The Revised Psychopathy Checklist: Reliability and Factor Structure. Hare, Robert D., Harpur, Timothy, J., Hakstian, A.R., Forth, Adelle E., and Hart, Stephen D. Scale scores are calculated as the sum of respective items. It was derived from the Hare Psychopathy Checklist-Revised, or PCL-R. Description of the scales and item loadings are listed below. The Hare Psychopathy Checklist: Screening Version (PCL:SV) is a 12-item symptom-construct rating scale designed for use by expert observers to assess the lifetime presence and severity of symptoms of psychopathic personality disorder. The PCR yields 2 primary scales and one total score. The PCR consists of 20 items that are rated on a three-point scale (from 0 to 2) based on the degree to which the personality/behavior of the subject matches the description of the item. Factor 2 is a measure of Antisocial Behavior (deviance from an early age, aggression, impulsivity, irresponsibility, proneness to boredom).
Factor 1 is a measure of Emotional Detachment (e.g., superficial charm, manipulativeness, shallow affectivity, absence of guilt or empathy). The Psychopathy Checklist-Revised (PCR) is a 20-item scale scored from interview and file information.
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