Recent efforts to improve access to evidence-based parent training programs using online delivery have largely neglected findings that young children with callous-unemotional (CU)-type conduct problems receive less benefit from parent training than children with conduct problems alone. The current study aimed to examine the moderating effect of child CU traits on efficacy and engagement outcomes associated with Internet-delivered Parent-Child Interaction Therapy (iPCIT) versus standard, clinic-based PCIT. Forty families (57.6% non-Hispanic Caucasian) with a 3-5 year-old (M = 3.95 years, SD = 0.9; 83.5% boys) child with a disruptive behavior disorder were randomized to either iPCIT or clinic-based PCIT. Families participated in four assessments across time; child conduct problems, global functioning and treatment responder status, and parent-rated treatment satisfaction were measured. Analyses revealed that the negative influence of CU traits on functional gains was not uniform across treatment formats. Specifically, the detrimental effect of CU traits on functional gains was significantly more pronounced among children treated with iPCIT than clinic-based PCIT. CU traits also predicted lower parental treatment satisfaction across delivery formats, but this effect was more pronounced among iPCIT parents. In contrast, CU traits did not moderate differential effects across iPCIT and clinic-based PCIT for conduct problem severity or treatment response status. Findings suggest that iPCIT is a promising treatment option for early conduct problems, particularly when access-to-care barriers exist, but that further research is needed to determine whether strategic adaptations to online programs can more optimally address the distinct needs of children with clinically significant CU traits.
Keywords: Callous-unemotional traits; Conduct problems; Internet-based treatment; Moderators; Parent training.