Edith Cowan University and Western Australian Department of Justice
Place of Publication
Perth, Western Australia
School of Psychology
As the prediction of the risk of sexual reoffending behaviour has become more important in the corrections setting, so has the development of instruments to assist practitioners in doing risk evaluations. International research underpins most of the instruments used in Western Australia (WA), and in Australia for that matter. The present study explored the predictive accuracy of instruments developed internationally and locally as a function of ethnicity (Indigenous and non Indigenous) and nature of offending (non violent sexual and violent sexual). The Rapid Risk Assessment for Sexual Recidivism (RRASOR) and the Static 99 were the international instruments, for the prediction of sexual reoffending, that were evaluated. Two WA instruments were investigated. Firstly, the Violent Offender Treatment Program Risk Assessment Scale (VOTP RAS), also called the Level of Service Need Inventory (LOSNI), an instrument that was developed to predict violent reoffending. Secondly, the 3-Predictor model that was previously developed by Allan and Dawson (2002) to predict sexual reoffending of Indigenous sexual offenders. Available data suggested that the locally developed 3-Predictor model was the most accurate of all these instruments.