Parent management training (PMT) is an evidence-based treatment for children with problem behaviors, and is often considered to be the first choice of treatment. Though it may not be equally effective for all children, this is implied by the fact that up to one third of children continue to have considerable behavioral problems after treatment. Multiple moderators of treatment outcome have been considered. Callous-Unemotional traits (CU-traits) have been closely linked with serious antisocial behavior and conduct disorder. Children with CU-traits seem to be at risk for an especially negative development when it comes to antisocial behavior, and may go on to develop psychopathic traits as adults. This thesis reviews literature to examine the association between high levels of CU-traits in children and treatment outcomes of PMT interventions. A review of related studies shows evidence of worse treatment outcomes for these children. However, the results are not conclusive and more research is needed. Implications and directions for future research are also discussed.