“…Although research assessing within-person change in psychopathy remains sparse, studies utilizing more person-oriented methodologies (e.g., growth curve and trajectory-based approaches) have provided evidence suggesting there is considerable malleability in this construct. Findings from these studies have demonstrated significant within-person heterogenity across childhood and adolescence (Byrd, Hawes, Loeber, & Pardini, 2016; Pardini & Loeber, 2008), as well as important differences in group-based developmental trajectories (Fontaine, McCrory, Boivin, Moffitt, & Viding, 2011; Baskin-Sommers, Waller, Fish, & Hyde, 2015; Salihovic, Özedemir, & Kerr, 2013). These more recent studies highlight the importance of differentiating between individuals who exhibit psychopathic features that remain persistent and chronic in course, compared to those who display substantive change in such features across development.…”