Big Five Aspect Scales: What the 10-Aspects Personality Measure Assesses

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Author: Ukrainian Psychological Hub · Published: October 9, 2026 · Editorial Policy

The Big Five Aspect Scales (BFAS) is a 100-item personality questionnaire that measures five broad Big Five personality domains and ten more specific aspects—two aspects within each domain. It was developed by Colin G. DeYoung, Lena C. Quilty, and Jordan B. Peterson to capture meaningful differences that broad five-domain scores can conceal. The instrument distinguishes, for example, a person who is highly assertive from someone who primarily displays enthusiasm, even though both characteristics contribute to Extraversion.

The BFAS was introduced in the landmark 2007 validation study, which investigated structure between broad personality domains and narrower facets. It provides a research-based way of describing patterns of self-reported tendencies; results are continuous scores interpreted within a particular measurement and comparison context.

What are the Big Five Aspect Scales?

The Big Five Aspect Scales measure habitual patterns of feeling, thinking, and behaving using a hierarchical model of personality. Five domains summarize broad tendencies, while each pair of aspects separates psychologically meaningful components of the same domain. The result is a five-domain, ten-aspect profile, rather than a ten-type system or ten independent kinds of people.

The full questionnaire contains 100 self-report statements, with ten items assigned to each aspect and twenty to each domain. Responses generally indicate how accurately a statement describes the respondent. Some items are reverse-keyed so that the direction of the final score consistently reflects the intended construct. The instrument was developed using correlations with the International Personality Item Pool (IPIP), followed by evaluation in an independent sample. The authors' research laboratory identifies the BFAS as a public-domain measure and provides resources for self- and peer-ratings.

Readers who want the complete framework can start with the Big Five personality traits. The hierarchy itself—domains, aspects, and narrower facets—has its own explanation in Big Five Domains, Aspects, and Facets. This article concentrates on the BFAS instrument, its ten particular aspect labels, and how its results should be understood.

The ten BFAS aspects at a glance

The following pairings belong to the BFAS model. Their names and boundaries are instrument-specific; other Big Five inventories organize narrower traits differently.

Openness/Intellect: Openness and Intellect

Openness describes receptivity to imagination, aesthetics, perceptual richness, and experience involving art, beauty, and reflection. Intellect describes engagement with abstract ideas, complex information, reasoning, and intellectual exploration. The BFAS domain label Openness/Intellect makes the distinction especially explicit.

Conscientiousness: Industriousness and Orderliness

Industriousness concerns persistent effort, productive engagement, task initiation, and working toward goals. Orderliness concerns preferences for structure, organization, tidiness, and predictable arrangements. High effort and high organization often travel together, but they can diverge within the same individual.

Extraversion: Enthusiasm and Assertiveness

Enthusiasm describes positive social engagement, warmth, excitement, and enjoyment of interaction. Assertiveness describes social agency, taking initiative, speaking up, and readiness to influence a situation. A person may be socially warm without being particularly dominant, or decisive without seeking extensive social contact.

Agreeableness: Compassion and Politeness

Compassion concerns sympathy, concern for others, and emotional responsiveness to their needs. Politeness concerns restraint in interpersonal conflict, respect for boundaries and conventions, and reluctance to impose on other people. These aspects distinguish care-oriented tendencies from interpersonal inhibition and deference.

Neuroticism: Withdrawal and Volatility

Withdrawal concerns tendencies toward anxiety, self-doubt, discouragement, and vulnerability to perceived threat. Volatility concerns irritability, emotional reactivity, and shifts toward anger or agitation. Their grouping within Neuroticism reflects the BFAS structure; domain-specific clinical and developmental interpretation remains with the English Hub's separate Neuroticism materials.

These ten descriptions are interpretive summaries of the constructs measured by questionnaire items, grounded in the original BFAS development paper and the researchers' published scoring keys. They describe degree and typical pattern rather than fixed labels or evaluations of character.

Why measure two aspects instead of just five domains?

A broad trait score is useful because it summarizes substantial common variation across behaviors and experiences. But summary scores inevitably compress distinctions. Two people with similar Conscientiousness averages can differ considerably in effort and organizational preference. Likewise, a moderate Extraversion total can reflect two moderate subscales or a striking contrast between high Assertiveness and lower Enthusiasm.

The original research asked whether there was a reproducible structural level between the five domains and numerous narrower facets. In the Eugene–Springfield community sample of 481 people, factor analyses of 75 facet scales from two major inventories suggested two related components within each broad domain. The researchers then drew on item correlations to construct the 100-item BFAS, evaluating it in a second sample of 480 participants. Those are important development and initial validation steps, reported in DeYoung, Quilty, and Peterson (2007); they do not establish that every personality inventory or every cultural population must reproduce exactly the same hierarchy.

The reason to use aspect scores is increased descriptive precision. Researchers can ask more focused questions about patterns that broad domains may obscure. In a study of interpersonal tendencies, for example, Assertiveness and Enthusiasm may relate differently to social behavior. A 2013 study examined the interpersonal relationships of Extraversion and Agreeableness aspects rather than assuming that each entire domain functions as a single uniform tendency.

The cost of more detailed measurement is complexity: narrower scores typically represent fewer items or less heterogeneous content, can be sensitive to measurement noise, and require more cautious interpretation when translated into applied decisions. The useful level of detail is determined by the question, sample, evidence, and quality of the actual scale.

How the BFAS was developed

The BFAS grew out of the Big Five trait tradition and research into hierarchies of narrower personality characteristics. The investigators combined facet-scale information from the NEO PI-R and the Abridged Big Five Circumplex. Their analysis yielded a paired structure within each of the five domains. They then identified questionnaire items strongly related to these latent components and built an instrument with ten items per aspect.

The original article links aspect scores to prior behavior-genetic findings, describing an intriguing correspondence. That result suggested hypotheses about distinct biological influences; it did not identify a unique brain region, neurotransmitter, gene, or causal neural mechanism for any one aspect. Genetic correspondence and questionnaire factor structure are different levels of evidence.

An important historical distinction follows: the BFAS is a particular measurement instrument designed to operationalize the ten-aspect model. It is not identical to the Five-Factor Model itself, and the appearance of ten aspects in this model does not establish a universal law that the Big Five always have exactly ten lower-order components.

A closer interpretation of each BFAS aspect

Openness: aesthetic and experiential receptivity

Higher Openness scores can indicate stronger engagement with imaginative or aesthetic experience, nuanced perception, and emotional or sensory qualities of music, art, and nature. Lower scores may indicate less interest in those particular experiences. A person can enjoy traditional art, prefer familiar cultural forms, or approach a problem pragmatically while showing a different pattern on the Intellect aspect.

The name Openness here refers to one BFAS aspect and also resembles the common name of the overall Big Five domain. The BFAS explicitly separates aspect-level Openness from the companion aspect Intellect. Interpreting a result requires identifying which level the report displays.

Intellect: engagement with ideas

The BFAS Intellect aspect concerns self-reported ease with complex ideas, understanding, verbal and abstract engagement, and an inclination toward cognitively demanding material. It is related in content to intellectual confidence and engagement, but a questionnaire score does not equal a standardized IQ test score. It cannot establish a person's intellectual capacity, educational potential, or cognitive diagnosis.

The distinction is especially important because people may understate or overstate their ability in self-report, and intellectual curiosity is expressed differently depending on opportunity, training, and context. For direct measurement of cognitive ability, use a suitable assessment developed and validated for that purpose.

Industriousness: effort and persistence

Industriousness describes willingness to invest effort, remain involved in demanding activity, carry tasks forward, and work consistently toward goals. A person may be persistent in personally meaningful activities while struggling in unstructured or exhausting settings; interpreting a score should take the context of the respondent's recent circumstances into account.

A lower score is not evidence of laziness, and a higher score is not proof of exceptional job performance. Demands, resources, health, incentives, and task fit all affect observed behavior. If the practical interest is functioning at work, trait scores should be considered alongside task-relevant evidence.

Orderliness: structure and organization

Orderliness concerns preference for neatness, planning, regularity, and organized surroundings. It helps explain why diligent people vary in how much structure they maintain. Someone can complete demanding work through improvisation while being relatively unconcerned with tidy routines. Another person may strongly prefer orderly systems while finding sustained effort more difficult.

Orderliness is a descriptive trait dimension. It does not measure obsessive-compulsive disorder, and a high score does not establish any clinical diagnosis. A tendency toward organization and a disorder characterized by clinically significant symptoms are assessed using different criteria and methods.

Enthusiasm: positive interpersonal engagement

Enthusiasm reflects positive emotion in social settings, warmth, excitement, and enjoyment of interpersonal involvement. It can help distinguish a friendly, socially engaged person from someone whose Extraversion arises more from influence and assertive behavior.

Lower Enthusiasm scores do not necessarily imply loneliness, unhappiness, or difficulty forming relationships. A satisfying social life can involve selective, quieter forms of connection. Self-report patterns describe relative tendencies, not the quality of any single relationship.

Assertiveness: social agency and influence

Assertiveness concerns expressing opinions, initiating action, taking charge, and exerting social influence. It overlaps in everyday language with confidence, but a BFAS score is best understood as a report of assertive interpersonal tendency rather than a certification of competence or leadership ability.

Interpreting Assertiveness requires attention to role and context. The same individual may take initiative in a familiar professional team but defer in an unfamiliar setting. Researchers have examined how this aspect relates to interpersonal behavior in the interpersonal circumplex, providing a more specific approach than treating overall Extraversion as uniform.

Compassion: sympathetic responsiveness

Compassion captures a tendency to recognize, care about, and respond emotionally to others' experiences. Its role within Agreeableness is connected to affiliation and interpersonal warmth, although self-reported compassionate feeling does not guarantee benevolent action in every situation.

A high score does not establish moral virtue, and a low score does not establish cruelty. Actual helping behavior depends on competing obligations, social expectations, capability, and circumstances. This is a measurement of reported personality tendencies, not a moral scale.

Politeness: restraint and interpersonal boundaries

Politeness describes avoiding unnecessary aggression, preserving social conventions, and restraining imposition on others. It differs from Compassion because an individual can be considerate in formal behavior while showing limited emotional responsiveness, or intensely caring yet unusually direct.

The term should not be interpreted as etiquette expertise or unquestioning obedience. Cultural norms strongly shape the outward expressions of courtesy, which is one reason translated and cross-cultural versions require local validation rather than simple word-for-word item substitution.

Withdrawal: threat sensitivity and discouragement

Withdrawal captures a self-reported tendency toward worry, emotional vulnerability, doubt, and discouragement. It belongs to the BFAS Neuroticism domain alongside Volatility. A person may report relatively elevated Withdrawal and less Volatility, a pattern that is obscured by a single domain average.

The score is not a measure of a specific anxiety or depressive disorder, does not establish clinical severity, and does not replace a clinical evaluation when symptoms warrant one. Its proper meaning is the measured tendency within this personality inventory.

Volatility: irritability and emotional reactivity

Volatility concerns the frequency or ease of emotional upset, irritability, and agitation. It captures a different expression of negative emotionality than Withdrawal. Both contribute to the broader Neuroticism domain, but a person with relatively high Volatility need not display the same level of fearfulness or self-doubt.

A Volatility result is not a diagnosis of a mood disorder, anger disorder, or any other clinical condition. The scientific question addressed by the questionnaire is a general trait tendency measured through self-description.

What does a BFAS test actually look like?

The original BFAS uses 100 statements. Participants indicate how accurately each statement describes them using the administered response options; a commonly documented version uses a five-point rating scale. Ten items contribute to each of ten aspect scores, and each domain is represented by its two aspect scales. Published research describes aspect scores as the average of their appropriately keyed items and domain scores as the average of paired aspects; see the BFAS methodological description in Weisberg et al. (2011).

The public BFAS scoring key shows positively and negatively keyed items. Reverse scoring matters: simply adding raw responses to every item can produce misleading results. An implementation also has to handle missing answers consistently with its stated scoring policy.

For illustration, a hypothetical respondent might average 4.2 on Assertiveness and 2.8 on Enthusiasm on a one-to-five response metric. An arithmetic mean of the two aspects would be 3.5 at the Extraversion domain level. The aspect difference is informative, but these invented values establish neither a percentile nor a categorical personality type. A response average is not automatically a percentile, a standardized score, or a population ranking.

The full questionnaire should not be confused with a ten-item test. BFAS has ten aspects, with ten items per aspect. A different brief instrument, the Ten-Item Personality Inventory, has ten items in total and a different intended level of measurement.

How should BFAS scores be interpreted?

First, identify the administered version. Was it the original 100-item self-report BFAS, a peer-report version, a translation, or a shortened adaptation? Check that its scoring key, language, normative reference, and validation evidence correspond to the actual questionnaire used.

Second, examine the domain and paired aspect scores together. A broad domain score supplies a high-level summary. Its aspects show whether that summary masks a contrast. The most informative feature of a profile may sometimes be the contrast between two components, although differences must be interpreted in light of scale reliability and measurement uncertainty.

Third, establish the scoring metric. A raw item mean, a sum, a standardized score, and a percentile describe different things. A raw mean of four on a five-point scale does not mean that the respondent is at the 80th percentile. Percentiles require an identified comparison group and an appropriate norming procedure. The English Hub explains this distinction further in Big Five Test Scores and Percentiles.

Fourth, avoid universal thresholds. No single BFAS score has an inherent global meaning of “high,” “low,” “normal,” or “abnormal” independent of the response scale, item keying, and comparison distribution. If a particular validated report defines interpretive bands for a specified norm sample, those bands belong to that report and population. They cannot be freely transferred to a different instrument.

Fifth, interpret the result as a tendency under measurement conditions. Responses can be affected by wording comprehension, social desirability, the person's frame of reference, current life conditions, and how carefully they answer. The result is one form of information about a person and should be discussed in conjunction with additional evidence when consequential decisions are involved.

BFAS vs BFI-2 vs NEO: important instrument differences

The Big Five Aspect Scales are one of several ways of measuring more-specific traits within broad Big Five domains. Their distinctive commitment is a two-aspect-per-domain structure. Instruments with different facet systems may cover overlapping content without sharing identical subscale labels.

BFAS: five domains and ten aspects

The original BFAS has 100 items, five domains, and ten aspects. Its lower-order scale names include Enthusiasm, Assertiveness, Compassion, Politeness, Industriousness, Orderliness, Withdrawal, Volatility, Intellect, and Openness. This is the hierarchy examined in DeYoung et al. (2007).

BFI-2: five domains and fifteen facets

The 60-item Big Five Inventory–2 measures five broad domains and three facets within each domain. For example, its Extraversion facets are Sociability, Assertiveness, and Energy Level; its Agreeableness facets include Compassion, Respectfulness, and Trust. Its domain nomenclature includes Negative Emotionality and Open-Mindedness. These categories belong to the BFI-2 and should not be presented as interchangeable with all BFAS aspect labels. See Soto and John (2017) and the English Hub's BFI and BFI-2 guide.

NEO inventories: model-specific domain and facet coverage

The longer NEO family includes instruments designed to measure five domains and narrower facet traits; the original NEO PI-R and the NEO-PI-3 represent six facets per domain, or 30 within that NEO framework. The short NEO-FFI family focuses on domain scores. This “30 facets” description belongs to the longer NEO instrument, not to an alleged universal Big Five structure. See the NEO Personality Inventory guide.

Different tools may correlate at the level of broad traits even where their lower-order scales partition personality differently. That is a matter for direct construct-validity evidence, not an excuse to rename scales mechanically. Choose the instrument that answers the actual research or assessment question.

Reliability and construct validity: what has been established?

The initial BFAS development studied substantial personality samples, reported coherent aspect scales, and supported a repeatable conceptual separation within the Big Five. In a later multi-sample study, internal consistency values for the ten aspects varied by sample and scale; the evidence generally supported their use for group research while illustrating why one global reliability value would be misleading. Weisberg, DeYoung, and Hirsh (2011) reported results from a Canadian sample, the Eugene–Springfield sample, and an online sample.

The later 2016 study relating BFAS to the Personality Inventory for DSM-5 found that lower-order pathological-trait markers could be examined alongside the ten aspects, with broad structural correspondences across two samples. This supports study of connections among trait frameworks; it does not make the BFAS a diagnostic test.

Reliability answers questions about how consistently a measure behaves under specified conditions. Construct validity concerns whether the resulting scores represent the intended personality attributes and relate to other variables in theoretically coherent ways. Evidence varies across groups and versions. Original validation results are a starting point; the intended population and any translation or modification require additional examination.

A useful caution comes from the difference between a ten-item scale within the full BFAS and a very brief questionnaire that measures an entire domain using a small number of questions. Shortening a measure can sacrifice detailed coverage. Soto and John (2017) examined such tradeoffs specifically for BFI-2 short forms, a separate instrument. Those numerical results should not be automatically transferred to a BFAS derivative.

Cross-cultural versions and translations

The Big Five has accumulated support in diverse languages and societies, while measurement invariance, local meaning of words, and specific lower-order structures require direct study. A translated BFAS item may retain the surface meaning of an English sentence but differ in cultural relevance, social desirability, or interpretation.

A 2024 study in Libyan Arabic-speaking adults investigated a locally adapted short BFAS, reporting support for its ten-aspect organization in a convenience sample. The study assessed an abbreviated version rather than establishing universal equivalence for the original 100-item English BFAS. Its recruitment, age distribution, sex distribution, item-selection process, and sample characteristics constrain generalization. The publication itself reports some differences in sample counts across sections, a further reason to rely on its particular analyses rather than a simplified headline claim.

For cross-language or cross-group comparisons, researchers should examine how items function, whether constructs have comparable structure, and whether group scores can be compared meaningfully. A measure validated in one setting cannot automatically be declared equivalent worldwide.

Can a BFAS result change over time?

Yes. A person might answer some items differently on another occasion because of ordinary response variability, changing circumstances, error, or durable trait development. These sources of change require different kinds of analysis. A higher score after an intervention does not by itself demonstrate that the intervention caused a lasting personality change.

The BFAS was created primarily as a measure of trait tendencies. A momentary state—for instance being unusually impatient today—is conceptually distinct from a person's characteristic level of irritability over time. The distinction matters when interpreting questionnaires administered during stressful transitions, illness, or unusually demanding life periods.

A 2026 article on Big Five Aspect Adjectives developed an adjective-based approach to measuring aspects in both trait and state forms. That work is relevant to the broader research question, but it describes a separate instrument; it should not be represented as proof that the original 100-item BFAS is itself a momentary-state scale.

What can research do with the ten aspects?

Researchers can use the BFAS to investigate why two components of one domain show different relationships with another measured variable. A broad association between a domain and an outcome may conceal a stronger pattern for one aspect and a weaker or even opposite pattern for its companion aspect.

One illustration is a 2011 study of gender differences. The authors found that the aspect-level analysis displayed some differences that were obscured or reduced at the domain level. These are average patterns in the studied groups, with overlap between individuals; they cannot determine the personality profile of any one woman or man.

A second illustration is the relationship of Assertiveness, Enthusiasm, Compassion, and Politeness to interpersonal circumplex measures. Such studies allow a more detailed test of ideas about interpersonal behavior. They establish statistical patterns for sampled participants rather than causal laws about personal relationships.

The ten aspects may also be investigated in educational, occupational, health, and psychological science. Any claim about an outcome needs direct evidence for the exact score, sample, method, and endpoint studied. Even a replicated statistical association does not enable reliable prediction of a specific individual's future behavior without independently validated prediction models.

Can the BFAS diagnose a mental health condition?

No BFAS aspect score constitutes a diagnosis. Withdrawal, Volatility, Orderliness, and other questionnaire scores are normal-range personality constructs. Their names may resemble everyday descriptions of distress or rigidity, but clinical conditions are assessed through appropriate criteria, impairment, duration, differential assessment, and professional judgment.

Researchers can analyze associations between BFAS aspects and dimensions used in clinical research. For example, DeYoung and colleagues (2016) examined their relations to PID-5 traits. The presence of statistical associations does not convert the BFAS into an alternative diagnostic instrument.

When symptoms interfere with everyday functioning or create substantial distress, a qualified clinician can help evaluate the specific concern. Self-administered personality results can serve as conversation context, with their scientific scope clearly understood.

Advantages, constraints, and good use of the BFAS

The main advantage is a comprehensible middle level of detail. Five broad domains alone may be too coarse for questions about effort versus organization, warmth versus social agency, or threat sensitivity versus irritability. Ten aspects can sharpen hypotheses without demanding that readers interpret an exceptionally large list of narrow facets.

The principal constraints arise from self-report, sampling, language, item functioning, data quality, and the temptation to treat a descriptive score as a stable forecast. A public-domain questionnaire can be freely accessible while a particular translated, shortened, automatically scored, or commercial presentation may have additional methodological limitations. Availability alone does not certify scientific quality.

For researchers, good practice includes documenting the version, exact items, reverse-coding, handling of incomplete answers, scoring metric, sample characteristics, reliability for the current data, planned analyses, and limits of interpretation. Pre-registration and appropriate multiple-testing safeguards become useful when testing many separate aspect-outcome associations.

For individuals, BFAS scores are best used as a structured prompt for reflection: Do the paired aspects illuminate a pattern visible across different settings? Do reports from people who know the respondent provide similar information? Which situations make a tendency more or less apparent? These questions support interpretation without converting the questionnaire into a label.

For employers, educators, clinicians, and institutions, consequential decisions require independent evidence and legally and ethically appropriate assessment practices. A BFAS profile cannot substitute for direct evaluation of skills, performance, needs, or clinical symptoms.

Where can you find the original BFAS questionnaire and scoring key?

The DeYoung Personality Lab research page explains the BFAS and notes that the instrument is in the public domain, with resources for self-report and peer-report use. The IPIP BFAS scoring-key page provides the item-keying information and the original source citation. For scientific interpretation, read the 2007 development and validation paper alongside the relevant manual, version, and norms, where available.

Readers should verify that any web-based test actually reproduces the intended version and scoring algorithm. A website using the phrase “Big Five aspects” might present a shortened or modified questionnaire. Its public accessibility and polished scoring graphics do not establish equivalence to the original validated measure.

Frequently asked questions

Is BFAS the same as the Big Five personality test?

BFAS is one Big Five questionnaire. It assesses the five domains and divides each into two specific aspects. Other Big Five tests may measure just the domains or a different number and arrangement of narrower facets. The Big Five personality test guide explains the wider measurement landscape.

How many personality aspects does BFAS measure?

Ten: two for each of the five domains. The full BFAS contains 100 items. The number ten describes its modeled aspect structure, not a universal total of subtraits in human personality.

What are the ten BFAS aspect names?

Openness, Intellect, Industriousness, Orderliness, Enthusiasm, Assertiveness, Compassion, Politeness, Withdrawal, and Volatility. The pairs belong respectively to Openness/Intellect, Conscientiousness, Extraversion, Agreeableness, and Neuroticism.

What is the difference between an aspect and a facet?

An aspect is the middle level identified in the BFAS: a relatively broad lower-order component within a Big Five domain. A facet is often a more specific construct in an instrument's hierarchy. The terminology and counts depend on the model; they cannot be assigned universally across all tests.

Does the BFAS assess intelligence?

Its Intellect aspect concerns self-reported intellectual engagement and perceived capacity to handle ideas. It is not an IQ test, direct cognitive performance assessment, or educational diagnosis.

Is a higher aspect score always better?

No. Scores indicate relative standing on described tendencies within a defined metric or population. The usefulness of any tendency varies with context, demands, and goals, and the scale does not rank moral worth.

Can someone have high Assertiveness and low Enthusiasm?

Yes. The two aspects are correlated components of Extraversion but distinguishable. Such differences are part of the purpose of measuring aspects, provided the score contrast is larger than what measurement uncertainty can reasonably explain.

Can I compare BFAS scores directly with BFI-2 or NEO scores?

Not by equating raw numbers or assuming similarly named scales have identical meanings. Different instruments use different items, narrower-trait systems, score metrics, and normative samples. Formal score linking requires direct validation.

Is the BFAS validated for every country and language?

No single validation study establishes that conclusion. Researchers have evaluated the model in additional contexts, including a Libyan Arabic-speaking sample, but translation and population-specific evidence still matter.

Is the BFAS a clinical diagnostic tool?

No. It measures personality tendencies. Clinically significant symptoms require assessment with methods designed for the particular diagnostic question.

Does the BFAS predict behavior?

Aspect scores can be studied as statistical predictors of outcomes, but their predictive usefulness depends on the outcome, sample, design, and external validation. They do not determine a person's next decision, career success, relationship quality, or health trajectory.

What is the best reason to choose BFAS?

Choose it when the scientific or reflective question benefits from distinguishing two recognizable components of each Big Five domain, and when the original questionnaire's length and validation evidence suit the setting. For a different level of measurement, a different validated instrument may be more appropriate.

References

Ali, M., Jahan, A. M., & Abdelrahman, R. M. (2024). Measuring personality in Libyan Arabs: Validating the big five aspect scale with 10 factors domain. BMC Psychology, 12, 748. https://doi.org/10.1186/s40359-024-02270-y

DeYoung, C. G., Carey, B. E., Krueger, R. F., & Ross, S. R. (2016). Ten aspects of the Big Five in the Personality Inventory for DSM-5. Personality Disorders: Theory, Research, and Treatment, 7(2), 113–123. https://doi.org/10.1037/per0000170

DeYoung, C. G., Quilty, L. C., & Peterson, J. B. (2007). Between facets and domains: 10 aspects of the Big Five. Journal of Personality and Social Psychology, 93(5), 880–896. https://doi.org/10.1037/0022-3514.93.5.880

DeYoung, C. G., Weisberg, Y. J., Quilty, L. C., & Peterson, J. B. (2013). Unifying the aspects of the Big Five, the interpersonal circumplex, and trait affiliation. Journal of Personality, 81(5), 465–475. https://doi.org/10.1111/jopy.12020

DeYoung Personality Lab. (n.d.). Research: Between facets and domains; Big Five Aspect Scales and self-/peer-report resources. University of Minnesota. https://deyoung.psych.umn.edu/research

International Personality Item Pool. (n.d.). BFAS scoring keys. Oregon Research Institute. https://ipip.ori.org/BFASKeys.htm

Soto, C. J., & John, O. P. (2017a). The next Big Five Inventory (BFI-2): Developing and assessing a hierarchical model with 15 facets to enhance bandwidth, fidelity, and predictive power. Journal of Personality and Social Psychology, 113(1), 117–143. https://doi.org/10.1037/pspp0000096

Soto, C. J., & John, O. P. (2017b). Short and extra-short forms of the Big Five Inventory–2: The BFI-2-S and BFI-2-XS. Journal of Research in Personality, 68, 69–81. https://doi.org/10.1016/j.jrp.2017.02.004

Spark, A., Walker, S. A., O’Connor, P. J., & Jimmieson, N. L. (2026). Measuring personality states below the Big Five: Development and validation of the Big Five Aspect Adjectives for traits and states. https://doi.org/10.1177/27000710261467194

Weisberg, Y. J., DeYoung, C. G., & Hirsh, J. B. (2011). Gender differences in personality across the ten aspects of the Big Five. Frontiers in Psychology, 2, 178. https://doi.org/10.3389/fpsyg.2011.00178

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