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Competent and incompetent criminal defendants

A quantitative review of comparative research

Bibliographic Data

ID14447448
AuthorsRobert A Nicholson (0000-0002-2725-9739, University of Tulsa), Karen E Kugler
Year1991
Volume109
Issue3
Pages355-370
Publication date1991-05-01
Open AccessNo
TypeARTICLE
VenuePsychological Bulletin (JOURNAL)
Journal identifiersISSN: 0033-2909 • E-ISSN: 1939-1455
PublisherAmerican Psychological Association (APA) (PUBLISHER)
DOI10.1037/0033-2909.109.3.355
PMID2062978
OpenAlexW1973500046
LanguageEN
Citations received12
References cited6

Thirty studies comparing competent and incompetent criminal defendants (N = 8,170) were quantitatively reviewed to identify variables associated with judgments about defendants' competency to stand trial. Effect sizes reflecting the magnitude of the relationship between competency status and defendant characteristics were derived and averaged across studies. The characteristics most strongly related to incompetency were (a) poor performance on psychological tests or interviews specifically designed to assess defendants' legally relevant functional abilities, (b) a psychotic diagnosis, and (c) psychiatric symptoms reflective of severe psychopathology. To a lesser degree, traditional psychological tests, previous psychiatric hospitalization, previous legal involvement, marital resources, and demographic characteristics were also related to competency status. Although these results are generally consistent with the legal standard for competency to stand trial, some of the correlates of competency may reflect potential biases in the decision-making process. Limitations of existing research and directions for future inquiry are discussed

Marital status · Psychopathology · Clinical Psychology · Criminal Justice and Corrections Analysis · Medicine · Psychology · Psychopathy, Forensic Psychiatry, Sexual Offending · Schizophrenia research and treatment · Social Psychology

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    P Ann Dirks‐Linhorst, P Ann Dirks-Linhorst et al.•Women & Criminal Justice•2019

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    Ann Dirks-Linhorst, Donald M Linhorst et al.•Journal of Ethnicity in Criminal…•2018

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    Robert Hogan, Robert A Nicholson•American Psychologist•1988

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    Open Access•V SIOMOPOULOS•Psychological Reports•1978

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Citations per year0.43
Citation span1998 - 2026 (29)
Highly citedNo

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