The Five-Factor model is one of the most popular models of general personality, but recently a competing model, the HEXACO, has been put forth as an alternative. This study compared the two models by examining the interrelations between their primary measures, the Revised NEO Personality Inventory (NEO PI-R) and the Revised HEXACO Personality Inventory (HEXACO-PI-R), and their relations with psychopathy and externalizing behaviors in a sample of undergraduates. Results revealed good convergence between conceptually related personality traits. Both inventories accounted for substantial proportions of variance in psychopathy scores although the HEXACO-PI-R accounted for larger proportions and manifested greater incremental validity. The findings are discussed in relation to the trait of fearlessness, which appears to be unique to the HEXACO-PI-R. The results suggest that both measures assess psychopathy-related traits, but the HEXACO-PI-R offers a slight advantage. Neither measure was successful at longitudinally predicting externalizing behavior when controlling for previous antisocial behavior.
