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Do psychological interventions impact on actuarial measures: an analysis of the predictive validity of the static-99 and static-2002 on a re-conviction measure of sexual recidivism

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This study examined the differential predictive validity of the Static-99 and Static-2002 among treatment completers, dropouts, and non-starters. The researcher acquired archival data on a cohort of adult male sexual offenders who received a Federal sentence in Canada. In particular, this study examined all sexual offenders in Canada that met the Static-99 definition of a sexual offence that reached warrant expiry in 1995 (n = 674). The dependent variable in this study was reconviction for a sexual offence within seven years of an offender's warrant expiry date. Results revealed that the Static-99 was able to significantly predict the sexual recidivism of treatment completers and treatment dropouts; however, its predictive ability was not significant with treatment non-starters. The Static-2002 was found to have significant predictive validity with treatment completers and nonstarters. Post-hoe analyses on the differences between treatment non-starters, completers, and dropouts were performed.

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Haag, A. M. (2005). Do psychological interventions impact on actuarial measures: an analysis of the predictive validity of the static-99 and static-2002 on a re-conviction measure of sexual recidivism (Doctoral thesis, University of Calgary, Calgary, Canada). Retrieved from https://prism.ucalgary.ca. doi:10.11575/PRISM/19654

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