Predicting institutional violence in offenders with intellectual disabilities: The predictive efficacy of the VRAG and the HCR-20

Fitzgerald, Suzanne, Gray, Nicola S., Alexander, Regi T., Bagshaw, Ruth, Chesterman, Paul, Huckle, Phillip, Jones, Susan K., Taylor, John, Williams, Tegwyn and Snowden, Robert J. (2013) Predicting institutional violence in offenders with intellectual disabilities: The predictive efficacy of the VRAG and the HCR-20. Journal of Applied Research in Intellectual Disabilities, 26 (5). pp. 384-393. ISSN 1360-2322

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Abstract

Background: There is a developing evidence base to support the use of risk assessment instruments in offenders with intellectual disability (ID). The aim of this study was to try to develop this literature with the inclusion of a control group of mentally disordered offenders without an ID, using the HCR-20 and VRAG. Materials and Methods: The VRAG and the HCR-20 were completed for a group of offenders with an ID (n = 25) and a control group (n = 45), in four medium-secure units across the UK. The outcome measure was physical aggression measured over 6 months. Results: Both instruments consistently produced large effect sizes predicting any physical aggression and severe physical aggression. The structured clinical judgement based on the HCR-20 was especially good. Conclusions: The HCR-20 and the VRAG have excellent predictive efficacy in offenders with an ID. A structured clinical judgement based on the HCR-20 was especially predictive.

Item Type: Article
Uncontrolled Keywords: actuarial measures,intellectual disabilities,risk assessment,structured clinical judgement,sdg 16 - peace, justice and strong institutions ,/dk/atira/pure/sustainabledevelopmentgoals/peace_justice_and_strong_institutions
Faculty \ School: Faculty of Medicine and Health Sciences > Norwich Medical School
Depositing User: Pure Connector
Date Deposited: 24 Sep 2015 08:50
Last Modified: 04 Mar 2024 17:26
URI: https://ueaeprints.uea.ac.uk/id/eprint/54505
DOI: 10.1111/jar.12032

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