“…While callousness has been studied extensively within the youth psychopathy literature, with considerable evidence emerging for a critical distinction between conduct disorder with and without callous–unemotional traits (e.g., Frick et al, 2014; Viding & Kimonis, 2018), recent work has sought to index and validate this construct in adults (Brislin et al, 2017; Kimonis, Branch, Hagman, Graham, & Miller, 2013). Initial evidence from studies assessing callousness in adults provides evidence for emotional-reactivity deficits similar to those found in highly callous youth (Brislin et al, 2017; Fanti, Panayiotou, Kyranides, & Avraamides, 2016; Kyranides, Fanti, & Panayiotou, 2015; Mowle, Edens, Ruchensky, & Penson, 2018). However, research of this kind has yet to integrate data from the domains of physiology and behavior to better understand the time course of aberrant neural responding and its relationship to behavioral-recognition effects indicative of decreased emotional sensitivity.…”