Creativity scores measured by the ACL-CPS, are higher when
hypomania-plus-biphasic scores are high and depression scores
low. With regards to the “criteria affective patterns” individuals
displaying a hyperthymic pattern measured significantly higher
on ACL-CPS creativity scores than those at risk for either
cyclothymic or depression. In conclusion, Shapiro and Weisberg
(1999) study gave insignificantly different ACL-CPS creativity
scores for individuals meeting GBI criteria for hyperthimic from
those least symptomatic, or euthymic individuals. (Those results
differ from the results obtained by Richards (1988). Finally,
Strong et al. (2007) measuring the temperament –creativity
relationship found that BWAS-Total scores correlated
significantly with the Neuroticism / Cyclothymia /Dysthymia
Factor. BWAS-Dislike scores also correlated significantly with
60
the Neuroticism /Cyclothymia /Dysthymia Factor. Specifically
correlated with NEO-PI-R-Neuroticism and TEMPS-A
Cyclothymia. Finally, openness correlated significantly with
BWAS-like and ACL-CPS.
61
DISCUSSION
This review found answers for the objectives previously fixed.
The results suggested that bipolar disease is linked to creativity,
and that this relationship is related to a hyperthymic affective
pattern. (Shapiro, Weisberg1999). This means that there is a peak
of creative behavior in bipolar patients compared to healthy
control participants. However, this positive correlation is almost
the same for creative control participants. (Santosa et al.2007).
This relationship is especially strong in the inventiveness part of
the test, particularly in the verbal domain. (Rybakowski,
Klonowska 2011). For instance, Fodor, Laird (2004), found that
Barnes´s (1996) play therapy technique could intensify literacy
creativity in bipolar patients, therefore a person with a bipolar
predisposition who had a significantly enhanced temperament
practicing play therapy, wrote more creative poems. However,
not all the papers reached the same conclusion; creativity is
stronger in subjects that have sub-clinical expressions of
bipolarity (for instance, cyclothymes), compared to the subjects
suffering more severe manifestations of the illness like manic-
depressives. (Richards et al.1988). Other results showed a
significant impairment of creativity performance during
depressive states, the degree of this impairment directly
62
correlated to the severity of the depression, especially those
“active” aspects of creativity that were the ones more affected by
a “creative block” (Rybakowski, Klonowska 2011). Conversely,
one paper´s results revealed no differences between unipolar and
bipolar writers when using emotional words, consequently, there
may not be any differences in emotional states between writers
with a mood disorder and healthy writers during the creative
process. (Forgeard 2008). So, even though the relationship
between creativity and bipolar disorder appeared clearly, there
are still some gaps in our knowledge that remain unresolved.
There is clearly a necessity to investigate exactly which phases of
the disorder increase creative behavior, and which impairs it.
Regarding the genetic bases of this relationship, this review
showed that bipolar descendants have higher creativity than
healthy control offspring. (See Simeonova et al. 2005). That
relationship also affects the tendencies of choosing a creative
occupation, bipolar disorder patients and their relatives used to
choose more creative occupations than subjects from the healthy
control group and their relatives. On the contrary, individuals
with a major depressive disorder and their relatives did not show
any consistent pattern of association with creative occupations.
(Kyaga et al. 2011)
63
Studying the relationship between bipolar disorder and creativity
in depth we can see there are some temperamental features that
specifically influenced the development of creativity. Once again
there is a difference between bipolarity and other mood disorders,
(Santosa et al. 2007) underlined that those personality differences
are constrained to the bipolar disorder, and do not appear in a
major depressive disorder. Concretely the personality differences
that this review has found were temperamental-affective
variances such as neuroticism, cyclothymia and dysthymia, and
temperamental- cognitive variances for example, openness and
intuition. This means that these components contribute
significantly in increasing the features of creativity. (Srivastava et
al 2010), (Strong et al. (2007). The first mentioned (neuroticism,
cyclothymia and dysthymia) could provide access to the
changeability of the affects, and the others (openness and
intuition) to flexibility. Differences among different mood bipolar
states were also reported; manic patients were found to have
greater creativity results on the psychometric tools, especially on
the task related to executive functions (Soeiro de Souza et al.
(2011).
Another important link found between creative behavior and
bipolar disease is the neurological one. The overlap between
64
bipolar disorder subject results and creative control subject results
on the measure of tools of creativity suggest that there could be
some neurobiological commonalities between people suffering
bipolarity and individuals that exhibited creative behavior.
(Nowakowska et al. (2005). Furthermore, this review showed that
the proBDNF (Met-) monoaminergic is linked with a better
performance on creative task in individuals suffering bipolar
disorder, but only during the manic phase. (Soeiro de Souza et al.
(2012)
There are clearly some limitations of this review. Firstly, we can
see there are a multitude of approaches to assess the definition of
creativity, and the majority of them generally have restrained
correlations. The general use of artistic and scientific
occupations, or specific behaviors defined by the test, as a
representation for creativity is clearly a limitation. Secondly, the
databases used for this research were restricted to the ones linked
to the catalogues of the Queen Mary Library, the British Library
and the Senate House Library, being necessary for future research
add other sources, and also include studies written in other
languages since due to the personal characteristics of the
investigator this study in limited to English written papers.
Thirdly, only case-control studies were included it being
65
necessary to compare groups from the same population (creative
people, members of the same family) with and without a mental
disorder, therefore there was a risk of “over-matching” when the
groups were made to make them comparable for possible
cofounding features, therefore, further research including
randomized controlled trials is necessary. Fourthly, the sample
characteristics created very important limitations. For instance
some of the participants were college students, and they have
been included even the age was not specified, and due to their
characteristics the investigation was restricted to a highly-
educated sample. Other studies included a mixture of un-
medicated and medicated patients in the same sample, which
created some uncontrolled bias. Ten of the thirteen studies used
population non-randomly selected from the same environment.
Another of the sample problems was the difficulty presented by
the fact that the participants were not blinded. (They knew they
were tested because they were creative or bipolar). The control
groups, especially the ones formed by creative control
participants were another source of difficulty because they could
be “contaminated” by the stereotypes of “creative genius”, this
means that the idea of a “genius” has created an image about how
a creative person should be, and during the test many participants
66
could exaggerate their behaviour patterns according to that idea.
Steve Allen called that “the Bohemian excuse” (Allen, 1998). In
The Mad Genius Controversy, the sociologist George Becker
(1978) notes that: “The aura of madness served the function of
differentiating genius from the mean, the mediocre, or the
bourgeois . . . the man of genius could claim some of the powers
and privileges granted the ‘fool’ and the ‘possessed’ prophet”.
Finally, the majority of the papers used the BWAS, as an
assessment tool to measure creativity and this is a restraint since
the kind of exact creativity notions underlying the BWAS
remains to be recognized. Due to the instruments nonverbal
measures and its perceptual tendency, it could be viewed as a
measure that assesses only one aspect of creativity.
Considering that a systematic review should help researchers to
avoid possible drawbacks or difficulties and refine their
objectives and research questions, there are some important
future recommendations that would allow the generalization to
have a more realistic context. (Mulrow, 1994). Clearly future
studies are needed to clarify the correlation between mania and
creativity in Bipolar Disorder; exploratory analysis using multiple
tests replicating these results was necessary. Further studies are
needed to determine what increases creativity and how these
67
mechanisms are related to temperament, mood, and medication
status. It would also be important to distinguish genotype-
environment exchanges that stimulate creativity, the descendants
and relatives of subjects suffering any mood disorder, could be
influenced by family atmosphere, parents aesthetic opinions and
artistic endeavours. (Simeonova et al. 2005). Finally, more
longitudinal studies should be conducted to observe if creativity
would continue in the participants who attended therapy for a
sustained period of time.
68
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