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- Grann, M, et al.
(författare)
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Actuarial assessment of risk for violence -: Predictive validity of the VRAG and the historical part of the HCR-20
- 2000
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Ingår i: CRIMINAL JUSTICE AND BEHAVIOR. - : SAGE Publications. - 0093-8548 .- 1552-3594. ; 27:1, s. 97-114
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Tidskriftsartikel (övrigt vetenskapligt/konstnärligt)abstract
- This article explores the predictive validity of two actuarial risk assessment instruments among mentally disordered offenders in Sweden: the historical part (H-10) of a historical, clinical, and risk management factors instrument (HCR-20) and the Violence Risk Appraisal Guide (VRAG). Actuarial scores were obtained retrospectively in two populations: one group of violent offenders with personality disorders and one with violent offenders diagnosed with schizophrenia. The predictive accuracy was evaluated with receiver operating characteristic analysis using a violent reconviction within 2 years from release or discharge as the criterion variable. Both scales fared better in the group of personality-disordered offenders than in the group of offenders with schizophrenia, and the H-10 fared better than the VRAG in both offender groups. The study found that historical data maintain a robust predictive validity in a population of personality-disordered offenders, whereas clinical and risk management factors may be of greater importance in offender populations in which major mental disorders are prevalent.
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