Understanding the Big Five Personality Traits

What Are the Big Five Personality Traits?

The Big Five personality traits are the dominant scientific framework for measuring and describing human personality — and if you’ve ever wondered why some students seem to breeze through deadlines while others crumble under pressure, or why certain colleagues thrive in team settings while others prefer solitary deep work, the answer likely lives somewhere in the OCEAN model. This isn’t pop psychology. It’s the product of over 80 years of empirical research, refined through factor analysis across dozens of cultures and hundreds of thousands of participants.

The model — often recalled by the acronym OCEAN (or sometimes CANOE) — organizes the vast, complex landscape of human personality into five measurable dimensions: Openness to Experience, Conscientiousness, Extraversion, Agreeableness, and Neuroticism. What makes the Big Five distinctive is that these aren’t arbitrary categories. They emerged from data. Psychologists applied factor analysis to large sets of personality-describing words in natural language and found, repeatedly and independently across different research teams, that the same five structures kept appearing. That convergence is the foundation of the model’s scientific credibility. Developing strong critical thinking skills in psychology means understanding how empirical models are built — the Big Five is a perfect case study.

Each trait is a spectrum, not a category. You don’t “have” conscientiousness or “lack” extraversion. You score somewhere along a continuous scale on each dimension, and your personality is described by the combination of all five positions. This is a critical conceptual point: the Big Five isn’t a typology — it doesn’t put you in a box. It’s a dimensional model that acknowledges the full complexity of individual differences. [APA — Five Factor Model Overview](https://www.apa.org/topics/personality/five-factor)

Where Did the Big Five Come From?

The origins of the Big Five trace back to the lexical hypothesis — the idea that the most important and universal personality traits will eventually find their way into everyday language. The more significant a trait is to human social life, the more words a culture develops to describe it. British scientist Sir Francis Galton first articulated this hypothesis in 1884. Gordon Allport and Henry Odbert operationalized it in 1936 by combing through Webster’s dictionary and compiling nearly 18,000 English words that described personality characteristics. That enormous list was progressively reduced by Raymond Cattell, who used factor analysis to narrow it to 16 dimensions, and then by Ernest Tupes and Raymond Christal at Lackland Air Force Base, who in 1961 found consistent evidence for five underlying factors.

The real consolidation came in the 1980s and 1990s when Paul Costa Jr. and Robert R. McCrae at the National Institute on Aging in Maryland developed the NEO Personality Inventory, systematically measuring the five factors and demonstrating their predictive validity across the lifespan. Lewis Goldberg at Oregon Research Institute coined the term “Big Five” and developed the publicly available IPIP scales, making the framework accessible to the broader research community. Today, the Five Factor Model is taught in virtually every introductory psychology course in the United States and UK, used by employers from Google to the NHS, and referenced in thousands of peer-reviewed studies annually.

What the OCEAN Acronym Stands For

OCEAN stands for Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism — the five core dimensions. An alternative acronym, CANOE, uses the same letters in a different order. Both refer to the same Five Factor Model (FFM). In academic psychology, the model is most frequently cited as either the Big Five or the FFM, with the NEO personality instruments (NEO-PI-R and NEO-FFI) being the most widely used validated measurement tools. Holland’s career theory is one related framework that overlaps with Big Five trait patterns in career psychology, worth exploring if you’re connecting personality to vocational choice.

The Big Five Traits Explained: O, C, E, A, N in Depth

Understanding the Big Five personality traits properly means going beyond surface definitions. Each trait has a rich psychological profile — specific behavioral tendencies, emotional patterns, neurological correlates, and documented real-world effects. Here’s what the research actually says about each dimension.

Key Entities in the Big Five: Researchers, Organizations, and Assessment Tools

Understanding the Big Five personality traits at a scholarly level requires knowing who built the framework, which institutions drove its development, and which assessment tools are actually validated. This matters for students writing research papers, professionals interpreting test results, and anyone trying to evaluate claims made about personality science.

Paul Costa Jr. and Robert R. McCrae — The Architects of FFM

Paul Costa Jr. and Robert R. McCrae are the researchers most closely associated with the modern Big Five framework. Working at the National Institute on Aging (NIA) in Baltimore, Maryland — part of the US National Institutes of Health — they developed the NEO Personality Inventory in the 1980s, initially measuring three dimensions (Neuroticism, Extraversion, Openness) before expanding to the full five-factor model with the addition of Agreeableness and Conscientiousness. What makes Costa and McCrae unique as a research entity is the extraordinary longitudinal database they assembled — tracking the same individuals’ personality scores across decades — which produced the landmark findings about how personality changes (and stabilizes) across the lifespan. Their research demonstrated that personality traits have roughly 50% heritability, show meaningful stability from age 30 onward, and predict life outcomes from health behaviors to career success to relationship quality. Prominent personalities and their sociological significance is a topic closely connected to the real-world applications of trait research.

Lewis Goldberg and Oregon Research Institute

Lewis Goldberg, working at Oregon Research Institute in Eugene, Oregon, coined the term “Big Five” and made a transformative contribution by developing the International Personality Item Pool (IPIP) — a free, publicly available repository of personality measurement scales that opened the framework to researchers worldwide without the cost barriers of commercial instruments. Goldberg’s marker scales, based on adjective ratings, became a standard in academic research. What distinguishes Goldberg’s contribution is his commitment to open science: by making validated scales freely available, he enabled the explosion of Big Five research across diverse global populations that solidified the model’s cross-cultural validity. Writing rigorous research papers on personality psychology requires understanding which measurement instruments are validated and which are not — Goldberg’s IPIP scales are among the most well-documented.

Gordon Allport and the Lexical Foundation

Gordon Allport — a pioneer of American personality psychology at Harvard University — and his colleague Henry Odbert conducted the foundational lexical study in 1936 that launched the entire empirical tradition the Big Five emerged from. By systematically cataloguing personality-describing words from the dictionary, they established the principle that language contains the map of personality. Allport’s 1937 book Personality: A Psychological Interpretation framed personality as the “dynamic organization within the individual of those psychophysical systems that determine his characteristic behavior and thought” — a definition still cited in contemporary textbooks. Allport was also a vocal critic of purely statistical approaches to personality, arguing for idiographic methods that capture the uniqueness of individual persons rather than just population-level dimensions. That tension between statistical generalization and individual uniqueness remains lively in personality psychology today.

Key Measurement Instruments: What’s Actually Validated

HEXACO: The Leading Alternative Model

The HEXACO model, developed by Kibeom Lee at University of Calgary and Michael Ashton at Brock University in Ontario, proposes six personality dimensions by adding Honesty-Humility to variants of the Big Five traits. Honesty-Humility captures sincerity, fairness, greed avoidance, and modesty — aspects of moral character that some researchers argue are inadequately captured by the Big Five’s Agreeableness. A 2024 study found that Big Five traits generally maintain predictive validity across contexts, but HEXACO’s additional dimension adds incremental validity particularly for predicting ethical workplace behavior, counterproductive work behavior, and dark triad personality patterns. For students writing comparative essays on personality models, the HEXACO model offers a compelling challenge to the Big Five’s claim to comprehensiveness. Comparison and contrast essay writing is a core skill for analyzing competing theoretical frameworks like these.

The Big Five Personality Traits and Academic Performance: What Research Actually Shows

For college and university students, the most practically valuable question about the Big Five personality traits is simple: does your personality predict how well you’ll do academically? The answer, backed by extensive peer-reviewed evidence, is: yes — more than most people realize. And the specific trait that matters most isn’t the one most students would guess.

Conscientiousness: The Academic Achievement Engine

Across hundreds of studies and multiple meta-analyses, Conscientiousness emerges as the single strongest personality predictor of academic performance at every educational level. A landmark meta-analysis by Mammadov (2021) published in [the Journal of Personality found that Conscientiousness accounted for 28% of explained variance in academic performance even after controlling for cognitive ability. The practical implication is substantial: your diligence, planning behavior, and follow-through predict your GPA almost as powerfully as your raw academic intelligence. This is actually an empowering finding. Unlike cognitive ability, conscientious behaviors — organization, time management, assignment completion habits — are learnable and improvable. A study in [Frontiers in Psychology found that high-conscientiousness students showed significantly better GPA outcomes than those high on openness, agreeableness, extroversion, or neuroticism. Students from organized family structures tended to score higher on conscientiousness and performed better academically, suggesting that early environment shapes this critical trait. Editing and revising academic work thoroughly — a classic conscientious behavior — directly improves output quality.

Openness, Agreeableness, and the Early Years

While Conscientiousness dominates the academic performance literature, Openness to Experience shows a notable positive relationship with academic achievement — particularly in earlier stages of education. Mammadov’s meta-analysis found that Openness was an especially important predictor of student performance in elementary and middle school, when curiosity and broad intellectual engagement drive learning more than systematic study habits. At the university level, Openness remains positively associated with performance in majors requiring creative thinking, hypothesis generation, and interdisciplinary synthesis. Research conducted with US undergraduates by Noftle and Robins found that for psychology majors specifically, Conscientiousness had the greatest positive impact, followed by Openness — a pattern that likely reflects psychology’s combination of methodological rigor and conceptual creativity. Writing literary reflection essays draws on exactly the combination of Openness and Conscientiousness that predicts success in humanities and social science majors.

Neuroticism: The Academic Risk Factor

Neuroticism consistently shows negative relationships with academic performance. High-neuroticism students experience more anxiety before examinations, more ruminative self-doubt during assignments, and greater cognitive impairment under deadline pressure. They also demonstrate higher susceptibility to test anxiety — a specific construct closely associated with high Neuroticism that has been shown to reduce exam scores independently of actual knowledge levels. The mechanism is clear: emotional volatility and negative affect consume cognitive resources that would otherwise be available for problem-solving and recall. Why multitasking hurts quality maps onto a similar dynamic — divided attentional resources impair performance, much as chronic anxiety does for high-neuroticism students. The best practical intervention for high-neuroticism students isn’t more studying — it’s addressing the underlying anxiety patterns that impair performance.

Extraversion and Introverts in Academic Settings

Contrary to common assumptions, Extraversion shows surprisingly weak relationships with academic performance. Some research even finds a slight advantage for introverts in academic contexts, where sustained independent study, careful reading, and written analysis are the primary activities. Introverted students may find it easier to resist social distractions and maintain the deep focus that demanding coursework requires. Extraverted students may perform better in participation-heavy courses, presentations, and collaborative learning environments — but not necessarily in the examination-heavy formats that dominate most undergraduate assessment. The meta-analysis by Connelly et al. found that Extraversion’s effect on academic performance was essentially zero (ρ = -0.01), compared to a significant positive effect for Conscientiousness (ρ = 0.28). Understanding your own Extraversion score helps you design study environments and social academic strategies that suit your natural preferences rather than fighting against them.

Big Five Personality Traits and Career Success: What Employers and Researchers Know

The Big Five personality traits have become increasingly central to organizational psychology and human resources research, particularly in the United States and UK where personality-informed hiring and team composition decisions have become standard practice in Fortune 500 companies. From Google’s people analytics team to the NHS Leadership Academy in the UK, the Five Factor Model shapes how organizations think about talent, performance, and team dynamics.

Which Traits Predict Job Performance Best?

The meta-analytic evidence is clear: Conscientiousness is the strongest predictor of job performance across virtually every occupational category. A synthesis of 54 meta-analyses found that Conscientiousness produced a corrected correlation of ρ = 0.19 with overall performance, with particularly strong effects in detailed, compliance-heavy, or knowledge-work roles. Unlike academic settings where cognitive ability dominates, in most workplaces the traits of showing up reliably, completing work on time, taking responsibility for errors, and maintaining standards under pressure (all Conscientiousness facets) have enormous practical value. Marketing strategies and professional presentation both reward the organized, reliable behaviors that define high Conscientiousness.

However, the optimal trait profile varies dramatically by role. Leadership positions benefit strongly from Extraversion (ρ = 0.14 for job performance in the meta-analysis), particularly the assertiveness and positive emotional energy facets. Sales roles reward extraverted individuals who can build rapport quickly and sustain high-energy social interaction. Research and technical roles tend to reward Openness. Helping professions — social work, healthcare, teaching — benefit from high Agreeableness. Understanding your own trait profile in relation to your target career is one of the most practically valuable applications of the Big Five for students making major academic and career decisions. The Holland vocational theory explicitly maps onto Big Five profiles, and the two frameworks are often used together in career counseling.

Personality and Leadership

Research on the Big Five and leadership is extensive. A landmark meta-analysis found that Extraversion is the strongest personality predictor of leadership effectiveness across most organizational contexts, followed by Conscientiousness and Openness. Extraverted leaders set the tone of energy and engagement for their teams; conscientious leaders create systems, follow through on commitments, and model the reliability that builds trust; open leaders generate creative vision and signal receptivity to new approaches. Neuroticism is consistently negatively associated with leadership effectiveness, as emotional volatility undermines the consistency and calm that effective leadership requires. Agreeableness shows a more complex relationship with leadership — highly agreeable leaders may be well-liked but can struggle with making difficult personnel decisions, delivering critical feedback, and maintaining authority in adversarial contexts. The P-O-L-C management framework can be usefully analyzed through a Big Five lens for students studying organizational management.

Big Five Traits and Team Composition

One of the most practically valuable areas of Big Five research for working professionals is team composition. Organizations in the US and UK have invested substantially in understanding how personality trait combinations within teams affect collective performance. Research consistently shows that team-level Conscientiousness and Agreeableness predict team cohesion and collaborative performance, while team-level Neuroticism predicts conflict and dysfunction. Extraversion is important for teams that need to be outward-facing (client work, sales, external relations), but highly extraverted teams may generate more interpersonal conflict than balanced ones. The presence of even one high-Openness individual significantly increases a team’s creative output — sometimes called the “creative catalyst” effect. Understanding these dynamics is valuable for both selecting teams and managing the interpersonal dynamics that emerge from personality differences. Collaborative project tools can partially compensate for team-level weaknesses in Conscientiousness by providing external structure.

Can the Big Five Personality Traits Change? What the Evidence Says

One of the most practically important questions about the Big Five personality traits — and one of the most frequently misunderstood — is whether they can change. The short answer is: yes, meaningfully, but not easily or quickly. Understanding the evidence here prevents two common errors: treating personality as entirely fixed (giving up on self-improvement) or treating it as infinitely malleable (expecting rapid wholesale change from personality apps or weekend workshops).

Rank-Order Stability vs. Mean-Level Change

Personality researchers distinguish between two types of stability. Rank-order stability means that your position relative to peers stays consistent — if you’re more extraverted than your cohort at 25, you’ll likely still be more extraverted than them at 45. This type of stability is high, peaking between ages 40 and 60. Mean-level change refers to systematic shifts in the absolute level of traits across populations over time — and here, change is well-documented. Research using longitudinal data shows that across adulthood, Conscientiousness and Agreeableness tend to increase, Neuroticism tends to decrease, and Openness and Extraversion show modest declines in later life. Psychologists call this pattern the maturity principle — personality systematically drifts in directions consistent with increasing social responsibility and emotional stability as people age. Understanding hypothesis testing is essential for evaluating personality research claims like these, which rely on longitudinal statistical analysis.

Deliberate Personality Change

A growing body of research examines whether people can deliberately change their personality traits. The short answer is: yes, to a meaningful degree, but it requires sustained behavioral change over months, not days. Research by psychologist Nathan Hudson at Southern Methodist University found that individuals who set specific behavioral goals aligned with their desired trait direction (e.g., a low-extraversion person committing to initiating one social interaction per day) showed measurable increases in self-reported and observer-rated trait scores over 15 weeks. Importantly, the key mechanism is actual behavioral change — simply wanting to change or believing you’ve changed produces much smaller effects. For students and professionals wanting to build more conscientious habits, the evidence points to systems-based behavioral interventions: building consistent homework and work routines is exactly the kind of behavioral scaffolding that can shift Conscientiousness scores over time.

Therapeutic Interventions and Neuroticism

Neuroticism is the trait most studied in the context of deliberate change, because of its clinical relevance. Cognitive Behavioral Therapy (CBT), one of the most extensively validated psychological treatments available, consistently reduces Neuroticism scores alongside its effects on specific anxiety and depressive disorders. A meta-analysis found that CBT produced effect sizes of approximately 0.5 standard deviations on Neuroticism reduction — a clinically meaningful shift. Mindfulness-based interventions also show moderate effects. For college students experiencing high anxiety and emotional volatility, these aren’t just therapeutic options — they’re evidence-based routes to improved academic performance through personality trait modification. The relationship between brain health and psychological states also illuminates why sustained cognitive and emotional challenges can affect personality expression over time.

Big Five Personality Traits and Mental Health: The Research Students Need to Know

The connection between Big Five personality traits and mental health is among the most practically consequential areas of personality research — especially for college students, who face some of the highest rates of anxiety and depression of any population group in the US and UK. Understanding how your trait profile relates to psychological vulnerability and resilience is not just academically interesting. It’s actionable knowledge for building a healthier, more effective version of your life.

Neuroticism as the Central Risk Factor

Across virtually every study examining personality and mental health, Neuroticism emerges as the dominant risk factor. High-neuroticism individuals are significantly more likely to experience anxiety disorders, major depressive disorder, PTSD, and general psychological distress. The mechanisms are well-understood: neurotic individuals perceive threats more readily, react to negative events more intensely, ruminate longer after setbacks, and recover more slowly from emotional disturbances. All of these patterns create conditions conducive to clinical-level mental health problems under stress. For students, this matters because the transition to college — new environments, academic pressure, social uncertainty, financial strain — is precisely the kind of multi-stressor context that activates neurotic tendencies at their most problematic. Balancing part-time work and academic assignments places particular demands on stress management — exactly where high-Neuroticism students need the most support.

Conscientiousness as a Protective Factor

If Neuroticism is the primary risk factor for mental health difficulties, Conscientiousness functions as one of the strongest protective factors. Research demonstrates that highly conscientious individuals tend to engage in health-promoting behaviors — regular exercise, adequate sleep, proper nutrition, adherence to medical and therapeutic recommendations — which collectively reduce both psychological and physical health risks. They are also more likely to follow through on therapeutic recommendations, maintain consistent therapy attendance, and build the structured routines that support emotional regulation. The relationship between Conscientiousness and mental health partly explains why behavioral activation — a core component of CBT for depression — works: by helping depressed individuals build conscientious routines, the therapy directly leverages the mental health protective functions of the trait. Effective memorization and study techniques build the kind of systematic routine that supports both Conscientiousness and academic mental health.

Openness, Extraversion, and Psychological Wellbeing

Research on Openness and mental health is nuanced. On one hand, high-Openness individuals show lower risk of certain cognitive decline conditions and tend to report higher psychological wellbeing associated with rich mental life, creativity, and meaning-making. On the other hand, very high Openness has been associated with greater susceptibility to unusual perceptual experiences and in some studies with higher rates of certain mood disorders — possibly because the same openness to experience that drives creativity also reduces psychological “filtering” of difficult internal states.

Extraversion shows consistent positive associations with subjective wellbeing and happiness — extraverts report higher positive affect and life satisfaction across cultures. The mechanism likely involves both greater social connection (a robust predictor of wellbeing) and the positive emotional reactivity that is a core facet of high Extraversion. However, extraverted individuals may also experience sharper drops in wellbeing when deprived of social connection — as during lockdowns, intensive study periods, or isolated work environments. Understanding your Extraversion level helps you design social environments that genuinely sustain your wellbeing rather than just surviving them.

Big Five vs. MBTI and Other Models: What Every Student Should Understand

Students in psychology, organizational behavior, and business programs frequently encounter multiple personality frameworks and are expected to evaluate their relative strengths. The Big Five personality traits are consistently favored by academic researchers over alternatives like the Myers-Briggs Type Indicator (MBTI), Enneagram, and DISC — but understanding why requires knowing what each framework actually claims and how it is supported.

Why Researchers Prefer the Big Five Over MBTI

The Myers-Briggs Type Indicator, developed by Isabel Briggs Myers and her mother Katharine Cook Briggs based on Carl Jung’s theory of psychological types, is one of the most widely used personality assessments in corporate settings — particularly in the US and UK — with estimates suggesting over 50 million administrations annually. Despite its commercial popularity, MBTI is heavily criticized in academic psychology for several structural reasons.

First, MBTI assigns people to discrete types (e.g., INFP, ENTJ) when the underlying dimensions it measures distribute continuously in the population — exactly like the Big Five dimensions. Forcing continuous distributions into binary categories loses information and misclassifies people near the cut-points. Second, MBTI shows poor test-retest reliability: significant percentages of test-takers receive different type classifications when retested even weeks later. Third, MBTI’s predictive validity for job performance, academic outcomes, and life satisfaction is substantially weaker than that established for the Big Five. The Big Five’s dimensional structure, empirical derivation, and extensive validity evidence make it the preferred framework for any serious research or professional application. Writing argumentative essays on competing personality models is a common assignment in psychology and organizational behavior courses — and the Big Five vs. MBTI debate is a strong topic for building evidence-based arguments.

The Enneagram and DISC: Useful or Scientific?

The Enneagram, a nine-type personality system with roots in spiritual traditions rather than empirical psychology, has gained significant popularity in popular culture and some organizational settings. While some recent research has begun exploring its psychometric properties, the Enneagram lacks the decades of validation evidence that supports the Big Five and shows considerable overlap with the Five Factor dimensions without clear added value. DISC (Dominance, Influence, Steadiness, Conscientiousness) is another popular organizational tool that maps loosely onto a subset of Big Five dimensions — particularly Extraversion and Conscientiousness — but like MBTI, uses categorical rather than dimensional assessment and has weaker validity evidence. For academic assignments, the Big Five FFM should be treated as the scientific standard against which these alternatives are compared.

The HEXACO Challenge to Big Five Comprehensiveness

The most scientifically serious challenge to the Big Five comes from the HEXACO model, which proposes that the five-factor structure misses a sixth genuine dimension — Honesty-Humility — that captures ethical character, anti-social behavior, and moral disposition aspects not fully covered by any of the Big Five traits. Research comparing Big Five and HEXACO models has shown that Honesty-Humility provides meaningful incremental validity in predicting ethical behavior, dark triad personality patterns, and civic behavior, beyond what the Big Five captures. For students writing about personality model limitations and future directions, HEXACO represents the most empirically grounded direction of extension to the Big Five framework. Writing a comprehensive literature review on personality models requires covering the HEXACO debate alongside the Big Five’s central role.

Essential Vocabulary and NLP Concepts for Big Five Personality Traits

Whether you’re writing a psychology assignment, preparing for an exam, or analyzing a workplace personality report, command of the vocabulary and conceptual architecture of the Big Five personality traits framework is essential. Here are the terms and ideas that consistently appear in academic and professional discussions of the OCEAN model.

Core Terminology

Five Factor Model (FFM) — the formal academic name for the Big Five framework; the term preferred in peer-reviewed literature. OCEAN / CANOE — mnemonic acronyms for the five dimensions. Lexical hypothesis — the founding theoretical premise that important personality traits are encoded in natural language. Factor analysis — the statistical method used to extract the five dimensions from large sets of personality descriptors. Facets — the more specific sub-traits within each domain (e.g., Openness contains sub-facets of Fantasy, Aesthetics, Actions, Ideas, and Values). NEO Personality Inventory — the most comprehensive validated instrument, measuring all five domains and 30 facets.

Heritability — the proportion of trait variation explained by genetic differences; approximately 50% for Big Five traits. Maturity principle — the empirical finding that Conscientiousness and Agreeableness increase and Neuroticism decreases systematically across adulthood. Rank-order stability — consistency of an individual’s relative standing on traits within their cohort over time. Mean-level change — systematic shifts in absolute trait levels across populations over time. Incremental validity — the degree to which a measure predicts outcomes beyond what is already predicted by other variables (e.g., personality predicting performance beyond intelligence).

Related NLP and LSI Keywords

Academic and professional discussions of the Big Five frequently deploy related conceptual vocabulary that signals depth of understanding: trait theory, personality dimensions, individual differences, self-report measures, observer-report personality, personality stability, behavioral genetics, cross-cultural personality, personality and performance, trait-criterion relationships, emotional intelligence, self-efficacy, intrinsic motivation, psychological resilience, stress tolerance, cognitive style, learning style, adaptive behavior, personality disorder, dark triad, narcissism, psychopathy, Machiavellianism, HEXACO, temperament, character, dispositional traits, situational factors, person-environment fit, vocational interest, Holland codes, Type A personality, emotional regulation, coping strategies.

Using this vocabulary precisely — not just dropping terms — is what signals genuine understanding to professors and employers. In an essay on the Big Five, for instance, connecting “Conscientiousness” to “goal-directed self-regulation,” “delay of gratification,” and “academic self-efficacy” demonstrates that you understand the construct at its full depth, not just its surface definition. Writing concisely and precisely is itself a high-Conscientiousness behavior that marks strong academic writing.

Frequently Asked Questions About the Big Five Personality Traits