Static-99© Assessment

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:

  • Prior sexual offenses
  • Prior sentencing dates
  • Any convictions for non-contact sex offenses
  • Current convictions for non-sexual violence
  • Prior convictions for non-sexual violence
  • Unrelated victims
  • Stranger victims
  • Male victims
  • Young
  • Single

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.

In SORAF, when you choose to create a new Static-99 assessment, you can specify several parameters in the General Info section, including the offense type and the assessment purpose (whether initial or reassessment).

The other fields are entered in the scoring form, as shown below:

General Info Section

Scoring Form Section

The Static-99 score report computes the total score and static risk category and presents them along with the original responses in a concise, easy-to-read format: