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| Level of Service Inventory-Revised× | Static-99 Assessment× | |
|---|---|---|
| Field | Criminology | Criminology |
| Family | Process / pipeline | Process / pipeline |
| Year of origin≠ | 1995 | 2000 |
| Originator≠ | Donald A. Andrews & James Bonta | R. Karl Hanson & David Thornton |
| Type≠ | Actuarial risk/needs assessment instrument | Actuarial sexual recidivism risk instrument |
| Seminal source≠ | Andrews, D. A., & Bonta, J. (2010). The Psychology of Criminal Conduct (5th ed.). Routledge/Anderson. ISBN: 9781422463291 | Hanson, R. K., & Thornton, D. (2000). Improving risk assessments for sex offenders: A comparison of three actuarial scales. Law and Human Behavior, 24(1), 119–136. DOI ↗ |
| Aliases | LSI-R, Level of Service Inventory, Level of Service Inventory Revised, LSI-R Assessment | Static-99, Static-99R, Static 99, Static-99 Sexual Recidivism Risk Tool |
| Related | 4 | 4 |
| Summary≠ | The Level of Service Inventory-Revised (LSI-R) is a 54-item actuarial assessment of offender risk and need that operationalizes the Risk-Need-Responsivity model. Items spanning ten criminogenic domains are scored and summed into a total that places an offender in a recidivism-risk band, making the LSI-R one of the most widely used and validated correctional case-management instruments in the world. | Static-99, and its age-revised form Static-99R, is the most widely used actuarial instrument for estimating sexual and violent recidivism risk among adult male sexual offenders. It scores ten unchanging, historical risk factors into a total that maps onto a risk category and, via published norm tables, an estimated probability of reoffending — providing a standardized, evidence-based anchor for forensic risk decisions. |
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