Hare Psychopathy Checklist-Revised (PCL-R)

The Hare Psychopathy Checklist is an established instrument for measuring psychopathy. Hare’s used a sample of 4,981 prison inmates and 1,246 inmates to calculate an alpha coefficient of 0.87 for both. Inter-rater reliability was also very high according to Rogers (2001). For a 5-year time period, the test-retest coefficient was presented at 0.89 (Schroeder, Schroeder, and Hare, 1983). Validity has been supported factor analysis studies (Hare, Harpur, Hakistan, Forth, & Hart, 1990) using samples of prisoner and forensic inpatients.