Static-99/Static-99R
Overview
The Static-99 is a ten item actuarial assessment instrument created by R. Karl Hanson, Ph.D. and David Thornton, Ph.D. for use with adult male sexual offenders who are at least 18 year of age at time of release to the community. It is the most widely used sex offender risk assessment instrument in the world, and is extensively used in the United States, Canada, the United Kingdom, Australia, and many European nations.
This site is dedicated to the community of Static-99 users, and governed by an Advisory Board whose members approve and submit content, and rotate responsibility for answering Static-99 coding questions. Our intent is to provide useful information in a timely manner, and to promote best practices in sexual offender assessment among professionals who routinely use the instrument.
Coding questions may be submitted to Dr. Karl Williams; please consult the coding manual and FAQs prior to submission. Routine questions will be answered by the Site Manager, who has the full confidence of the Static-99 developers. Complex questions will be referred by the Site Manager to the Advisory Board for discussion and a response will be forwarded to the requestor as quickly as possible (in most cases within 5 business days).
Veuillez envoyer les questions en français à Dr. Claire Ducro.
Documents
Static-2002
Static-2002
Static-2002R
Static-99 & Related Risk Assessment Research
- Helmus, Leslie (2009). Re-norming Static-99 recidivism estimates: Exploring base rate variability across sex offender samples
- Hanson, R.K. & Thornton, D. (2000). Improving risk assessments for sex offenders: A comparison of three actuarial scales. Law and Human Behavior, 24, 119-136.
- Annotated Bibliography of Static-99 Replications, with tables:
- Hanson, R. K. (2005). The Validity of Static-99 with Older Sexual Offenders. Ottawa, Ontario: Solicitor General of Canada.
- Hanson, R. K. & Harris, A. J. R. (1998). Dynamic Predictors of Sexual Recidivism. Ottawa, Ontario: Solicitor General of Canada.
- Hanson, R. K., Harris, A. J. R., Scott, T. L. & Helmus, L. (2007). Assessing the Risk of Sexual Offenders on Community Supervision: The Dynamic Supervision Project. Ottawa, Ontario: Solicitor General of Canada.
- Hanson, R. K. & Morton-Bourgon, K. E. (2009). The accuracy of recidivism risk assessments for sexual offenders: A meta-analysis of 118 prediction studies. Psychological Assessment, 21, 1-21.
- Hanson, R. K. & Morton-Bourgon, K. E. (2004). Predictors of Sexual Recidivism: An Updated Meta-Analysis. Ottawa, Ontario: Solicitor General of Canada.
- Harris, A. J. R. & Hanson, R. K. (2004). Sex Offender Recidivism: A Simple Question. Ottawa, Ontario: Solicitor General of Canada.
- Helmus, L. (2007). A Multi-Site Comparison of the Validity and Utility of the Static-99 and Static-2002 for Risk Assessment With Sexual Offenders. Honours Thesis, Carleton University.
- Thornton, D., Hanson, R.K., & Helmus, L. (2009). Moving beyond the Standard Model for Actuarial Assessment for Sexual Offenders.
Ongoing Research
- Info on research studies underway - coming soon
- Data Collection/Coding Standards - coming soon
Norms
- Static-99R Coding Form
- Static-99R: Revised Age Weights
- Reporting Static-99 in Light of New Research on Recidivism Norms - This article appeared in the newsletter for the Association for the Treatment of Sexual Abusers, The Forum, 21 (1), Winter 2009, p. 38-45.
- Reporting Static-99 Scores
- Resources – The following includes a template and an example of how evaluators can report Static-99 scores using the 2008 norms. This is only an example, and evaluators should use their professional judgment concerning the preferred wording, taking into consideration the purpose of the assessment and the expected readers of the report. Evaluators should feel free to download and edit the WORD document as they see fit
- Tables
- Research (e.g., presentations, articles)
- More detailed resources