Psychometric Properties of the Italian version of the Five-Dimensional Personality Test (5DPT)

We present the factor structure and the main psychometric properties of the Italian version of the Five Dimensional Personality Test (5DPT), a 100 item self-report questionnaire of personality constructed by D. van Kampen on the basis of the clinical and psychopathological literature and proposed by him as a theory-based and alternative measure of more or less the same dimensions as contained in the current Big Five model. It measures Extraversion (E), Neuroticism (N), Insensitivity (S), Orderliness (G) and Absorption (A). The questionnaire was translated into Italian by the back-translation method. Subjects were 877 males and 1103 females, aged 17-72 yrs. (mean = 25.95; s.d. = 11.39). All scale intercorrelations were low (<|.30|). Reliabilities were satisfactory, with Cronbach’s alphas ranging between .78 and .86. A factor analysis of the tetrachoric correlation matrix replicated the five-dimensional structure of the original form and showed no substantial correlation between factors (r ?.15). Factor invariance across external (age and gender) and internal (the scales themselves) parameters was satisfactory with Tucker’s phi coefficients ranging from .91 to .97. Globally the results are in line with van Kampen’s data on the original form of the 5DPT and support the factorial validity and reliability of its scales.