Synergy between callous-unemotional traits and aggression in preschool children: cross-informant and cross-cultural replication in the UK Wirral Child Health and Development Study, and the Colombian La Sabana Parent-Child Study

Although prospective studies find that CU traits increase risk for later aggression, children with CU traits but without aggression have been identified, implying that the incremental effect of CU traits may be evident only in the presence of aggression. We examined this hypothesis, seeking replication across same and cross-informant designs, and UK and Colombian samples. In a UK epidemiological cohort (WCHADS), CU traits and aggression were assessed at age 3.5, and aggression at 5.0 years by mother (N=687) and partner report (N=397). In a Colombian general population sample, CU traits were as... Mehr ...