Improving Prison Classification Procedures in Vermont: Applying an Interaction Model, 1983-1985 (ICPSR 8933)

Published: Mar 21, 2000

Principal Investigator(s):
William K. Apao

Version V1

The purpose of this data collection was to develop and test an interactive model for classifying prisoners. The model includes person variables, environmental or situation variables, and prison-environmental interaction variables in order to study the interactions between individuals and their environments and to predict offender behaviors such as escape, misconduct, and violence. The model was designed to enhance the predictive validity of the National Institute of Corrections' classification system that was being used in Vermont prisons. Included are scores from the National Institute of Corrections' custody classification and reclassification instruments, scores from a needs assessment, sentencing information, and characteristics of the prison in which the inmate was housed.

Apao, William K. Improving Prison Classification Procedures in Vermont:  Applying an Interaction Model, 1983-1985  . Ann Arbor, MI: Inter-university Consortium for Political and Social Research [distributor], 2000-03-21.

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United States Department of Justice. Office of Justice Programs. National Institute of Justice (84-IJ-CX-0027)

1983-03 -- 1985-06

1985-01 -- 1985-08

The codebook for this collection is provided as a Portable Document Format (PDF) file. The PDF file format was developed by Adobe Systems Incorporated and can be accessed using PDF reader software, such as the Adobe Acrobat Reader. Information on how to obtain a copy of the Acrobat Reader is provided through the ICPSR Website on the Internet.

The sample consists of 982 inmates incarcerated in Vermont state correctional facilities who had at least 30 days to serve in their sentences. Median age of the sample was 25 years with a range of 15 to 69 years. Males constituted 97.5 percent of the sample and had a median minimum sentence of one year and a median maximum of three years.

Inmates of state correctional facilities in Vermont.

records of the Vermont State Department of Corrections

event/transaction data



2000-03-21 SAS and SPSS data definition statements and a PDF codebook have been added to this collection.


  • 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.

  • The citation of this study may have changed due to the new version control system that has been implemented.
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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.