genetic effects across interpersonal (e.g., fearless dominance), affective (e.g., callous unemotionality), and antisocial features of psychopathy (Blonigen et al., 2005; Larsson, Andershed, & Lichtenstein, 2006). While such findings suggest that the expression of psychopathy is multifaceted, they are not necessarily incompatible with a view that different components of psychopathy can perhaps be understood in terms of a global factor of dis-sociality (Neumann, Hare, & Newman, 2007). Importantly, such a view is consistent with recent hierarchical models of both Externalizing (Krueger et al., 2007) and PCL-R defined psychopathy (Patrick et al., 2006) through the estimation of global (higher-order) factors as well as independent dimensions of psychopathy.
