What is psychopathy and how is it measured?
Psychopathy is a research construct, not a formal DSM diagnosis, typically assessed using the Psychopathy Checklist-Revised (PCL-R) developed by Hare. It identifies a syndrome characterized by traits such as superficial charm, grandiosity, manipulative behavior, and a profound lack of empathy.
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This is one answer. The complete system — the psychology, the biology, and the method — is in the book.
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