The social construction of criminal responsibility and insanity

This study examines the effects of judicial instructions (traditional American Law Institute ALI] not guilty by reason of insanity NGRI] instructions contrasted with ALI instructions supplemented with the guilty but mentally ill GBMI] alternative) and case information cues (delusional content and planfulness) on student and community subjects' attributions of responsibility. GBMI instructions substantially reduced the probability of NGRI and guilty verdicts in response to vignettes portraying highly psychotic defendants and altered the pattern of variability in responsibility construal ratings. Variation in delusional content cues (self-defense versus non-self-defense) influenced ratings of criminal appreciation but did not affect the verdict distributions. Less planfully commited crimes resulted in higher proportions of insanity verdicts. However, individual differences in responsibility construals of the defendant and in attitudes toward the insanity defense were stronger predictors of verdicts than the design variables, suggesting that individual differences in social-moral cognition are at least as relevant to the attribution of responsibility as are case cues or legal frames of reference. Contrary to previous studies,Witherspoon death penalty attitudes were not related to verdicts, but people without conscientious scruples toward the death penalty were more likely to render guilty verdicts.