In 2011, he released the book The Psychopath Test: A Journey Through the Madness Industry, which delved into the topic of psychopathic behaviour via the Hare Psychopathy Checklist
and examined its reliability.
While Cleckley's 1941 publication made a notable impact on the field, empirical research on the syndrome did not gain a solid foothold until the development of the Hare Psychopathy Checklist
(PCL) in the 1990s (Edens, Skeem, & Kennealy, 2009).
The research involved 30 inmates who were psychologically assessed using the Hare Psychopathy Checklist
(PCL-R) which measures psychotic characteristics.
Currently, one disagnostic tool exists that, after repeated testing, has been found to accurately and consistently diagnose individuals as psychopaths--the Hare Psychopathy Checklist
2007) (offering an in-depth narrative of "psychiatric literature in the late 18th century to the development of the Hare Psychopathy Checklist
in the late 20th century.
Identifying persistently antisocial offenders using the Hare Psychopathy Checklist
and DSM Antisocial Personality Disorder Criteria.
Construct validity of the Hare Psychopathy Checklist
, Revised, on a UK prison population.
Hare Psychopathy Checklist
Youth Version (PCL:YV): A Preliminary Study in a Brazilian Adolescents Sample
Psychopathic disturbances in the Scottish prison population: The cross-cultural generalisability of the Hare psychopathy checklist
A good reference for clinicians who may have concerns that a patient might be violent is the Hare Psychopathy Checklist
The Hare Psychopathy Checklist
Revised (PCL-R) is becoming increasingly recognized as a valid and reliable method for assessing psychopathy in male forensic populations.
48) Namely, the Hare Psychopathy Checklist
released a youth version (PCL: YV), which modified the twenty-two items and scoring criteria of the PCL-R used to detect psychopathy in adults.