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Improving Risk Assessments for Sex Offenders: A Comparison of Three Actuarial Scales

Improving Risk Assessments for Sex Offenders: A Comparison of Three Actuarial Scales The study compared the predictive accuracy of three sex offender risk-assessment measures: the RRASOR (Hanson, 1997), Thornton's SACJ-Min (Grubin, 1998), and a new scale, Static-99, created by combining the items from the RRASOR and SACJ-Min. Predictive accuracy was tested using four diverse datasets drawn from Canada and the United Kingdom (total n = 1301). The RRASOR and the SACJ-Min showed roughly equivalent predictive accuracy, and the combination of the two scales was more accurate than either original scale. Static-99 showed moderate predictive accuracy for both sexual recidivism (r = 0.33, ROC area = 0.71) and violent (including sexual) recidivism (r = 0.32, ROC area = 0.69). The variation in the predictive accuracy of Static-99 across the four samples was no more than would be expected by chance. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Law and Human Behavior Springer Journals

Improving Risk Assessments for Sex Offenders: A Comparison of Three Actuarial Scales

Law and Human Behavior , Volume 24 (1) – Oct 19, 2004

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References (44)

Publisher
Springer Journals
Copyright
Copyright © 2000 by Plenum Publishing Corporation
Subject
Psychology; Law and Psychology; Criminology and Criminal Justice, general; Personality and Social Psychology; Community and Environmental Psychology
ISSN
0147-7307
eISSN
1573-661X
DOI
10.1023/A:1005482921333
Publisher site
See Article on Publisher Site

Abstract

The study compared the predictive accuracy of three sex offender risk-assessment measures: the RRASOR (Hanson, 1997), Thornton's SACJ-Min (Grubin, 1998), and a new scale, Static-99, created by combining the items from the RRASOR and SACJ-Min. Predictive accuracy was tested using four diverse datasets drawn from Canada and the United Kingdom (total n = 1301). The RRASOR and the SACJ-Min showed roughly equivalent predictive accuracy, and the combination of the two scales was more accurate than either original scale. Static-99 showed moderate predictive accuracy for both sexual recidivism (r = 0.33, ROC area = 0.71) and violent (including sexual) recidivism (r = 0.32, ROC area = 0.69). The variation in the predictive accuracy of Static-99 across the four samples was no more than would be expected by chance.

Journal

Law and Human BehaviorSpringer Journals

Published: Oct 19, 2004

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