2000/02/01 by R. Karl Hanson, David Thornton, David J. Thornton · 4 citations
Psychology · Social Sciences · #Crime Patterns and Interventions #Criminal Justice and Corrections Analysis #Psychopathy, Forensic Psychiatry, Sexual Offending
paper · doi:10.1023/a:1005482921333
openalex publication_date 2000/02/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/25
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.