“…Studies focusing on callous‐unemotional traits demonstrate that individuals high on these traits show lower HR at rest and reduced HR and SC responsiveness to emotionally evocative (i.e., fear and pain) stimuli and after provocation from peers (Anastassiou‐Hadjicharalambous & Warden, ; de Wied, van Boxtel, Matthys, & Meeus, ; Kimonis et al, ; Muñoz, Frick, Kiimonis, & Aucoin, ; Muñoz, Kerr, & Besic, ; Northover, Thapar, Langley, & van Goozen, ; see Fanti, , for a review). Similarly, limited evidence suggests that grandiose and narcissistic traits are associated with low SC and HR responses to aversive stimuli (Kelsey, Ornduff, McCann, & Reiff, ). However, one study that examined all dimensions of psychopathy together indicated that the interpersonal factor of psychopathy, which captures grandiose‐manipulative traits, explained much more of the variance of HR activity than the affective or impulsive dimensions (Hansen et al, ).…”