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Relationship of Competency to Stand Trial and Criminal Responsibility

NCJ Number
123961
Journal
Criminal Justice and Behavior Volume: 17 Issue: 2 Dated: (June 1990) Pages: 169-185
Author(s)
W G Johnson; R A Nicholson; N M Service
Date Published
1990
Length
17 pages
Annotation
Mental health professionals have been accused of confusing the constructs of competency to stand trial and criminal responsibility with each or with a third construct such as psychosis. This investigation examined the relationship between decisions about competency to stand trial and criminal responsibility in a sample of 121 defendants admitted to a State hospital for pretrial evaluation.
Abstract
In addition, the investigation examined correlates of the two kinds of decisions using demographic data, measures of cognitive functioning and psychopathology, and a rating of crime severity. Conclusions about the empirical relationship between competency and responsibility judgments were precluded because examiners classified most incompetent defendants as "undetermined" on the issue of criminal responsibility. Nevertheless, interesting differences in the correlates of the two legal decisions were obtained. Competency decisions showed modest but significant correlations with performance on a test of competency abilities, a measure of intellectual functioning, and psychiatric diagnosis. Responsibility decisions were most strongly correlated with two indices of psychopathology -- psychiatric diagnosis and the presence of hallucinations and delusions. 2 tables, 2 notes, 32 references. (Publisher abstract)