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The psychological construct that describes immoral and antisocial behavior. The modern conception of psychopathy was put forth by Hervey Cleckley in his work The Mask of Sanity (1941). According to his criteria, a psychopath is an intelligent person who is devoid of emotions, has no sense of shame, is charming and manipulative, and displays irresponsible behavior. Psychopathic personality disorders have been the most studied of any personality disorder. Psychopathy has been operationalized by Robert Hare in his Psychopathy Checklist-Revised (PCL-R). This assesses both the affective and the interpersonal components as well as antisocial deficits in the patient. At the same time, findings from psychopathy research have not been shown to aid in diagnosis or treatment of this disorder. Two types of psychopathy have been defined ...

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