Introduction: What Is the BFI-2?
The BFI-2 (Big Five Inventory-2) is an upgraded version of the widely-used Big Five personality measure, developed by psychologists Christopher J. Soto and Oliver P. John and published in 2017. Both researchers are affiliated with the Personality and Social Psychology Laboratory at the University of California, Berkeley, and Oliver P. John is among the most influential figures in the Big Five research tradition. His original BFI, published in 1991 and 1999, has been employed in thousands of studies worldwide.
The BFI-2 consists of 60 items rated on a 5-point Likert scale (1 = Disagree Strongly, 5 = Agree Strongly), asking respondents to describe their typical behaviors and feelings through self-report. It measures the five basic dimensions of the Big Five personality theory: Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism (also referred to as Negative Emotionality in the BFI-2 framework).
The importance of the BFI-2 lies not only in its continuity with the original instrument's brevity and practicality, but in its systematic improvements based on years of psychometric feedback from the research community. It has become one of the most respected self-report measures in contemporary personality assessment.
Theoretical Foundations: The Big Five Framework
The Big Five personality theory represents the most widely accepted taxonomic framework in contemporary personality psychology. Its core premise is that individual differences in personality can be described along five broad dimensions that capture the most important aspects of human variation. This framework did not emerge from a single theorist but rather accumulated over decades of lexical research and factor analysis.
The lexical hypothesis posits that the most salient personality traits become encoded in natural language over time. Following this logic, researchers extracted thousands of personality-descriptive terms from dictionaries and repeatedly refined them through factor analysis, eventually converging on five stable dimensions. This convergence was independently replicated by Norman (1963) using military samples and by Goldberg (1990) in his landmark lexical studies, demonstrating remarkable replicability across samples and methods.
A further strength of the Big Five model is its cross-cultural robustness. Extensive studies conducted across diverse cultures—including Chinese, Japanese, German, and Turkish samples—have successfully reproduced the five-factor structure, indicating that the Big Five captures universal patterns of human personality rather than language-specific artifacts. McCrae and Costa's NEO-PI-R represents another well-known measurement system based on the same framework, while the BFI-2 achieves reliable measurement of the same structure with a more concise item set.
Dimension-by-Dimension Interpretation
Openness
Openness reflects the tendency to engage with novel ideas, abstract thinking, and diverse experiences. Individuals high in openness tend to be curious, imaginative, and receptive to art, adventure, and unconventional ideas, exhibiting more flexible cognitive styles. Those low in openness prefer tradition, familiarity, and predictability, gravitating toward routine over change. The BFI-2 breaks openness into three facets: Intellectual Curiosity, Aesthetic Sensitivity, and Creative Imagination.Conscientiousness
Conscientiousness captures individual differences in self-control, organization, and goal-directed behavior. Highly conscientious individuals are typically orderly, responsible, planful, and persistent, effectively regulating impulses in pursuit of long-term objectives. Less conscientious individuals tend to be more spontaneous and disorganized, often struggling with task completion and time management. Among all Big Five dimensions, conscientiousness is the most consistently robust predictor of life outcomes—significantly correlated with academic achievement, job performance, health behaviors, and even longevity. Its three facets are Organization, Productiveness, and Responsibility.Extraversion
Extraversion describes the quantity and intensity of social engagement and the tendency to seek stimulation from the external world. High extraverts are warm, talkative, and sociable, often gravitating toward high-stimulation environments and becoming focal points in group settings. Low extraversion (often termed introversion) is characterized by a preference for quiet, solitude, or deep one-on-one exchanges, with less appetite for intense social stimulation. It is important to note that introversion is not equivalent to social anxiety or shyness—introverts can be socially skilled while simply preferring lower levels of social investment. The BFI-2 facets are Sociability, Assertiveness, and Energy Level.Agreeableness
Agreeableness reflects individual differences in cooperation and interpersonal harmony. Highly agreeable individuals are warm, trusting, and cooperative, inclined toward compromise and forgiveness in conflict. Those low in agreeableness tend to be more skeptical and competitive, prioritizing their own positions in disputes, and may be perceived as cold or argumentative. Agreeableness plays a critical role in teamwork, prosocial behavior, and relationship quality. Its three facets are Compassion, Respectfulness, and Trust.Neuroticism / Negative Emotionality
Neuroticism captures the tendency to experience negative emotions and the stability of one's emotional regulation. Individuals high in neuroticism are prone to anxiety, depression, irritation, and mood swings, reacting more intensely to daily stressors and recovering more slowly from negative affect. Those low in neuroticism (high emotional stability) tend to be calm, even-tempered, and resilient under pressure. The BFI-2 adopts the label "Negative Emotionality" to more precisely describe the core of this dimension. Its three facets are Anxiety, Depression, and Emotional Volatility.Key Improvements Over the Original BFI
The BFI-2 is not merely a lengthened version of the original inventory but incorporates three systematic improvements addressing known limitations of the BFI-1.
First, item quality was systematically optimized. Several items in the original 44-item BFI showed suboptimal factor loadings or cross-loadings on unintended dimensions—particularly within the Openness and Agreeableness scales. Soto and John (2017) conducted a thorough review of the original item pool, removed poorly performing items, and introduced new items with clearer behavioral anchors and more precise wording. The final 60-item set substantially reduces response ambiguity and improves each dimension's coverage.
Second, the hierarchical facet structure was formally introduced. The original BFI provided only five domain scores, leaving finer-grained personality nuance unmeasured. The BFI-2 introduces three facet-level scales for each domain, creating a "5 domains × 3 facets = 15 facets" hierarchical structure. This design addresses a critical limitation: domain scores can mask important within-domain heterogeneity. Two individuals may obtain identical Conscientiousness scores—one scoring very high on Organization but moderate on Responsibility, the other showing the opposite pattern—yet behave quite differently. Facet-level measurement makes such distinctions possible.
Third, psychometric performance was broadly improved. Compared with the original BFI, the BFI-2 demonstrates substantially stronger internal consistency (Cronbach's α mostly reaching or exceeding 0.80 across domains), superior confirmatory factor analysis fit indices (CFI, RMSEA, SRMR), and confirmed measurement invariance across gender and age groups, ensuring fair comparison across diverse populations.
Applications: Who Should Take the BFI-2
The BFI-2 is used across a wide range of settings, including academic research, career development, and educational guidance.
In research contexts, the BFI-2 has been widely adopted for studying relationships between personality traits and consequential outcomes such as well-being, health behavior, academic performance, and occupational success. Its strong psychometric properties also make it an efficient measure for laboratory studies and large-scale surveys.
In career development and organizational settings, the BFI-2 can help individuals understand the trait foundations of their work style. Conscientiousness is a well-established predictor of job performance across most occupations, while Extraversion shows incremental validity in sales and managerial roles. Understanding one's profile across both domain and facet levels can inform career choices and development planning.
In educational settings, teachers and school psychologists can use BFI-2 results to help students better understand themselves. The robust predictive relationship between Conscientiousness and academic achievement, as well as the links between Openness and creative thinking, offer practical insights for educational guidance.
For the general public, the BFI-2 provides a reliable starting point for self-exploration. It does not offer categorical "type" labels but rather continuous scores reflecting personality dimensions—consistent with the modern view that personality traits are normally distributed in the population rather than falling into discrete bins.
Take the Free Test on CheckPsych
If you would like to explore your own Big Five personality profile, you can complete the BFI-2 online test free of charge on the CheckPsych platform.
Visit: https://www.checkpsych.com/tests/bfi2/
This version faithfully adapts the original instrument by Soto and John (2017) into a fully translated and validated format. It includes all 60 items, and upon completion you will receive your domain-level scores along with brief interpretive guidance. Please complete the test in a quiet environment, responding honestly with the option that best reflects your typical feelings and behaviors.
Psychometric Properties: Reliability and Validity
Since its publication, the psychometric quality of the BFI-2 has been confirmed across multiple independent samples. The following summarizes key indicators based on data reported in the original publication by Soto and John (2017).
Internal Consistency
In the primary development sample (N = 1,400), Cronbach's alpha coefficients for the five domains were: Openness 0.83, Conscientiousness 0.85, Extraversion 0.86, Agreeableness 0.82, and Neuroticism 0.87—all falling within the good to excellent range. The 15 facet scales showed alpha coefficients between 0.65 and 0.82, which is acceptable given that each facet is measured by only 4 items.
Test-Retest Reliability
Over a three-month retest interval, stability coefficients for the domain scores ranged from 0.76 to 0.84, indicating satisfactory temporal stability. Facet-level retest reliabilities were somewhat lower (0.66–0.80), yet still within acceptable psychometric limits.
Structural Validity
Confirmatory factor analyses supported the BFI-2's hierarchical structure: both the five-factor model (domains as first-order factors) and the 15-facet structure (five domains each with three facets) yielded acceptable fit. Importantly, measurement invariance across gender and age groups was established, supporting fair use across diverse populations.
Criterion-Related Validity
Domain scores from the BFI-2 showed strong convergent correlations with corresponding dimensions from established Big Five instruments such as the NEO-PI-R (r = 0.80–0.90). Associations with external criteria—including mental health indicators, academic performance, and social support—followed theoretically expected patterns, providing support for the instrument's criterion validity.
References
Soto, C. J., & John, O. P. (2017). 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
John, O. P., & Srivastava, S. (1999). The Big Five trait taxonomy: History, measurement, and theoretical perspectives. In L. A. Pervin & O. P. John (Eds.), *Handbook of personality: Theory and research* (2nd ed., pp. 102–138). Guilford Press.
Denissen, J. J. A., Geenen, R., van Aken, M. A. G., Gosling, S. D., & Potter, J. (2008). Development and validation of a Dutch translation of the Big Five Inventory (BFI). *Journal of Personality Assessment*, *90*(2), 152–157. https://doi.org/10.1080/00223890701845229
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Disclaimer: This article and the associated test are for general informational and educational purposes only and do not constitute a clinical diagnostic tool. Personality assessment results cannot replace a professional mental health evaluation. If you are experiencing significant emotional distress or psychological difficulties, please seek help from a qualified mental health professional.