The NEO Inventories1
DOI link for The NEO Inventories1
The NEO Inventories1 book
The NEO Personality Inventory–Revised (NEO-PI-R; Costa & McCrae, 1992b) and its variations are questionnaire measures of a comprehensive model of general personality traits, the Five-Factor Model (FFM; Digman, 1990), or “Big Five.” The NEO-PI-R and a slightly simplified NEO-PI-3 (McCrae & Costa, 2010; McCrae, Costa, & Martin, 2005) consist of 240 items that assess 30 specific traits, which in turn define the five factors: Neuroticism (N), Extraversion (E), Openness to Experience (O), Agreeableness (A), and Conscientiousness (C). The NEO Five-Factor Inventory-3 (NEO-FFI-3; McCrae & Costa, 2010) consists of selections of 60 of the items that assess only the five factors. Responses use a five-point Likert scale, from strongly disagree to strongly agree. Both self-report (Form S) and observer rating (Form R) versions have been validated and extensively used (Costa & McCrae, 1992b).