Insanity plea

Examining 484 consecutive criminal cases in which the NGRI plea was made, it was found: (1) a high degree of interexaminer agreement existed on the issue of the defendant's mental state in a nonadversary examination procedure; and, (2) court verdicts were highly congruent with the opinions expressed by examiners on the issue of insanity.     

Insanity plea: predicting not guilty by reason of insanity adjudications

Using 35 variables and discriminant analysis procedures, it was found that, of 133 male defendants entering the insanity plea in Colorado, 87 percent were classified correctly into the disposition groups "adjudicated insane" and "convicted." Most positively related to an insanity adjudication were a psychiatric evaluation of insanity and a diagnosis of schizophrenia. Negatively related to the insanity verdict were diagnoses of substance use and personality disorders.