Validity of the Five Factor Personality Inventory (FFPI): An investigationin Italy

The Big; Five are nowadays the standard factors of personality dimensions. Several instruments have been proposed in the last few years for their meas urement, either with adjectives or with items. A new state-of-the-art quest ionnaire to measure the Big Five is the Five-Factor Personality Inventory ( FFPI), composed of: 100 items. For this article, the questionnaire was vali dated in Italy with a sample of 249 subjects. Generalizibility, reliability , construct validity (convergent and discriminant), and predictive validity were investigated. Particular attention was devoted to the fifth Factor, t he most debated in current literature. Results fully supported the validity of FFPI and testify to its high-level psychometric properties. The fifth f actor of the FFPI proved to be different from the standard definitions (Int ellect or Openness to Experience), being better characterized as Autonomy.