Field validity of Static-99R and STABLE-2007 with 4,433 men serving sentences for sexual offences in British Columbia: New findings and meta-analysis.

Many forensic assessment measures are developed and validated under research conditions but applied in the field, where professionals or paraprofessionals have varied training, unknown fidelity to administration procedures, and contextual pressures related to their institutions or legal system. Yet few studies examine the generalizability of psychometric properties of these scales as actually applied in field settings. This study examined 4,433 individuals assessed by probation officers on the Static-99R or STABLE-2007 sexual recidivism risk scales in British Columbia, Canada. Sexual, violent, and any recidivism were examined. Static-99R and STABLE-2007 had moderate accuracy in discriminating recidivists from non-recidivists, and both scales added incrementally in predicting all three outcomes (with Static-99R demonstrating higher accuracy). Organizing the items into constructs, sexual criminality, general criminality, and youthful stranger aggression incrementally predicted all three outcomes. For violent and any recidivism, the incremental effect of sexual criminality was in the negative direction (i.e., high sexual criminality was associated with relatively lower rates of violent and any recidivism). Calibration analyses indicated that recidivism rates were lower than what would be predicted by the norms for the scales. The current study also presented a meta-analysis of 15 field validity studies of Static-99R and 4 field validity studies of STABLE-2007. Results of the current study and meta-analysis support the field application of Static-99R and STABLE-2007, while emphasizing the importance of training and proper implementation. (PsycInfo Database Record (c) 2021 APA, all rights reserved).