Congratulations to Stephanie G. Craig and Rayan Hayre who are graduating from Simon Fraser University on October 5th, 2017, earning a Ph.D. and B.A. (hons), respectively. Please see below for Dr. Craig’s dissertation abstract!
Background: Research on youth with callous-unemotional features (CU features; e.g., lack of empathy) has historically categorized these behaviors as biologically-driven and homogeneous across development. However, an early model proposed that two subtypes of CU features exist with different etiological factors. The first, or ‘primary’ group, has a genetically based deficit in emotion processing, resulting in a diminished sensitivity to others’ emotional cues. The ‘secondary’ CU group is conceptualized as an adaptation to environmental factors such as maltreatment and are characterized by an affective deficit produced by these powerful environmental factors. Secondary youth are typically classified or grouped based on the presence of co-occurring anxiety symptoms. Understanding the presentation of regulation strategies among CU variants may give us further insight into the different pathways to their development. In addition, due to the high number of samples that have relied on justice-involved males, there is a paucity of research on gender differences across the variants. Purpose: The aim of the current study was to evaluate whether distinct groups of youth may be identified in a clinical sample by using measures of affect dysregulation and suppression, anxiety symptoms and experience of maltreatment. It was also to examine whether these distinct groups were consistent across males and females. Method: Participants (N = 418; 56.7% female) ranged in age from 12 to 19 (M = 15.04, SD = 1.85) and were drawn from the baseline of a large clinical sample. Results: A Latent Profile Analysis (LPA) was conducted using five indicators including affect regulation, suppression, anxiety, CU features, and maltreatment. The best fitting model, a 4-class solution, had a significant Lo-Mendell-Rubin (p= .003), an acceptable entropy score (.78), and classification probabilities that suggested accuracy and good separation. The four groups to emerge included a low, anxious, primary CU, and secondary CU group. Gendered LPAs found a 4-class model fit for both males and females (entropy= .866). Gender did not moderate other outcomes of interest. Discussion: This study extends previous literature by including the underlying process of dysregulated affect to the model in identifying primary and secondary subgroups and examining gender. Clinical implications are discussed.