3.2 Self-Report Psychopathy Scale-III
The Self-Report Psychopathy Scale-III (SRP-III; Paulhus et al., 2016) is
a self-report inventory designed to measure psychopathy in community
samples. The SRP-III captures indicators of psychopathy across four
factors (16-items each): Interpersonal Manipulation (IPM), Callous
Affect (CA), Erratic Lifestyle (ELS), and Antisocial Behavior (ASB).
Item responses were recorded on a 5-point Likert scale (1 = disagree
strongly to 5 = agree strongly). The factor structure and validity of
the SRP-III has been verified in community samples (Gordts et al., 2017;
Mahmut et al., 2011; Neal & Sellbom, 2012; Vitacco et al., 2014). The
SRP-III total score (Cronbach’s alpha = 0.88), IPM (Cronbach’s alpha =
0.79), CA (Cronbach’s alpha = 0.75), ELS (Cronbach’s alpha = 0.78) and
ASB (Cronbach’s alpha = 0.71) demonstrated adequate to good internal
consistency. Scale scores for all self-report trait measures were
estimated as the sum of item scores.