The present study examined the incremental validity of four self-report measures of adolescent psychopathy [i.e., Antisocial Process Screening Device self-report version (APSD), Childhood Psychopathy Scale (CPS), Youth Psychopathic Traits Inventory (YPI), and the Inventory of Callous-Unemotional Traits (ICU)] with particular interest in their assessment of callous-unemotional (CU) traits in a sample of 279 (246 males, 33 females) at-risk adolescents (ages 16–18). Analogous subscales across the four measures were weakly to moderately interrelated with no evidence of a true gold-standard self-report assessment of CU traits. Results indicate that CU traits are a multifaceted construct, with specific CU dimensions predicting differential aspects of antisocial behavior. Most notably, callousness predicted aggression incrementally above other CU domains, but not other forms of antisocial behavior. The implications of a multi-dimensional conceptualization of CU traits are discussed.
