For anyone seeking to question the validity and integrity of a psychology-based diagnosis of offending behaviour it helps to have grounding in a discipline disputed as being either an art or science.

The PCL-R (Psychopathy Checklist-Revised) is a 20-item rating scale for psychopathy. The PCL-R is considered a reliable and valid tool for measuring psychopathy, but its use is limited to forensic ...

After its publication in 1991, the Psychopathy Checklist-Revised (PCL-R) became established as the “gold standard” for determining the extent to which an individual possesses psychopathic ...