Evaluating insanity: A study of construct validity.

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Abstract
In place of the individualistic-subjective approaches to insanity evaluations, a specific criterion-based construct of insanity is proposed and examined. This construct entails the presence of a severe mental disorder which has substantially impaired the individual's cognitive and/or behavioral control. The construct was tested through the utilization of a specifically designed protocol (RCRAS) on 73 insanity evaluations from three forensic settings. Estimates of inter-rater reliability were obtained by indepedent rating of 25 cases, and yielded satisfactory to exceptionally high reliability coefficients (mean kappar=0.77). Results of a discriminant analysis and MANOVA generally confirmed the validity of the construct, demonstrating that insane patients were evaluated as having more severe psycho-pathology and a greater loss of cognitive and behavioral control.

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