National Archive of Criminal Justice Data

This dataset is maintained and distributed by the National Archive of Criminal Justice Data (NACJD), the criminal justice archive within ICPSR. NACJD is primarily sponsored by three agencies within the U.S. Department of Justice: the Bureau of Justice Statistics, the National Institute of Justice, and the Office of Juvenile Justice and Delinquency Prevention.

Validation of the RAND Selective Incapacitation Survey and the Iowa Risk Assessment Scale in Colorado, 1982 and 1986 (ICPSR 9292)

Principal Investigator(s): Mande, Mary


This data collection was designed to replicate the Rand Selective Incapacitation Survey and the Iowa Risk Assessment Scale using a group of Colorado offenders. The Iowa model provides two assessments of offender risk: (1) a measure of general risk to society and (2) a measure of the risk of new violence. The Iowa dataset includes crime information from defendants' self-reports and from official crime records. Both files contain important self-report items such as perceived probability of being caught, weapon used in the offense committed, months free on the street during the reference period, and detailed activity description during the free period. Other items covered include employment history, plans, reasons for committing the crime, and attitudes toward life, law, prisons, and police.

Access Notes

  • The public-use data files in this collection are available for access by the general public. Access does not require affiliation with an ICPSR member institution.


DS0:  Study-Level Files
DS1:  Rand Data - Download All Files (7.253 MB)
DS2:  Iowa Data - Download All Files (7.511 MB)

Study Description


Mande, Mary. VALIDATION OF THE RAND SELECTIVE INCAPACITATION SURVEY AND THE IOWA RISK ASSESSMENT SCALE IN COLORADO, 1982 AND 1986. Denver, CO: Colorado Dept. of Pubic Safety, Division of Criminal Justice [producer], 1987. Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 1990.

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This study was funded by:

  • United States Department of Justice. Office of Justice Programs. National Institute of Justice (84-IJ-CX-0034)

Scope of Study

Subject Terms:    criminal histories, criminality prediction, offenders, recidivism prediction, risk assessment, selective incapacitation

Geographic Coverage:    Colorado, United States

Date of Collection:   

  • 1984--1985

Universe:    Incoming male inmates and released inmates in Colorado.

Data Type(s):    survey data, and event/transaction data


Sample:    The sample for replicating the Rand study was an incoming cohort of 313 males sentenced to the Colorado Department of Corrections in 1986. Inmates housed at the Reception and Diagnostic Unit were selected first from an alphabetical list and later by location of cell block. Inmates backlogged at county jails were systematically selected from a list. The sample for validation of the Iowa model was selected from all inmates released from prison in 1982 who had been sentenced in the districts of Denver, Jefferson, El Paso, or Mesa. These districts were selected because of their well-maintained criminal records.

Data Source:

self-enumerated forms, parole and probation records from the Colorado Department of Corrections, and automated criminal history files of the Colorado Bureau of Investigation


Original ICPSR Release:   1990-03-02

Version History:

  • 2006-01-18 File CB9292.PDF was removed from any previous datasets and flagged as a study-level file, so that it will accompany all downloads.

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