What is the STABLE-2007?
STABLE-2007 is a measure of risk factors relevant for the treatment and supervision of adult males charged or convicted of a sexually motivated offence. It was first described in a government report (Hanson, Harris, Scott, & Helmus, 2007) and later as a journal article (Hanson, Harris, & Helmus, 2015). I am honoured to be a part of the STABLE-2007 development team and below share some of my contributions to the evidence base supporting its use.
Revising STABLE-2007 Combination Rules
Brankley, A. E., Helmus, L.-M., & Hanson, R. K. (2017). STABLE-2007 evaluator workbook: Updated recidivism rates (includes combinations with Static-99R, Static-2002R, and Risk Matrix 2000). Unpublished report. Ottawa, ON: Public Safety Canada. Want a copy?
In this document, readers will find updated psychometric information on STABLE-2007 (i.e., percentiles, distributions), updated rules for combining STABLE-2007 with Static-99R/2002R to produce standardized risk levels, and updated recidivism tables that can be used in applied reports. Also included in this document are new relative risk ratios for the standardized risk levels and reporting templates.
Predictive and Incremental Validity of STABLE-2007
Brankley, A. E., Babchishin, K. M., & Hanson, R. K. (Accepted). STABLE-2007 demonstrates predictive and incremental validity in assessing risk-relevant propensities for sexual offending: A meta-analysis. Sexual Abuse.
This meta-analysis evaluated the ability of STABLE-2007 and its items to discriminate between recidivists and non-recidivists, and the extent to which it improves prediction over and above Static-99R. Based on 20 studies (12 unique samples, N = 6,955), we found STABLE-2007 was significantly and incrementally related to sexual recidivism, violent (non-sexual), violent (including sexual) recidivism, and any crime. Scores on STABLE-2007 items and the three STABLE-2000 attitude items also discriminated between individuals who sexually reoffended and those who did not sexually reoffend. These findings support the use of STABLE-2007 in applied risk assessment practice and support the STABLE-2007 items as indicators of treatment targets.