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William McDougall, writing in 1932, put forward a conjecture observing that "five distinguishable but separable factors" could be identified when looking at personality. His suggestions, "intellect, character, temperament, disposition and temper", have been seen as "anticipating" the adoption of the Big Five model in subsequent years.⁶ The model was built on understanding the relationship between personality and academic behaviour.⁷ It was defined by several independent sets of researchers who analysed words describing people's behaviour.⁸ These researchers first studied relationships between many words related to personality traits. They made lists of these words shorter by 5–10 times and then used factor analysis to group the remaining traits (with data mostly based upon people's estimations, in self-report questionnaires and peer ratings) to find the basic factors of personality.^910111213

The initial model was advanced in 1958 by Ernest Tupes and Raymond Christal, research psychologists at the Lackland Air Force Base in Texas, but failed to reach scholars and scientists until the 1980s. In 1990, J.M. Digman advanced his five-factor model of personality, which Lewis Goldberg put at the highest organised level.¹⁴ These five overarching domains have been found to contain most known personality traits and are assumed to represent the basic structure behind them all.¹⁵

At least four sets of researchers have worked independently for decades to reflect personality traits in language and have mainly identified the same five factors: Tupes and Christal were first, followed by Goldberg at the Oregon Research Institute,^1617181920 Cattell at the University of Illinois,^21222324 and finally Costa and McCrae.^25262728 These four sets of researchers used somewhat different methods in finding the five traits, making the sets of five factors have varying names and meanings. However, all have been found to be strongly correlated with their corresponding factors.^2930313233 Studies indicate that the Big Five traits are not nearly as powerful in predicting and explaining actual behaviour as the more numerous facets or primary traits.³⁴³⁵

Each of the Big Five personality traits contains two separate, but correlated, aspects reflecting a level of personality below the broad domains but above the many facet scales also making up part of the Big Five.³⁶ The aspects are labelled as follows: Volatility and Withdrawal for Neuroticism; Enthusiasm and Assertiveness for Extraversion; Intellect and Openness for Openness to Experience; Industriousness and Orderliness for Conscientiousness; and Compassion and Politeness for Agreeableness.³⁷

Finding the five factors

In 1884, British scientist Sir Francis Galton became the first person known to consider deriving a comprehensive taxonomy of human personality traits by sampling language.³⁸ The idea that this may be possible is known as the lexical hypothesis. In 1936, American psychologists Gordon Allport of Harvard University and Henry Odbert of Dartmouth College implemented Galton's hypothesis. They organised for three anonymous people to categorise adjectives from Webster's New International Dictionary and a list of common slang words. The result was a list of 4504 adjectives they believed were descriptive of observable and relatively permanent traits.³⁹

In 1943, Raymond Cattell of Harvard University took Allport and Odbert's list and reduced this to a list of roughly 160 terms by eliminating words with very similar meanings. To these, he added terms from 22 other psychological categories, and additional "interest" and "abilities" terms. This resulted in a list of 171 traits. From this he used factor analysis to derive 60 "personality clusters or syndromes" and an additional 7 minor clusters.⁴⁰ Cattell then narrowed this down to 35 terms, and later added a 36th factor in the form of an IQ measure. Through factor analysis from 1945 to 1948, he created 11 or 12 factor solutions.⁴¹⁴²⁴³

In 1947, Hans Eysenck of University College London published his book Dimensions of Personality. He posited that the two most important personality dimensions were "Extraversion" and "Neuroticism", a term that he coined.⁴⁴

In July 1949, Donald Fiske of the University of Chicago used 22 terms either adapted from Cattell's 1947 study, and through surveys of male university students and statistics derived five factors: "Social Adaptability", "Emotional Control", "Conformity", "Inquiring Intellect", and "Confident Self-expression".⁴⁵ In the same year, Cattell, with Maurice Tatsuoka and Herbert Eber, found 4 additional factors, which they believed consisted of information that could only be provided through self-rating. With this understanding, they created the sixteen factor 16PF Questionnaire.^4647484950

In 1953, John W French of Educational Testing Service published an extensive meta-analysis of personality trait factor studies.⁵¹

In 1957, Ernest Tupes of the United States Air Force undertook a personality trait study of US Air Force officers. Each was rated by their peers using Cattell's 35 terms (or in some cases, the 30 most reliable terms).⁵²⁵³ In 1958, Tupes and Raymond Christal began a US Air Force study by taking 37 personality factors and other data found in Cattell's 1947 paper, Fiske's 1949 paper, and Tupes' 1957 paper.⁵⁴ Through statistical analysis, they derived five factors they labeled "Surgency", "Agreeableness", "Dependability", "Emotional Stability", and "Culture".⁵⁵⁵⁶ In addition to the influence of Cattell and Fiske's work, they strongly noted the influence of French's 1953 study.⁵⁷ Tupes and Christal further tested and explained their 1958 work in a 1961 paper.⁵⁸⁵⁹

Warren Norman⁶⁰ of the University of Michigan replicated Tupes and Christal's work in 1963. He relabeled "Surgency" as "Extroversion or Surgency", and "Dependability" as "Conscientiousness". He also found four subordinate scales for each factor.⁶¹ Norman's paper was much more read than Tupes and Christal's papers had been. Norman's later Oregon Research Institute colleague Lewis Goldberg continued this work.⁶²

In the 4th edition of the 16PF Questionnaire released in 1968, 5 "global factors" derived from the 16 factors were identified: "Extraversion", "Independence", "Anxiety", "Self-control" and "Tough-mindedness".⁶³ 16PF advocates have since called these "the original Big 5".⁶⁴

Hiatus in research

During the 1970s, the changing zeitgeist made publication of personality research difficult. In his 1968 book Personality and Assessment, Walter Mischel asserted that personality instruments could not predict behavior with a correlation of more than 0.3. Social psychologists like Mischel argued that attitudes and behavior were not stable, but varied with the situation. Predicting behavior from personality instruments was claimed to be impossible.[]

Renewed attention

In 1978, Paul Costa and Robert McCrae of the National Institutes of Health published a book chapter describing their Neuroticism-Extroversion-Openness (NEO) model. The model was based on the three factors in its name.⁶⁵ They used Eysenck's concept of "Extroversion" rather than Carl Jung's.⁶⁶ Each factor had six facets. The authors expanded their explanation of the model in subsequent papers.

Also in 1978, British psychologist Peter Saville of Brunel University applied statistical analysis to 16PF results, and determined that the model could be reduced to five factors, "Anxiety", "Extraversion", "Warmth", "Imagination" and "Conscientiousness".⁶⁷

At a 1980 symposium in Honolulu, Lewis Goldberg, Naomi Takemoto-Chock, Andrew Comrey, and John M. Digman, reviewed the available personality instruments of the day.⁶⁸ In 1981, Digman and Takemoto-Chock of the University of Hawaii reanalysed data from Cattell, Tupes, Norman, Fiske and Digman. They re-affirmed the validity of the five factors, naming them "Friendly Compliance vs. Hostile Non-compliance", "Extraversion vs. Introversion", "Ego Strength vs. Emotional Disorganization", "Will to Achieve" and "Intellect". They also found weak evidence for the existence of a sixth factor, "Culture".⁶⁹

Peter Saville and his team included the five-factor "Pentagon" model as part of the Occupational Personality Questionnaires (OPQ) in 1984. This was the first commercially available Big Five test.⁷⁰ Its factors are "Extroversion", "Vigorous", "Methodical", "Emotional Stability", and "Abstract".⁷¹

This was closely followed by another commercial test, the NEO PI three-factor personality inventory, published by Costa and McCrae in 1985. It used the three NEO factors. The methodology employed in constructing the NEO instruments has since been subject to critical scrutiny.⁷²: 431–33 

Emerging methodologies increasingly confirmed personality theories during the 1980s. Though generally failing to predict single instances of behavior, researchers found that they could predict patterns of behavior by aggregating large numbers of observations.⁷³ As a result, correlations between personality and behavior increased substantially, and it became clear that "personality" did in fact exist.⁷⁴

In 1992, the NEO PI evolved into the NEO PI-R, adding the factors "Agreeableness" and "Conscientiousness",⁷⁵ and becoming a Big Five instrument. This set the names for the factors that are now most commonly used. The NEO maintainers call their model the "Five Factor Model" (FFM). Each NEO personality dimension has six subordinate facets.

Subsequent developments

Wim Hofstee at the University of Groningen used a lexical hypothesis approach with the Dutch language to develop what became the International Personality Item Pool in the 1990s. Further development in Germany and the United States saw the pool based on three languages. Its questions and results have been mapped to various Big Five personality typing models.⁷⁶⁷⁷

Kibeom Lee and Michael Ashton released a book describing their HEXACO model in 2004.⁷⁸ It adds a sixth factor, "Honesty-Humility" to the five (which it calls "Emotionality", "Extraversion", "Agreeableness", "Conscientiousness", and "Openness to Experience"). Each of these factors has four facets.

In 2007, Colin DeYoung, Lena C. Quilty and Jordan Peterson concluded that the 10 aspects of the Big Five may have distinct biological substrates.⁷⁹ This was derived through factor analyses of two data samples with the International Personality Item Pool, followed by cross-correlation with scores derived from 10 genetic factors identified as underlying the shared variance among the Revised NEO Personality Inventory facets.⁸⁰

By 2009, personality and social psychologists generally agreed that both personal and situational variables are needed to account for human behavior.⁸¹

A FFM-associated test was used by Cambridge Analytica, and was part of the "psychographic profiling"⁸² controversy during the 2016 US presidential election.⁸³⁸⁴

Descriptions of the particular personality traits

When factor analysis is applied to personality survey data, semantic associations between aspects of personality and specific terms are often applied to the same person. For example, someone described as conscientious is more likely to be described as "always prepared" rather than "messy". These associations suggest five broad dimensions used in common language to describe the human personality, temperament, and psyche.⁸⁵⁸⁶

Beneath each proposed global factor, there are a number of correlated and more specific primary factors. For example, extraversion is typically associated with qualities such as gregariousness, assertiveness, excitement-seeking, warmth, activity, and positive emotions.⁸⁷ These traits are not black and white; each one is treated as a spectrum.⁸⁸

Openness to experience

Openness to experience is a general appreciation for art, emotion, adventure, unusual ideas, imagination, curiosity, and variety of experience. People who are open to experience are intellectually curious, open to emotion, sensitive to beauty, and willing to try new things. They tend to be, when compared to closed people, more creative and more aware of their feelings. They are also more likely to hold unconventional beliefs. Open people can be perceived as unpredictable or lacking focus, and more likely to engage in risky behaviour or drug-taking.⁸⁹ Moreover, individuals with high openness are said to pursue self-actualisation specifically by seeking out intense, euphoric experiences. Conversely, those with low openness want to be fulfilled by persevering and are characterised as pragmatic and data-driven – sometimes even perceived to be dogmatic and closed-minded. Some disagreement remains about how to interpret and contextualise the openness factor as there is a lack of biological support for this particular trait. Openness has not shown a significant association with any brain regions as opposed to the other four traits which did when using brain imaging to detect changes in volume associated with each trait.⁹⁰

Sample items

• I have a rich vocabulary.
• I have a vivid imagination.
• I have excellent ideas.
• I am quick to understand things.
• I use difficult words.
• I spend time reflecting on things.
• I am full of ideas.
• I cherish imaginations
• I have difficulty understanding abstract ideas. (Reversed)
• I am not interested in abstract ideas. (Reversed)
• I do not have a good imagination. (Reversed)⁹¹

Conscientiousness

Conscientiousness is a tendency to be self-disciplined, act dutifully, and strive for achievement against measures or outside expectations. It is related to people's level of impulse control, regulation, and direction. High conscientiousness is often perceived as being stubborn and focused. Low conscientiousness is associated with flexibility and spontaneity, but can also appear as sloppiness and lack of reliability.⁹² High conscientiousness indicates a preference for planned rather than spontaneous behaviour.⁹³

Sample items

• I am always prepared.
• I pay attention to details.
• I get chores done right away.
• I follow a schedule.
• I am exacting in my work.
• I do not like order. (Reversed)
• I leave my belongings around. (Reversed)
• I make a mess of things. (Reversed)
• I often forget to put things back in their proper place. (Reversed)
• I shirk my duties. (Reversed)⁹⁴

Extraversion

Extraversion is characterised by breadth of activities (as opposed to depth), surgency from external activities/situations, and energy creation from external means.⁹⁵ The trait is marked by pronounced engagement with the external world. Extraverts enjoy interacting with people, and are often perceived as energetic. They tend to be enthusiastic and action-oriented. They possess high group visibility, like to talk, and assert themselves. Extraverts may appear more dominant in social settings, as opposed to introverts in that setting.⁹⁶

Introverts have lower social engagement and energy levels than extraverts. They tend to seem quiet, low-key, deliberate, and less involved in the social world. Their lack of social involvement should not be interpreted as shyness or depression, but as greater independence of their social world than extraverts. Introverts need less stimulation and more time alone than extraverts. This does not mean that they are unfriendly or antisocial; rather, they are aloof and reserved in social situations.⁹⁷

Generally, people are a combination of extraversion and introversion, with personality psychologist Hans Eysenck suggesting a model by which differences in their brains produce these traits.⁹⁸: 106 

Sample items

• I am the life of the party.
• I feel comfortable around people.
• I start conversations.
• I talk to a lot of different people at parties.
• I do not mind being the center of attention.
• I do not talk a lot. (Reversed)
• I keep in the background. (Reversed)
• I have little to say. (Reversed)
• I do not like to draw attention to myself. (Reversed)
• I am quiet around strangers. (Reversed)⁹⁹

Agreeableness

Agreeableness is the general concern for social harmony. Agreeable individuals value getting along with others. They are generally considerate, kind, generous, trusting and trustworthy, helpful, and willing to compromise their interests with others.¹⁰⁰ Agreeable people also have an optimistic view of human nature. Being agreeable helps us cope with stress.¹⁰¹

Disagreeable individuals place self-interest above getting along with others. They are generally unconcerned with others' well-being and are less likely to extend themselves for other people. Sometimes their skepticism about others' motives causes them to be suspicious, unfriendly, and uncooperative.¹⁰² Disagreeable people are often competitive or challenging, which can be seen as argumentative or untrustworthy.¹⁰³

Because agreeableness is a social trait, research has shown that one's agreeableness positively correlates with the quality of relationships with one's team members. Agreeableness also positively predicts transformational leadership skills. In a study conducted among 169 participants in leadership positions in a variety of professions, individuals were asked to take a personality test and be directly evaluated by supervised subordinates. Very agreeable leaders were more likely to be considered transformational rather than transactional. Although the relationship was not strong (r=0.32, β=0.28, p<0.01), it was the strongest of the Big Five traits. However, the same study could not predict leadership effectiveness as evaluated by the leader's direct supervisor.¹⁰⁴

Conversely, agreeableness has been found to be negatively related to transactional leadership in the military. A study of Asian military units showed that agreeable people are more likely to be poor transactional leaders.¹⁰⁵ Therefore, with further research, organisations may be able to determine an individual's potential for performance based on their personality traits. For instance,¹⁰⁶ in their journal article "Which Personality Attributes Are Most Important in the Workplace?" Paul Sackett and Philip Walmsley claim that conscientiousness and agreeableness are "important to success across many different jobs."

Sample items

• I am interested in people.
• I sympathise with others' feelings.
• I have a soft heart.
• I take time out for others.
• I feel others' emotions.
• I make people feel at ease.
• I am not really interested in others. (Reversed)
• I insult people. (Reversed)
• I am not interested in other people's problems. (Reversed)
• I feel little concern for others. (Reversed)¹⁰⁷

Neuroticism

Neuroticism is the tendency to have strong negative emotions, such as anger, anxiety, or depression.¹⁰⁸ It is sometimes called emotional instability, or is reversed and referred to as emotional stability. According to Hans Eysenck's (1967) theory of personality, neuroticism is associated with low tolerance for stress or a strong dislike of change.¹⁰⁹ Neuroticism is a classic temperament trait that has been studied in temperament research for decades, even before it was adapted by the Five Factor Model.¹¹⁰ Neurotic people are emotionally reactive and vulnerable to stress. They are more likely to interpret ordinary situations as threatening. They can perceive minor frustrations as hopelessly difficult. Their negative emotional reactions tend to stay for unusually long periods of time, which means they are often in a bad mood. For instance, neuroticism is connected to pessimism toward work, to certainty that work hinders personal relationships, and to higher levels of anxiety from the pressures at work.¹¹¹ Furthermore, neurotic people may display more skin-conductance reactivity than calm and composed people.¹¹²¹¹³ These problems in emotional regulation can make a neurotic person think less clearly, make worse decisions, and cope less effectively with stress. Being disappointed with one's life achievements can make one more neurotic and increase one's chances of falling into clinical depression. Moreover, neurotic individuals tend to experience more negative life events,¹¹⁴¹¹⁵ but neuroticism also changes in response to positive and negative life experiences.¹¹⁶¹¹⁷ Also, neurotic people tend to have worse psychological well-being.¹¹⁸

At the other end of the scale, less neurotic individuals are less easily upset and are less emotionally reactive. They tend to be calm, emotionally stable, and free from persistent negative feelings. Freedom from negative feelings does not mean that low scorers experience a lot of positive feelings; that is related to extraversion instead.¹¹⁹

Neuroticism is similar but not identical to being neurotic in the Freudian sense (i.e., neurosis). Some psychologists[] prefer to call neuroticism by the term emotional instability to differentiate it from the term neurotic in a career test.

Sample items

• I get stressed out easily.
• I worry about things.
• I am easily disturbed.
• I get upset easily.
• I change my mood a lot.
• I have frequent mood swings.
• I get irritated easily.
• I often feel blue.
• I am relaxed most of the time. (Reversed)
• I seldom feel blue. (Reversed)¹²⁰

Biological and developmental factors

The factors that influence a personality are called the determinants of personality. These factors determine the traits which a person develops in the course of development from a child.

Temperament and personality

There are debates between temperament researchers and personality researchers as to whether or not biologically based differences define a concept of temperament or a part of personality. The presence of such differences in pre-cultural individuals (such as animals or young infants) suggests that they belong to temperament since personality is a socio-cultural concept. For this reason developmental psychologists generally interpret individual differences in children as an expression of temperament rather than personality.¹²¹ Some researchers argue that temperaments and personality traits are age-specific demonstrations of virtually the same internal qualities.¹²²¹²³ Some believe that early childhood temperaments may become adolescent and adult personality traits as individuals' basic genetic characteristics interact with their changing environments to various degrees.^124125126

Researchers of adult temperament point out that, similarly to sex, age, and mental illness, temperament is based on biochemical systems whereas personality is a product of socialisation of an individual possessing these four types of features. Temperament interacts with socio-cultural factors, but, similar to sex and age, still cannot be controlled or easily changed by these factors.^127128129130 Therefore, it is suggested that temperament (neurochemically based individual differences) should be kept as an independent concept for further studies and not be confused with personality (culturally-based individual differences, reflected in the origin of the word "persona" (Lat) as a "social mask").¹³¹¹³²

Moreover, temperament refers to dynamic features of behaviour (energetic, tempo, sensitivity, and emotionality-related), whereas personality is to be considered a psycho-social construct comprising the content characteristics of human behaviour (such as values, attitudes, habits, preferences, personal history, self-image).^133134135 Temperament researchers point out that the lack of attention to surviving temperament research by the creators of the Big Five model led to an overlap between its dimensions and dimensions described in multiple temperament models much earlier. For example, neuroticism reflects the traditional temperament dimension of emotionality studied by Jerome Kagan's group since the '60s. Extraversion was also first introduced as a temperament type by Jung from the '20s.¹³⁶¹³⁷

Heritability

A 1996 behavioural genetics study of twins suggested that heritability (the degree of variation in a trait within a population that is due to genetic variation in that population) and environmental factors both influence all five factors to the same degree.¹³⁸ Among four twin studies examined in 2003, the mean percentage for heritability was calculated for each personality and it was concluded that heritability influenced the five factors broadly. The self-report measures were as follows: openness to experience was estimated to have a 57% genetic influence, extraversion 54%, conscientiousness 49%, neuroticism 48%, and agreeableness 42%.¹³⁹

Non-humans

The Big Five personality traits have been assessed in some non-human species but methodology is debatable. In one series of studies, human ratings of chimpanzees using the Hominoid Personality Questionnaire, revealed factors of extraversion, conscientiousness and agreeableness– as well as an additional factor of dominance–across hundreds of chimpanzees in zoological parks, a large naturalistic sanctuary, and a research laboratory. Neuroticism and openness factors were found in an original zoo sample, but were not replicated in a new zoo sample or in other settings (perhaps reflecting the design of the CPQ).¹⁴⁰ A study review found that markers for the three dimensions extraversion, neuroticism, and agreeableness were found most consistently across different species, followed by openness; only chimpanzees showed markers for conscientious behavior.¹⁴¹

A study completed in 2020 concluded that dolphins have some similar personality traits to humans. Both are large brained intelligent animals but have evolved separately for millions of years.¹⁴²

Development during childhood and adolescence

Research on the Big Five, and personality in general, has focused primarily on individual differences in adulthood, rather than in childhood and adolescence, and often include temperament traits.^143144145 Recently, there has been growing recognition of the need to study child and adolescent personality trait development in order to understand how traits develop and change throughout the lifespan.¹⁴⁶

Recent studies have begun to explore the developmental origins and trajectories of the Big Five among children and adolescents, especially those that relate to temperament.^147148149 Many researchers have sought to distinguish between personality and temperament.¹⁵⁰ Temperament often refers to early behavioral and affective characteristics that are thought to be driven primarily by genes.¹⁵¹ Models of temperament often include four trait dimensions: surgency/sociability, negative emotionality, persistence/effortful control, and activity level.¹⁵² Some of these differences in temperament are evident at, if not before, birth.¹⁵³¹⁵⁴ For example, both parents and researchers recognize that some newborn infants are peaceful and easily soothed while others are comparatively fussy and hard to calm.¹⁵⁵ Unlike temperament, however, many researchers view the development of personality as gradually occurring throughout childhood.¹⁵⁶ Contrary to some researchers who question whether children have stable personality traits, Big Five or otherwise,¹⁵⁷ most researchers contend that there are significant psychological differences between children that are associated with relatively stable, distinct, and salient behavior patterns.^158159160

The structure, manifestations, and development of the Big Five in childhood and adolescence have been studied using a variety of methods, including parent- and teacher-ratings,^161162163 preadolescent and adolescent self- and peer-ratings,^164165166 and observations of parent-child interactions.¹⁶⁷ Results from these studies support the relative stability of personality traits across the human lifespan, at least from preschool age through adulthood.^168169170171 More specifically, research suggests that four of the Big Five – namely Extraversion, Neuroticism, Conscientiousness, and Agreeableness – reliably describe personality differences in childhood, adolescence, and adulthood.^172173174175 However, some evidence suggests that Openness may not be a fundamental, stable part of childhood personality. Although some researchers have found that Openness in children and adolescents relates to attributes such as creativity, curiosity, imagination, and intellect,¹⁷⁶ many researchers have failed to find distinct individual differences in Openness in childhood and early adolescence.¹⁷⁷¹⁷⁸ Potentially, Openness may (a) manifest in unique, currently unknown ways in childhood or (b) may only manifest as children develop socially and cognitively.¹⁷⁹¹⁸⁰ Other studies have found evidence for all of the Big Five traits in childhood and adolescence as well as two other child-specific traits: Irritability and Activity.¹⁸¹ Despite these specific differences, the majority of findings suggest that personality traits – particularly Extraversion, Neuroticism, Conscientiousness, and Agreeableness – are evident in childhood and adolescence and are associated with distinct social-emotional patterns of behavior that are largely consistent with adult manifestations of those same personality traits.^182183184185 Some researchers have proposed the youth personality trait is best described by six trait dimensions: neuroticism, extraversion, openness to experience, agreeableness, conscientiousness, and activity.¹⁸⁶ Despite some preliminary evidence for this "Little Six" model,¹⁸⁷¹⁸⁸ research in this area has been delayed by a lack of available measures.

Previous research has found evidence that most adults become more agreeable and conscientious and less neurotic as they age.¹⁸⁹ This has been referred to as the maturation effect.¹⁹⁰ Many researchers have sought to investigate how trends in adult personality development compare to trends in youth personality development.¹⁹¹ Two main population-level indices have been important in this area of research: rank-order consistency and mean-level consistency. Rank-order consistency indicates the relative placement of individuals within a group.¹⁹² Mean-level consistency indicates whether groups increase or decrease on certain traits throughout the lifetime.¹⁹³

Findings from these studies indicate that, consistent with adult personality trends, youth personality becomes increasingly more stable in terms of rank-order throughout childhood.¹⁹⁴ Unlike adult personality research, which indicates that people become agreeable, conscientious, and emotionally stable with age,¹⁹⁵ some findings in youth personality research have indicated that mean levels of agreeableness, conscientiousness, and openness to experience decline from late childhood to late adolescence.¹⁹⁶ The disruption hypothesis, which proposes that biological, social, and psychological changes experienced during youth result in temporary dips in maturity, has been proposed to explain these findings.¹⁹⁷¹⁹⁸

Extraversion/positive emotionality

In Big Five studies, extraversion has been associated with surgency.¹⁹⁹ Children with high Extraversion are energetic, talkative, social, and dominant with children and adults, whereas children with low extraversion tend to be quiet, calm, inhibited, and submissive to other children and adults.²⁰⁰ Individual differences in extraversion first manifest in infancy as varying levels of positive emotionality.²⁰¹ These differences in turn predict social and physical activity during later childhood and may represent, or be associated with, the behavioral activation system.²⁰²²⁰³ In children, Extraversion/Positive Emotionality includes four sub-traits: three of these (activity, sociability, and shyness) are similar to the previously described traits of temperament;²⁰⁴²⁰⁵ the other is dominance.

• Activity: Similarly to findings in temperament research, children with high activity tend to have high energy levels and more intense and frequent motor activity compared to their peers.^206207208 Salient differences in activity reliably manifest in infancy, persist through adolescence, and fade as motor activity decreases in adulthood²⁰⁹ or potentially develops into talkativeness.²¹⁰²¹¹
• Dominance: Children with high dominance tend to influence the behavior of others, particularly their peers, to obtain desirable rewards or outcomes.^212213214 Such children are generally skilled at organizing activities and games²¹⁵ and deceiving others by controlling their nonverbal behavior.²¹⁶
• Shyness: Children with high shyness are generally socially withdrawn, nervous, and inhibited around strangers.²¹⁷ In time, such children may become fearful even around "known others", especially if their peers reject them.²¹⁸²¹⁹ Similar pattern was described in temperament longitudinal studies of shyness²²⁰
• Sociability: Children with high sociability generally prefer to be with others rather than alone.²²¹²²² During middle childhood, the distinction between low sociability and high shyness becomes more pronounced, particularly as children gain greater control over how and where they spend their time.^223224225

Development throughout adulthood

Many studies of longitudinal data, which correlate people's test scores over time, and cross-sectional data, which compare personality levels across different age groups, show a high degree of stability in personality traits during adulthood, especially Neuroticism that is often regarded as a temperament trait²²⁶ similarly to longitudinal research in temperament for the same traits.²²⁷ It is shown that the personality stabilizes for working-age individuals within about four years after starting working. There is also little evidence that adverse life events can have any significant impact on the personality of individuals.²²⁸ More recent research and meta-analyses of previous studies, however, indicate that change occurs in all five traits at various points in the lifespan. The new research shows evidence for a maturation effect. On average, levels of agreeableness and conscientiousness typically increase with time, whereas extraversion, neuroticism, and openness tend to decrease.²²⁹ Research has also demonstrated that changes in Big Five personality traits depend on the individual's current stage of development. For example, levels of agreeableness and conscientiousness demonstrate a negative trend during childhood and early adolescence before trending upwards during late adolescence and into adulthood.²³⁰ In addition to these group effects, there are individual differences: different people demonstrate unique patterns of change at all stages of life.²³¹

In addition, some research (Fleeson, 2001) suggests that the Big Five should not be conceived of as dichotomies (such as extraversion vs. introversion) but as continua. Each individual has the capacity to move along each dimension as circumstances (social or temporal) change. Someone is therefore not simply on one end of each trait dichotomy but is a blend of both, exhibiting some characteristics more often than others:²³²

Research regarding personality with growing age has suggested that as individuals enter their elder years (79–86), those with lower IQ see a raise in extraversion, but a decline in conscientiousness and physical well-being.²³³

Group differences

Gender differences

Some cross-cultural research has shown some patterns of gender differences on responses to the NEO-PI-R and the Big Five Inventory.²³⁴²³⁵ For example, women consistently report higher Neuroticism, Agreeableness, warmth (an extraversion facet) and openness to feelings, and men often report higher assertiveness (a facet of extraversion) and openness to ideas as assessed by the NEO-PI-R.²³⁶

A study of gender differences in 55 nations using the Big Five Inventory found that women tended to be somewhat higher than men in neuroticism, extraversion, agreeableness, and conscientiousness. The difference in neuroticism was the most prominent and consistent, with significant differences found in 49 of the 55 nations surveyed.²³⁷

Gender differences in personality traits are largest in prosperous, healthy, and more gender-egalitarian nations. The explanation for this, as stated by the researchers of a 2001 paper, is that actions by women in individualistic, egalitarian countries are more likely to be attributed to their personality, rather than being attributed to ascribed gender roles within collectivist, traditional countries.²³⁸

Measured differences in the magnitude of sex differences between more or less developed world regions were caused by the changes in the measured personalities of men, not women, in these respective regions. That is, men in highly developed world regions were less neurotic, less extraverted, less conscientious and less agreeable compared to men in less developed world regions. Women, on the other hand tended not to differ in personality traits across regions.²³⁹

Birth-order differences

Main article: Birth order

Frank Sulloway argues that firstborns are more conscientious, more socially dominant, less agreeable, and less open to new ideas compared to siblings that were born later. Large-scale studies using random samples and self-report personality tests, however, have found milder effects than Sulloway claimed, or no significant effects of birth order on personality.²⁴⁰²⁴¹ A study using the Project Talent data, which is a large-scale representative survey of American high school students, with 272,003 eligible participants, found statistically significant but very small effects (the average absolute correlation between birth order and personality was .02) of birth order on personality, such that firstborns were slightly more conscientious, dominant, and agreeable, while also being less neurotic and less sociable.²⁴² Parental socioeconomic status and participant gender had much larger correlations with personality.

In 2002, the Journal of Psychology posted a Big Five Personality Trait Difference; where researchers explored the relationship between the five-factor model and the Universal-Diverse Orientation (UDO) in counselor trainees. (Thompson, R., Brossart, D., and Mivielle, A., 2002). UDO is known as one social attitude that produces a strong awareness and/or acceptance towards the similarities and differences among individuals. (Miville, M., Romas, J., Johnson, J., and Lon, R. 2002) The study found that the counselor trainees that are more open to the idea of creative expression (a facet of Openness to Experience, Openness to Aesthetics) among individuals are more likely to work with a diverse group of clients, and feel comfortable in their role.²⁴³

Cultural differences

Main article: Big Five personality traits and culture

Individual differences in personality traits are widely understood to be conditioned by cultural context.²⁴⁴: 189 

Research into the Big Five has been pursued in a variety of languages and cultures, such as German,²⁴⁵ Chinese,²⁴⁶ and South Asian.²⁴⁷²⁴⁸ For example, Thompson has claimed to find the Big Five structure across several cultures using an international English language scale.²⁴⁹ Cheung, van de Vijver, and Leong (2011) suggest, however, that the Openness factor is particularly unsupported in Asian countries and that a different fifth factor is identified.²⁵⁰

Sopagna Eap et al. (2008) found that European-American men scored higher than Asian-American men on extroversion, conscientiousness, and openness, while Asian-American men scored higher than European-American men on neuroticism.²⁵¹ Benet-Martínez and Karakitapoglu-Aygün (2003) arrived at similar results.²⁵²

Recent work has found relationships between Geert Hofstede's cultural factors, Individualism, Power Distance, Masculinity, and Uncertainty Avoidance, with the average Big Five scores in a country.²⁵³ For instance, the degree to which a country values individualism correlates with its average extraversion, whereas people living in cultures which are accepting of large inequalities in their power structures tend to score somewhat higher on conscientiousness.²⁵⁴²⁵⁵

A 2017 study has found that countries' average personality trait levels are correlated with their political systems. Countries with higher average trait Openness tended to have more democratic institutions, an association that held even after factoring out other relevant influences such as economic development.²⁵⁶

Attempts to replicate the Big Five have succeeded in some countries but not in others. Some research suggests, for instance, that Hungarians do not have a single agreeableness factor.²⁵⁷ Other researchers have found evidence for agreeableness but not for other factors.²⁵⁸

Health

Personality and dementia

Some diseases cause changes in personality. For example, although gradual memory impairment is the hallmark feature of Alzheimer's disease, a systematic review of personality changes in Alzheimer's disease by Robins Wahlin and Byrne, published in 2011, found systematic and consistent trait changes mapped to the Big Five. The largest change observed was a decrease in conscientiousness. The next most significant changes were an increase in Neuroticism and decrease in Extraversion, but Openness and Agreeableness were also decreased. These changes in personality could assist with early diagnosis.²⁵⁹

A study published in 2023 found that the Big Five personality traits may also influence the quality of life experienced by people with Alzheimer's disease and other dementias, post diagnosis. In this study people with dementia with lower levels of Neuroticism self-reported higher quality of life than those with higher levels of Neuroticism while those with higher levels of the other four traits self-reported higher quality of life than those with lower levels of these traits. This suggests that as well as assisting with early diagnosis, the Big Five personality traits could help identify people with dementia potentially more vulnerable to adverse outcomes and inform personalized care planning and interventions.²⁶⁰

Personality disorders

Main article: Personality disorders

As of 2002, there were over fifty published studies relating the FFM to personality disorders.²⁶¹ Since that time, quite a number of additional studies have expanded on this research base and provided further empirical support for understanding the DSM personality disorders in terms of the FFM domains.²⁶²

In her review of the personality disorder literature published in 2007, Lee Anna Clark asserted that "the five-factor model of personality is widely accepted as representing the higher-order structure of both normal and abnormal personality traits".²⁶³ However, other researchers disagree that this model is widely accepted (see the section Critique below) and suggest that it simply replicates early temperament research.²⁶⁴²⁶⁵ Noticeably, FFM publications never compare their findings to temperament models even though temperament and mental disorders (especially personality disorders) are thought to be based on the same neurotransmitter imbalances, just to varying degrees.^266267268269

The five-factor model was claimed to significantly predict all ten personality disorder symptoms and outperform the Minnesota Multiphasic Personality Inventory (MMPI) in the prediction of borderline, avoidant, and dependent personality disorder symptoms.²⁷⁰ However, most predictions related to an increase in Neuroticism and a decrease in Agreeableness, and therefore did not differentiate between the disorders very well.²⁷¹

Common mental disorders

Converging evidence from several nationally representative studies has established three classes of mental disorders which are especially common in the general population: Depressive disorders (e.g., major depressive disorder (MDD), dysthymic disorder),²⁷² anxiety disorders (e.g., generalized anxiety disorder (GAD), post-traumatic stress disorder (PTSD), panic disorder, agoraphobia, specific phobia, and social phobia),²⁷³ and substance use disorders (SUDs).²⁷⁴²⁷⁵ The Five Factor personality profiles of users of different drugs may be different.²⁷⁶ For example, the typical profile for heroin users is N ⇑ , O ⇑ , A ⇓ , C ⇓ {\displaystyle {\rm {N}}\Uparrow ,{\rm {O}}\Uparrow ,{\rm {A}}\Downarrow ,{\rm {C}}\Downarrow } , whereas for ecstasy users the high level of N is not expected but E is higher: E ⇑ , O ⇑ , A ⇓ , C ⇓ {\displaystyle {\rm {E}}\Uparrow ,{\rm {O}}\Uparrow ,{\rm {A}}\Downarrow ,{\rm {C}}\Downarrow } .²⁷⁷

These common mental disorders (CMDs) have been empirically linked to the Big Five personality traits, neuroticism in particular. Numerous studies have found that having high scores of neuroticism significantly increases one's risk for developing a common mental disorder.²⁷⁸²⁷⁹ A large-scale meta-analysis (n > 75,000) examining the relationship between all of the Big Five personality traits and common mental disorders found that low conscientiousness yielded consistently strong effects for each common mental disorder examined (i.e., MDD, dysthymic disorder, GAD, PTSD, panic disorder, agoraphobia, social phobia, specific phobia, and SUD).²⁸⁰ This finding parallels research on physical health, which has established that conscientiousness is the strongest personality predictor of reduced mortality, and is highly negatively correlated with making poor health choices.²⁸¹²⁸² In regards to the other personality domains, the meta-analysis found that all common mental disorders examined were defined by high neuroticism, most exhibited low extraversion, only SUD was linked to agreeableness (negatively), and no disorders were associated with Openness.²⁸³ A meta-analysis of 59 longitudinal studies showed that high neuroticism predicted the development of anxiety, depression, substance abuse, psychosis, schizophrenia, and non-specific mental distress, also after adjustment for baseline symptoms and psychiatric history.²⁸⁴

The personality-psychopathology models

Five major models have been posed to explain the nature of the relationship between personality and mental illness. There is currently no single "best model", as each of them has received at least some empirical support. These models are not mutually exclusive – more than one may be operating for a particular individual and various mental disorders may be explained by different models.²⁸⁵²⁸⁶

• The Vulnerability/Risk Model: According to this model, personality contributes to the onset or etiology of various common mental disorders. In other words, pre-existing personality traits either cause the development of CMDs directly or enhance the impact of causal risk factors.^287288289290 There is strong support for neuroticism being a robust vulnerability factor.²⁹¹
• The Pathoplasty Model: This model proposes that premorbid personality traits impact the expression, course, severity, and/or treatment response of a mental disorder.^292293294 An example of this relationship would be a heightened likelihood of committing suicide in a depressed individual who also has low levels of constraint.²⁹⁵
• The Common Cause Model: According to the common cause model, personality traits are predictive of CMDs because personality and psychopathology have shared genetic and environmental determinants which result in non-causal associations between the two constructs.²⁹⁶²⁹⁷
• The Spectrum Model: This model proposes that associations between personality and psychopathology are found because these two constructs both occupy a single domain or spectrum and psychopathology is simply a display of the extremes of normal personality function.^298299300301 Support for this model is provided by an issue of criterion overlap. For instance, two of the primary facet scales of neuroticism in the NEO-PI-R are "depression" and "anxiety". Thus the fact that diagnostic criteria for depression, anxiety, and neuroticism assess the same content increases the correlations between these domains.³⁰²
• The Scar Model: According to the scar model, episodes of a mental disorder 'scar' an individual's personality, changing it in significant ways from premorbid functioning.^303304305306 An example of a scar effect would be a decrease in openness to experience following an episode of PTSD.³⁰⁷

Physical health

To examine how the Big Five personality traits are related to subjective health outcomes (positive and negative mood, physical symptoms, and general health concern) and objective health conditions (chronic illness, serious illness, and physical injuries), Jasna Hudek-Knezevic and Igor Kardum conducted a study from a sample of 822 healthy volunteers (438 women and 384 men).³⁰⁸ Out of the Big Five personality traits, they found neuroticism most related to worse subjective health outcomes and optimistic control to better subjective health outcomes. When relating to objective health conditions, connections drawn were presented weak, except that neuroticism significantly predicted chronic illness, whereas optimistic control was more closely related to physical injuries caused by accident.³⁰⁹

Being highly conscientious may add as much as five years to one's life.[]³¹⁰ The Big Five personality traits also predict positive health outcomes.³¹¹ In an elderly Japanese sample, conscientiousness, extraversion, and openness were related to lower risk of mortality.³¹²

Higher conscientiousness is associated with lower obesity risk. In already obese individuals, higher conscientiousness is associated with a higher likelihood of becoming non-obese over a five-year period.³¹³

Effect of personality traits through life

Education

Academic achievement

Personality plays an important role in academic achievement. A study of 308 undergraduates who completed the Five Factor Inventory Processes and reported their GPA suggested that conscientiousness and agreeableness have a positive relationship with all types of learning styles (synthesis-analysis, methodical study, fact retention, and elaborative processing), whereas neuroticism shows an inverse relationship. Moreover, extraversion and openness were proportional to elaborative processing. The Big Five personality traits accounted for 14% of the variance in GPA, suggesting that personality traits make some contributions to academic performance. Furthermore, reflective learning styles (synthesis-analysis and elaborative processing) were able to mediate the relationship between openness and GPA. These results indicate that intellectual curiosity significantly enhances academic performance if students combine their scholarly interest with thoughtful information processing.³¹⁴

A recent study of Israeli high-school students found that those in the gifted program systematically scored higher on openness and lower on neuroticism than those not in the gifted program. While not a measure of the Big Five, gifted students also reported less state anxiety than students not in the gifted program.³¹⁵ Specific Big Five personality traits predict learning styles in addition to academic success.

• GPA and exam performance are both predicted by conscientiousness
• neuroticism is negatively related to academic success
• openness predicts utilizing synthesis-analysis and elaborative-processing learning styles
• neuroticism negatively correlates with learning styles in general
• openness and extraversion both predict all four learning styles.³¹⁶

Studies conducted on college students have concluded that hope, which is linked to agreeableness,³¹⁷ conscientiousness, neuroticism, and openness,³¹⁸ has a positive effect on psychological well-being. Individuals high in neurotic tendencies are less likely to display hopeful tendencies and are negatively associated with well-being.³¹⁹ Personality can sometimes be flexible and measuring the big five personality for individuals as they enter certain stages of life may predict their educational identity. Recent studies have suggested the likelihood of an individual's personality affecting their educational identity.³²⁰

Learning styles

Learning styles have been described as "enduring ways of thinking and processing information".³²¹

In 2008, the Association for Psychological Science (APS) commissioned a report that concludes that no significant evidence exists that learning-style assessments should be included in the education system.³²² Thus it is premature, at best, to conclude that the evidence links the Big Five to "learning styles", or "learning styles" to learning itself.

However, the APS report also suggested that all existing learning styles have not been exhausted and that there could exist learning styles worthy of being included in educational practices. There are studies that conclude that personality and thinking styles may be intertwined in ways that link thinking styles to the Big Five personality traits.³²³ There is no general consensus on the number or specifications of particular learning styles, but there have been many different proposals.

As one example, Schmeck, Ribich, and Ramanaiah (1997) defined four types of learning styles:³²⁴

• synthesis analysis
• methodical study
• fact retention
• elaborative processing

When all four facets are implicated within the classroom, they will each likely improve academic achievement.³²⁵ By identifying learning strategies in individuals, learning and academic achievement can be improved, and a deeper understanding of information processing can be gained.³²⁶ This model asserts that students develop either agentic/shallow processing or reflective/deep processing. Deep processors are more often found to be more conscientious, intellectually open, and extraverted than shallow processors. Deep processing is associated with appropriate study methods (methodical study) and a stronger ability to analyze information (synthesis analysis), whereas shallow processors prefer structured fact retention learning styles and are better suited for elaborative processing.³²⁷ The main functions of these four specific learning styles are as follows:

Openness has been linked to learning styles that often lead to academic success and higher grades like synthesis analysis and methodical study. Because conscientiousness and openness have been shown to predict all four learning styles, it suggests that individuals who possess characteristics like discipline, determination, and curiosity are more likely to engage in all of the above learning styles.³²⁹

According to the research carried out by Komarraju, Karau, Schmeck & Avdic (2011), conscientiousness and agreeableness are positively related with all four learning styles, whereas neuroticism was negatively related with those four. Furthermore, extraversion and openness were only positively related to elaborative processing, and openness itself correlated with higher academic achievement.³³⁰

In addition, a previous study by psychologist Mikael Jensen has shown relationships between the Big Five personality traits, learning, and academic achievement. According to Jensen, all personality traits, except neuroticism, are associated with learning goals and motivation. Openness and conscientiousness influence individuals to learn to a high degree unrecognized, while extraversion and agreeableness have similar effects.³³¹ Conscientiousness and neuroticism also influence individuals to perform well in front of others for a sense of credit and reward, while agreeableness forces individuals to avoid this strategy of learning.³³² Jensen's study concludes that individuals who score high on the agreeableness trait will likely learn just to perform well in front of others.³³³

Besides openness, all Big Five personality traits helped predict the educational identity of students. Based on these findings, scientists are beginning to see that the Big Five traits might have a large influence of on academic motivation that leads to predicting a student's academic performance.³³⁴

Some authors suggested that Big Five personality traits combined with learning styles can help predict some variations in the academic performance and the academic motivation of an individual which can then influence their academic achievements.³³⁵ This may be seen because individual differences in personality represent stable approaches to information processing. For instance, conscientiousness has consistently emerged as a stable predictor of success in exam performance, largely because conscientious students experience fewer study delays.³³⁶ Conscientiousness shows a positive association with the four learning styles because students with high levels of conscientiousness develop focused learning strategies and appear to be more disciplined and achievement-oriented.

Personality and learning styles are both likely to play significant roles in influencing academic achievement. College students (308 undergraduates) completed the Five Factor Inventory and the Inventory of Learning Processes and reported their grade point average. Two of the Big Five traits, conscientiousness and agreeableness, were positively related with all four learning styles (synthesis analysis, methodical study, fact retention, and elaborative processing), whereas neuroticism was negatively related with all four learning styles. In addition, extraversion and openness were positively related with elaborative processing. The Big Five together explained 14% of the variance in grade point average (GPA), and learning styles explained an additional 3%, suggesting that both personality traits and learning styles contribute to academic performance. Further, the relationship between openness and GPA was mediated by reflective learning styles (synthesis-analysis and elaborative processing). These latter results suggest that being intellectually curious fully enhances academic performance when students combine this scholarly interest with thoughtful information processing. Implications of these results are discussed in the context of teaching techniques and curriculum design.

— M Komarraju³³⁷

Distance Learning

When the relationship between the five-factor personality traits and academic achievement in distance education settings was examined in brief, the openness personality trait was found to be the most important variable that has a positive relationship with academic achievement in distance education environments. In addition, it was found that self-discipline, extraversion, and adaptability personality traits are generally in a positive relationship with academic achievement. The most important personality trait that has a negative relationship with academic achievement has emerged as neuroticism. The results generally show that individuals who are organized, planned, determined, who are oriented to new ideas and independent thinking have increased success in distance education environments. On the other hand, it can be said that individuals with anxiety and stress tendencies generally have lower academic success.^338339340

Employment

Occupation and personality fit

Researchers have long suggested that work is more likely to be fulfilling to the individual and beneficial to society when there is alignment between the person and their occupation.³⁴¹ For instance, software programmers and scientists often rank high on Openness to experience and tend to be intellectually curious, think in symbols and abstractions, and find repetition boring.³⁴² Psychologists and sociologists rank higher on Agreeableness and Openness than economists and jurists.³⁴³

Work success

It is believed that the Big Five traits are predictors of future performance outcomes to varying degrees. Specific facets of the Big Five traits are also thought to be indicators of success in the workplace, and each individual facet can give a more precise indication as to the nature of a person. Different traits' facets are needed for different occupations. Various facets of the Big Five traits can predict the success of people in different environments. The estimated levels of an individual's success in jobs that require public speaking versus one-on-one interactions will differ according to whether that person has particular traits' facets.³⁴⁴

Job outcome measures include job and training proficiency and personnel data.³⁴⁵ However, research demonstrating such prediction has been criticized, in part because of the apparently low correlation coefficients characterizing the relationship between personality and job performance. In a 2007 article states: "The problem with personality tests is ... that the validity of personality measures as predictors of job performance is often disappointingly low. The argument for using personality tests to predict performance does not strike me as convincing in the first place."³⁴⁶

Such criticisms were put forward by Walter Mischel,³⁴⁷ whose publication caused a two-decades' long crisis in personality psychometrics. However, later work demonstrated that the correlations obtained by psychometric personality researchers were actually very respectable by comparative standards,³⁴⁸ and that the economic value of even incremental increases in prediction accuracy was exceptionally large, given the vast difference in performance by those who occupy complex job positions.³⁴⁹

Research has suggested that individuals who are considered leaders typically exhibit lower amounts of neurotic traits, maintain higher levels of openness, balanced levels of conscientiousness, and balanced levels of extraversion.^350351352 Further studies have linked professional burnout to neuroticism, and extraversion to enduring positive work experience.³⁵³ Studies have linked national innovation, leadership, and ideation to openness to experience and conscientiousness.³⁵⁴ Occupational self-efficacy has also been shown to be positively correlated with conscientiousness and negatively correlated with neuroticism.³⁵⁵ Some research has also suggested that the conscientiousness of a supervisor is positively associated with an employee's perception of abusive supervision.³⁵⁶ Others have suggested that low agreeableness and high neuroticism are traits more related to abusive supervision.³⁵⁷

Openness is positively related to proactivity at the individual and the organizational levels and is negatively related to team and organizational proficiency. These effects were found to be completely independent of one another. This is also counter-conscientious and has a negative correlation to Conscientiousness.³⁵⁸

Agreeableness is negatively related to individual task proactivity. Typically this is associated with lower career success and being less able to cope with conflict. However there are benefits to the Agreeableness personality trait including higher subjective well-being; more positive interpersonal interactions and helping behavior; lower conflict; lower deviance and turnover.³⁵⁹ Furthermore, attributes related to Agreeableness are important for workforce readiness for a variety of occupations and performance criteria.³⁶⁰ Research has suggested that those who are high in agreeableness are not as successful in accumulating income.³⁶¹

Extraversion results in greater leadership emergence and effectiveness; as well as higher job and life satisfaction. However extraversion can lead to more impulsive behaviors, more accidents and lower performance in certain jobs.³⁶²

Conscientiousness is highly predictive of job performance in general,³⁶³ and is positively related to all forms of work role performance, including job performance and job satisfaction, greater leadership effectiveness, lower turnover and deviant behaviors. However this personality trait is associated with reduced adaptability, lower learning in initial stages of skill acquisition and more interpersonally abrasiveness, when also low in agreeableness.³⁶⁴ It is also not the case that more or extreme conscientiousness is always necessarily better as there does appear to be a link between conscientiousness and obsessive-compulsive personality disorder (OCPD). Selecting employees for a moderate level of conscientiousness may actually provide the best occupational outcome.³⁶⁵

Neuroticism is negatively related to all forms of work role performance. This increases the chance of engaging in risky behaviors.³⁶⁶³⁶⁷

Two theories have been integrated in an attempt to account for these differences in work role performance. Trait activation theory posits that within a person trait levels predict future behavior, that trait levels differ between people, and that work-related cues activate traits which leads to work relevant behaviors. Role theory suggests that role senders provide cues to elicit desired behaviors. In this context, role senders provide workers with cues for expected behaviors, which in turn activates personality traits and work relevant behaviors. In essence, expectations of the role sender lead to different behavioral outcomes depending on the trait levels of individual workers, and because people differ in trait levels, responses to these cues will not be universal.³⁶⁸

Remote Work/Telework

As of 2020, remote work has become more and more prevalent as brought on by the COVID-19 pandemic. However, research has shown that the Big Five personality traits still influence remote work. Gavoille and Hazans have found that conscientiousness (β=0.06) and openness to experience are both positively correlated with willingness to work and worker productivity within a remote setting, with openness to experience being less significant (β=0.021). This is then contrasted with extraversion (β=-0.038), which negatively correlates with Willingness to work and openness. Another conclusion that was found is that gender did not play a role in the difference between conscientiousness and extraversion, and willingness to work from home.³⁶⁹ Similarly, Wright investigated the influence of Big Five on the soft skills in the remote workplace, such as effort and cooperation. She delineated soft skills into two different groups, Task Performance and Contextual Performance, with each having three subgroups. Task Performance was more aligned with specific job responsibilities and handling cognitive tasks associated with their job, and the three subgroups were Job Knowledge, Organizational Skills, and Efficiency. Wright found that Job Knowledge did not correlate with any Big Five traits, Organizational Skill is only significantly correlated with Conscientiousness (T=7.952, P=.001), and Efficiency is significantly correlated with Conscientiousness (T=3.8, P=.001), and Neuroticism(T=-2.6, P=.008), which it is a negative correlation. Contextual Performance is concerned with non-job core requirements, such as perceived effort and job cooperation, with the subgroups being Persistent Effort, Cooperation, and Organizational Conscientiousness. Wright found that Persistent Effort is positively correlated with Openness(t=2.4, P=.014) and Conscientiousness (T=3.1, P=.002), and negatively correlated with Neuroticism (T=-3.2, P=.001). Cooperation was positively correlated with Extraversion (t=2.6, P=.009) and Conscientiousness (t=2.82, P=.005), as well as Organizational Conscientiousness was positively correlated with Agreeableness (t=4.059, P<.001) and Conscientiousness (t=4.511, P<.001)³⁷⁰

On another tack, scientists wanted to discover if the Big Five has any effect on remote worker burnout, and the effect that different Big Five traits have on worker health and engagement. Olsen et al found that when remote work days are increased, individuals high in extraversion start to struggle with work engagement (β=-.094, P<.03), and individuals with higher neuroticism are more likely to have poorer health (p= -.23), work engagement (p=-.18), and an increase in sick leaves(p=.38).³⁷¹ However, Olsen found that conscientiousness, coupled with an increase in remote work days, can lead to a decrease in general health, contrary to all of the benefits it has listed above. Similarly, Para et al. found that individuals with higher Neuroticism (β=.138, p<.05) also tend to have higher Remote Work Exhaustion (RWE). They also found that conscientiousness(β=-.336, p<.001) and agreeableness (β=-.267, p<.001) were negatively correlated with RWE, meaning that they were more resilient against RWE over large spans of remote work days.³⁷² The author attributed conscientious individuals to being hard workers and dependable, while agreeableness was attributed to the situation the study was completed under, which was the at-home quarantine due to COVID-19, stating individuals with high agreeableness did well with the forced contact due to quarantine, which transferred over to their work.

Romantic relationships

Various researchers have explored the association of Big Five and romantic relationships in terms of relationship satisfaction.^373374375 A meta-analysis showed that there was a higher level of marital satisfaction if their spouse showed lower levels in neuroticism (.22), but higher levels in agreeableness (.15) and conscientiousness(.12). There was only a weak correlation, but it was the same level of satisfaction for both genders. Much like the previous meta-analysis, a study on self-reported big five traits showed that those with higher levels of agreeableness, emotional stability, conscientiousness, and extraversion had higher levels of marital satisfaction(.20). That same study found that there was little to no difference in marital satisfaction if the two partners had similar or different levels of trait personality.³⁷⁶

O’Brien and colleagues³⁷⁷ examined the association of Big Five and romantic relationships by investigating participants’ commitment levels. The three levels of commitment are affective commitment (emotional attachment), continuance commitment (financial considerations), and normative commitment (the ethical and moral responsibilities). The commitment levels were based on the taxonomy of organizational commitment³⁷⁸ and the conceptual model of marital commitment of Johnson³⁷⁹ and Johnson et al.³⁸⁰ 122 Individuals currently in a committed relationship responded to a 50-item personality questionnaire from the International Personality Item Pool (IPIP, 2006), and a questionnaire on commitment modified from Allen.³⁸¹ The key findings showed that participants high in Extraversion reported high levels of affective commitment; participants high on Extraversion were higher on Openness to Experience and affective commitment. Conscientiousness demonstrated a negative relationship with continuance commitment. While Extraversion and Agreeableness exhibited a positive correlation with each other, no significant relationships were found between Agreeableness and any of the commitment measures. The findings indicated gender differences in that women with lower levels of Openness to Experience were often paired with partners who scored higher in Extraversion.  Men who exhibited strong affective commitment were more likely to be in relationships with women high in Conscientiousness. Additionally, women whose partners showed high affective commitment tended to be higher in both Conscientiousness and Emotional Stability.

Asselmann and Sprecht³⁸² examined the association of Big Five (BFI-S) and romantic relationships through major life events across years in 2005, 2009, 2013, and 2017 with a sample of 49,932 participants in Germany. Those major life events are (1) moving in with a partner, (2) getting married, (3) getting separated, and (4) getting divorced. Researchers also examined whether the Big Five personality traits play a significant role in romantic relationships. Along the spectrum of a person’s life satisfaction, marital satisfaction (one of romantic relationships) is shown to be stronger than job satisfaction, health satisfaction, and social satisfaction.³⁸³ The key findings from Asselmann and Sprecht showed that more extraverted individuals were more likely to move in with a partner. Less agreeable and less emotionally stable women were more likely to move in with a partner. Men were more extraverted in the years before moving in and became gradually more open and more conscientious after moving in. Less agreeable men were more likely to get married. Individuals who got married became less open in the first three years after the marriage. Women became more extraverted after being separated. Men with lower emotional stability and women who were both less emotionally stable and more extraverted were more prone to experiencing relationship breakups. Individuals who got divorced were less agreeable in the years before the divorce. Personality may change after specific events. For example, both men and women who experienced separation or divorce became less emotionally stable in the following years. The results implicated that total agreeableness was not a guarantee for long-lasting romantic relationships, as less agreeable individuals were more likely to experience both positive and negative major romantic events.³⁸⁴ Getting into a long-term romantic relationship can kick-start personality development in young adults ages 20–30 as they are faced with new social situations and expectations. For instance, high levels of trait neuroticism at the beginning of relationships can be seen decreasing over 8 years once the relationship has begun, as well as other Big Five personality traits, such as Conscientiousness and Agreeableness, can be seen increasing in long-term relationships.³⁸⁵

Political identification

The Big Five Personality Model also has applications in the study of political psychology. Studies have been finding links between the big five personality traits and political identification. It has been found by several studies that individuals who score high in Conscientiousness are more likely to possess a right-wing political identification.^386387388 On the opposite end of the spectrum, a strong correlation was identified between high scores in Openness to Experience and a left-leaning ideology.^389390391 While the traits of agreeableness, extraversion, and neuroticism have not been consistently linked to either conservative or liberal ideology, with studies producing mixed results, such traits are promising when analyzing the strength of an individual's party identification.³⁹²³⁹³ However, correlations between the Big Five and political beliefs, while present, tend to be small, with one study finding correlations ranged from 0.14 to 0.24.³⁹⁴

Scope of predictive power

The predictive effects of the Big Five personality traits relate mostly to social functioning and rules-driven behavior and are not very specific for prediction of particular aspects of behavior. For example, it was noted by all temperament researchers that high neuroticism precedes the development of all common mental disorders³⁹⁵ and is not associated with personality.³⁹⁶ Further evidence is required to fully uncover the nature and differences between personality traits, temperament and life outcomes. Social and contextual parameters also play a role in outcomes and the interaction between the two is not yet fully understood.³⁹⁷

Religiosity

Though the effect sizes are small: Of the Big Five personality traits high Agreeableness, Conscientiousness and Extraversion relate to general religiosity, while Openness relate negatively to religious fundamentalism and positively to spirituality. High Neuroticism may be related to extrinsic religiosity, whereas intrinsic religiosity and spirituality reflect Emotional Stability.³⁹⁸

Measurements

Several measures of the Big Five exist:

• International Personality Item Pool (IPIP)³⁹⁹
• NEO-PI-R
• The Ten-Item Personality Inventory (TIPI) and the Five Item Personality Inventory (FIPI) are very abbreviated rating forms of the Big Five personality traits.⁴⁰⁰
• Self-descriptive sentence questionnaires⁴⁰¹
• Lexical questionnaires⁴⁰²
• Self-report questionnaires⁴⁰³
• Relative-scored Big 5 measure⁴⁰⁴

The most frequently used measures of the Big Five comprise either items that are self-descriptive sentences⁴⁰⁵ or, in the case of lexical measures, items that are single adjectives.⁴⁰⁶ Due to the length of sentence-based and some lexical measures, short forms have been developed and validated for use in applied research settings where questionnaire space and respondent time are limited, such as the 40-item balanced International English Big-Five Mini-Markers⁴⁰⁷ or a very brief (10 item) measure of the Big Five domains.⁴⁰⁸ Research has suggested that some methodologies in administering personality tests are inadequate in length and provide insufficient detail to truly evaluate personality. Usually, longer, more detailed questions will give a more accurate portrayal of personality.⁴⁰⁹ At the same time, shorter questionnaires may be sufficient to get a reasonable estimate of Big Five personality scores when questions are carefully selected and statistical imputation is used.⁴¹⁰ The five factor structure has been replicated in peer reports.⁴¹¹ However, many of the substantive findings rely on self-reports.

Much of the evidence on the measures of the Big 5 relies on self-report questionnaires, which makes self-report bias and falsification of responses difficult to deal with and account for.⁴¹² It has been argued that the Big Five tests do not create an accurate personality profile because the responses given on these tests are not true in all cases and can be falsified.⁴¹³ For example, questionnaires are answered by potential employees who might choose answers that paint them in the best light.⁴¹⁴

Research suggests that a relative-scored Big Five measure in which respondents had to make repeated choices between equally desirable personality descriptors may be a potential alternative to traditional Big Five measures in accurately assessing personality traits, especially when lying or biased responding is present.⁴¹⁵ When compared with a traditional Big Five measure for its ability to predict GPA and creative achievement under both normal and "fake good"-bias response conditions, the relative-scored measure significantly and consistently predicted these outcomes under both conditions; however, the Likert questionnaire lost its predictive ability in the faking condition. Thus, the relative-scored measure proved to be less affected by biased responding than the Likert measure of the Big Five.

Andrew H. Schwartz analyzed 700 million words, phrases, and topic instances collected from the Facebook messages of 75,000 volunteers, who also took standard personality tests, and found striking variations in language with personality, gender, and age.⁴¹⁶

See also

• Core self-evaluations
• Dark triad
• DISC assessment
• Facet
• Genomics of personality traits
• Goal orientation
• HEXACO model of personality structure
• Moral foundations theory
• Myers–Briggs Type Indicator
• Personality psychology
• Szondi test
• Trait theory

External links

• International Personality Item Pool, public domain list of items keyed to the big five personality traits.
• Selection from the "Handbook of personality: Theory and research" for researchers
• Rentfrow PJ, Jokela M, Lamb ME (2015). "Regional personality differences in Great Britain". PLOS ONE. 10 (3): e0122245. Bibcode:2015PLoSO..1022245R. doi:10.1371/journal.pone.0122245. PMC 4372610. PMID 25803819.
• U.S. Regions Exhibit Distinct Personalities, Research Reveals

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