Psychopathy is a clinical construct defined by a constellation of interpersonal, affective, lifestyle, and antisocial traits and behaviours. The most widely used instruments for its measurement are the Psychopathy Checklist—Revised and its derivatives.
Psychopathy is conceptually similar to ASPD; however, at the measurement level, the former places more emphasis on interpersonal and affective features and their links to broad antisocial tendencies, while the latter emphasizes overt antisocial behaviours.
The empirical association between psychopathy and ASPD is asymmetric; most people with psychopathy meet the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition, diagnostic criteria for ASPD, but the converse is not true.
Psychopathy is associated with an increased risk for antisocial behaviour, crime, and violence, and presents the mental health and criminal justice systems with a formidable therapeutic challenge.