Investigating the construct of trauma-related acquired callousness among delinquent youth: differences in emotion processing.

This study tested theories regarding differences in emotion processing among youth characterized by primary versus acquired callous-unemotional (CU) traits in a sample of 417 detained adolescents (306 boys, 111 girls). Mixture modeling identified 2 groups of youth high in CU, but with different levels of posttraumatic stress symptoms consistent with theoretical conceptualizations of acquired CU as being linked to trauma. Differences between the 2 groups of youth were investigated regarding 3 dimensions of emotion processing: emotion regulation, numbing, and recognition. Compared to youth classified in the primary group, youth classified as acquired CU demonstrated greater difficulty with lack of clarity (OR = 0.53), and nonacceptance of emotions, (OR = 0.57), general numbing of emotions (OR = 0.87), and recognition of disgust (OR = 0.18). Differences in emotion processing reported by youth in the 2 groups are consistent with theories regarding acquired callousness as related to emotional detachment in the aftermath of posttraumatic distress. The results of the current study have implications for the classification of primary and acquired CU, as well as the clinical treatment of youth with these characteristics.