NEO Five-Factor Inventory (NEO-FFI-60), Form S

Overview

The NEO Five-Factor Inventory (NEO-FFI-60), Form S is a concise self-report psychometric instrument developed by Costa and McCrae to assess the five major dimensions of personality as described by the Five-Factor Model (FFM), also known as the Big Five model of personality. It represents the abbreviated version of the NEO Personality Inventory-Revised (NEO PI-R) and provides a rapid yet comprehensive assessment of stable personality traits that influence cognition, emotion, motivation, and behavior throughout the lifespan.

The Five-Factor Model is one of the most extensively validated theories of personality in contemporary psychology and has demonstrated remarkable cross-cultural stability and predictive validity. The NEO-FFI-60 measures five broad personality domains—Neuroticism, Extraversion, Openness to Experience, Agreeableness, and Conscientiousness—which collectively describe the major dimensions of normal personality. Owing to its strong theoretical foundation and excellent psychometric properties, the instrument has become one of the most widely used personality assessments in clinical psychology, psychiatry, organizational psychology, educational research, health sciences, behavioral medicine, and personality research.

Objective

The primary objective of the NEO Five-Factor Inventory (NEO-FFI-60) is to provide a reliable, valid, and efficient assessment of the five fundamental dimensions of personality, enabling researchers and clinicians to evaluate stable individual differences that influence psychological functioning and behavioral outcomes.

More specifically, the NEO-FFI-60 is designed to:

  • Assess the five broad domains of personality according to the Five-Factor Model.
  • Generate an individual personality profile based on standardized personality traits.
  • Support psychological assessment, counseling, and clinical decision-making.
  • Investigate associations between personality traits and mental health, physical health, academic achievement, occupational performance, and interpersonal functioning.
  • Facilitate research across diverse cultural, educational, occupational, and clinical populations.

Scale Structure

The NEO-FFI-60 consists of 60 self-report items, with 12 items allocated to each of the five personality domains. Respondents indicate the degree to which each statement describes them using a 5-point Likert response scale, ranging from:

  • 0 = Strongly Disagree
  • 1 = Disagree
  • 2 = Neutral
  • 3 = Agree
  • 4 = Strongly Agree

The questionnaire assesses the following five personality dimensions:

  • Neuroticism (N): Emotional instability, anxiety, vulnerability to stress, negative emotionality, and emotional reactivity.
  • Extraversion (E): Sociability, assertiveness, positive affect, activity level, enthusiasm, and interpersonal engagement.
  • Openness to Experience (O): Intellectual curiosity, imagination, creativity, aesthetic appreciation, flexibility, and openness to novel ideas and experiences.
  • Agreeableness (A): Compassion, trust, altruism, cooperativeness, empathy, and interpersonal warmth.
  • Conscientiousness (C): Organization, responsibility, persistence, self-discipline, goal orientation, and reliability.

Each domain is scored independently, providing a multidimensional personality profile rather than a single overall personality score.

Applications

The NEO-FFI-60 is among the most widely applied personality instruments in clinical psychology, psychiatry, counseling psychology, organizational psychology, educational psychology, occupational health, behavioral medicine, neuroscience, epidemiology, and social science research. It is appropriate for adolescents, university students, adults, and older adults, and may be administered individually or in group settings.

In clinical practice, the instrument assists psychologists and mental health professionals in understanding enduring personality characteristics that may influence psychological disorders, treatment engagement, emotional regulation, coping strategies, and interpersonal functioning. Within organizational settings, it is frequently used to examine leadership, work performance, job satisfaction, teamwork, occupational stress, and career development. In educational research, the NEO-FFI-60 has been associated with academic achievement, learning styles, motivation, and student adjustment. Furthermore, the inventory has become an essential research tool for investigating the role of personality in physical health, health-related behaviors, resilience, quality of life, life satisfaction, aging, and numerous psychiatric and medical conditions.

Scoring and Psychometric Evaluation

Each item is rated on a 5-point Likert scale, and responses are summed according to the scoring key to produce five independent personality domain scores. Several items are reverse scored to control for acquiescence bias and improve measurement accuracy. Raw scores may subsequently be converted into standardized normative scores, allowing comparison with reference populations. Separate normative data are commonly available for men, women, and student populations, facilitating more accurate interpretation.

Extensive psychometric evaluation has demonstrated that the NEO-FFI-60 possesses strong construct validity, criterion validity, convergent validity, and discriminant validity across numerous languages and cultural settings. Internal consistency coefficients reported by Costa and McCrae (1992) range from Cronbach’s α = 0.64 to 0.85, indicating satisfactory to good reliability across the five personality domains. The inventory has also shown excellent temporal stability, supporting its use as a measure of relatively stable personality traits. The Greek adaptation, translated by Dimitriadou and Stalikas using the independent back-translation procedure, has demonstrated satisfactory psychometric performance and has been successfully employed in both clinical and research settings.

Interpretation

Higher scores on each domain indicate a stronger expression of the corresponding personality trait. Individuals with high Neuroticism tend to experience greater emotional instability and vulnerability to stress, whereas low Neuroticism reflects emotional stability and resilience. High Extraversion indicates sociability, assertiveness, and positive emotionality, while lower scores reflect introversion and reserved interpersonal behavior. High Openness to Experience characterizes individuals who are intellectually curious, imaginative, and receptive to new ideas, whereas lower scores indicate preference for familiarity and conventional thinking. High Agreeableness reflects empathy, trust, cooperation, and compassion, while lower scores may indicate greater competitiveness or skepticism. Finally, high Conscientiousness is associated with organization, persistence, responsibility, and self-discipline, whereas lower scores suggest greater spontaneity, flexibility, or reduced goal-directed behavior.

Because personality dimensions interact to shape individual behavior, interpretation should consider the complete personality profile rather than isolated domain scores. The NEO-FFI-60 provides valuable information for understanding individual differences in emotional functioning, interpersonal relationships, occupational performance, health behaviors, and psychological adjustment.

References

Costa, P. T., Jr., & McCrae, R. R. (1992). Revised NEO Personality Inventory (NEO PI-R) and NEO Five-Factor Inventory (NEO-FFI) Professional Manual. Odessa, FL: Psychological Assessment Resources.

McCrae, R. R., & Costa, P. T., Jr. (2004). A contemplated revision of the NEO Five-Factor Inventory. Personality and Individual Differences, 36(3), 587–596.

Costa, P. T., Jr., & McCrae, R. R. (2008). The Revised NEO Personality Inventory (NEO-PI-R). In G. J. Boyle, G. Matthews, & D. H. Saklofske (Eds.), The SAGE Handbook of Personality Theory and Assessment (Vol. 2, pp. 179–198). Sage Publications.

Dimitriadou, D., & Stalikas, A. Greek adaptation of the NEO Five-Factor Inventory (NEO-FFI). (Greek translation using the independent back-translation procedure).