In this study we are interested in the predictive incremental validity of a Q-sort on self image at work; the items are derived from the five factor model (FFM) used in addition to a test of general mental ability, Domino70. The grades obtained by a sample of 120 students were the criterion. The results confirm that the dimension of Conscientiousness shows good predictive position, as well as, more specifically the dimension of Agreeableness. We also show that the personological trait does not intervene directly on the level of academic success. It is mediated by a causal chain extending from the normative proximity or distance of self image to a prototype model created by professors, while the second mediating variable is the coherence of choices as compared to the FFM dimensions.
KEYWORDS: predictive validity, personality questionnaire, five factor model, implicative statistic analysis.