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	Big Five Inventory	Inventario NEO di Personalità
Campo	Psicologia sociale	Psicologia sociale
Famiglia	Process / pipeline	Process / pipeline
Anno di origine	1991	1992
Ideatore	Oliver John, Donahue, and Kentle	Paul Costa and Robert McCrae
Tipo	Big Five personality trait inventory	Self-report personality questionnaire
Fonte seminale	John, O. P., Donahue, E. M., & Kentle, R. L. (1991). The Big Five Inventory—versions 4a and 54. Technical Report, Institute of Personality and Social Research, University of California, Berkeley.	Costa, P. T., & McCrae, R. R. (1992). Revised NEO Personality Inventory (NEO PI-R) and NEO Five-Factor Inventory (NEO-FFI) professional manual. Psychological Assessment Resources.
Alias	BFI, Big Five Personality Inventory, Five-Factor Model	NEO PI-R, Costa and McCrae Personality Inventory
Correlati	3	3
Sintesi	The Big Five Inventory (BFI) is a 44-item self-report measure operationalizing the Five-Factor Model of personality, capturing Openness, Conscientiousness, Extraversion, Agreeableness, and Neuroticism. Developed by Oliver John and colleagues in 1991, the BFI is a more concise alternative to longer personality instruments while maintaining strong psychometric properties. The measure has become one of the most widely used personality assessments in organizational, clinical, social, and personality psychology research.	The NEO PI-R is a comprehensive 240-item self-report personality assessment that measures five major personality dimensions and thirty lower-order facets. Developed by Paul Costa and Robert McCrae in the early 1990s, it operationalizes the Five-Factor Model of personality—one of the most empirically validated trait taxonomies in psychological science. The measure has become the gold standard for personality assessment in clinical, research, and occupational settings.