The Static-99 is a brief actuarial instrument designed to estimate the probability of sexual and violent recidivism among adult males who have already been convicted of at least one sexual offense against a child or non-consenting adult.
The scale contains 10 items:
The Static-99 is intended to be a measure of long-term risk potential. Given its lack of dynamic factors, it cannot be used to select treatment targets, measure change, evaluate whether offenders have benefited from treatment, or predict when (or under what circumstances) sex offenders are likely to recidivate. It is not recommended for adolescents (less than 18 years at time of release), female offenders or offenders who have only been convicted of prostitution, pimping, public toileting (sex in public locations with consenting adults), or possession of indecent materials.
The Static-99 is administered in an interview setting by probation/parole officers, correctional case managers, as well as mental health professionals.
Notes: by R. Karl Hanson, Ph.D., Dept. of the Solicitor General of Canada