Objective: Recent efforts to improve outcomes for young children with conduct problems and callous-unemotional (CU) traits involve adapting treatments to meet the unique needs of this subgroup. However, these efforts have ignored accumulating evidence for distinct primary and secondary variants within the CU subgroup. Existing treatment adaptations uniformly target risk factors associated with primary CU traits and no studies have investigated variant-specific patterns of responsiveness to treatment adaptations among young children with CU-type conduct problems. Method: Participants were 45 families with a 3- to 7-year-old clinic-referred child (M = 4.84 years, SD = 1.08, 84% boys) with conduct problems and CU traits. Primary and secondary CU variants were defined based on baseline parent-rated anxiety scores. All families received Parent-Child Interaction Therapy adapted for CU traits (PCIT-CU) at an urban university-based research clinic. Families completed five assessments measuring child conduct problems and affective outcomes. Results: Linear mixed-effects modeling showed that the rate and shape of change over time in conduct problems differed between variants, such that children with secondary CU traits showed deterioration in defiant and dysregulated behaviors from post-treatment to follow-up, whereas primary CU traits were associated with maintained gains. There were no variant differences in rate of improvement in CU traits. Affective empathy did not improve for either variant. Internalizing problems meaningfully improved by follow-up for children with secondary CU traits. Conclusions: Findings suggest that PCIT-CU is a promising intervention for children with conduct problems and primary CU traits, but may require further personalization for children with secondary CU traits. This trial was registered with the Australian New Zealand Clinical Trials Registry (ACTRN12616000280404).

Disruptive behavior disorders (DBD) are highly prevalent, emerge in early childhood, exhibit considerable stability across time, and are associated with profound disability. When DBD co-occur with callous-unemotional (CU) traits (i.e., lack of empathy/guilt), the risk of early-onset, stable, and severe disruptive behavior is even higher, relative to DBD alone. Early intervention is critical, and there is robust empirical support for the efficacy of parent management training (PMT) for reducing disruptive behavior in young children. However, broad access to these interventions is hindered by numerous systemic barriers, including geographic disparities in availability of services. To overcome these barriers and enhance access and quality of care to underserved communities, several PMT programs have been adapted to online delivery formats, including Parent-Child Interaction Therapy (PCIT). PCIT is an evidence-supported treatment that attempts to reduce disruptive child behavior by improving the parent–child relationship and implementing consistent and effective discipline strategies. Comer and colleagues proposed an online adaptation of PCIT (I-PCIT) that is delivered using video teleconferencing (VTC). I-PCIT was implemented with the family of a 5-year-old Australian boy presenting with clinically significant disruptive behavior and CU traits living in a rural community. Findings from this case report (a) document an improvement in disruptive behavior that was maintained to follow-up and (b) provide preliminary support for adapting PCIT to online delivery formats to enhance accessibility of services and improve child and parent outcomes.

Background: Elevated levels of callous‐unemotional (CU) traits have proven useful for identifying a distinct subgroup of children whose conduct problems (CP) are early emerging, severe, persistent, and underpinned by aberrant emotional processing. The early childhood emotional experiences and expressions of CP subtypes are poorly understood, despite their importance to understanding the problematic attachments and atypical social affiliation experienced by children with elevated CU traits. The current study aimed to test for differences in facial emotional reactions to mood‐inducing film clips in children with CP and varying levels of CU traits. Method: We compared facial emotional reactions during a developmentally appropriate mood induction task in a mixed‐sex sample of clinic‐referred preschool children ( M _age = 3.64 years, SD = 0.63, 66.9% male) classified as CP with elevated levels of CU traits (CP + CU; n = 25) versus low CU traits (CP‐only; n = 47), and typically developing children (TD; n = 28). Results: Relative to TD children, children with clinical CP showed less congruent and more incongruent facial emotional expressions to sad and happy film clips, controlling for child sex, age, and ethnicity. Conclusions: Consistent with older samples, young children with CP show atypical facial emotional expressions in response to positive and negative emotional stimuli. Findings have implications for developmental models of childhood antisocial behavior and can inform the development of targeted interventions.

Callous‐unemotional (CU) traits have increasingly received attention as a potential predictor and outcome of treatment for children with conduct problems. The results of Perlstein et al. (2023) offer the first meta‐analytic evidence against the long‐held belief that CU traits confer treatment resistance. The results also suggest that children with conduct problems and CU traits require something more or different to achieve treatment outcomes commensurate with their conduct problems‐only peers. In this commentary, I reflect on how treatment adaptations for children with conduct problems and CU traits have attempted to achieve this goal, emphasizing that more work is needed to maximize improvement in putative mechanisms and mediators of treatment‐related change. In this way, I argue that Perlstein et al. (2023) offer both optimism and guidance for improving treatment effects among children with conduct problems and CU traits.