WHAT ARE THE CORE FEATURES OF PSYCHOPATHY? A PROTOTYPICALITY ANALYSIS USING THE PSYCHOPATHY CHECKLIST-REVISED (PCL-R)

What are the core features of psychopathy? Previous prototypicality analyses showed that many features were considered as highly proto-typical. The authors extend this work by using forced ranking to grasp which features are most important. Forensic mental health professionals ranked the 20 Psychopathy Checklist-Revised (PCL-R) items on their importance to psychopathy. Affective-interpersonal features were judged to be of greater importance than behavioral-lifestyle features. The most important items were callous/lack of empathy, conning/manipulative, and lack of remorse or guilt, which were deemed more important than nearly all other PCL-R features. The prototypicality ranking of the 20 PCL-R items by the forensic mental health professionals showed strong overlap (r =.64 to .86) with psychometric indices of item importance (network centrality, item-total correlation, and item response theory discrimination parameter). Taken together, these findings clarify the relative importance of PCL-R features to psychopathy.