ABSTRACT
In 1941, Hervey Cleckley described a subgroup of patients who appeared to be normal (i.e., not insane) and yet lacked remorse and empathy and were very impulsive, deceptive, and manipulative. He suggested that these individuals suffered from '"emotional poverty," and he described in detail a number of symptoms, subsequently operationalized for research purposes by Hare (1980) in the Hare Psychopathy Checklist (PCl). A large number of studies using the PCl and its successor (the Hare Psychopathy Checklist-Revised lPCLR]; Hare, 1991,2(03) have established the importance of these instruments in research and in clinical and forensic practice (Cooke, Forth, & Hare, 1998; Fulero, 1995; Gacono, 2000; Patrick, 20(5).
