32 Crim. Just. & Behavior 3 (2005)

handle is hein.journals/crmjusbhv32 and id is 1 raw text is: 




Corrections Research, Public Safety and Emergency Preparedness Canada
St. Lawrence Valley Correctional and Treatment Centre

The principles of risk, need, and responsivity have been empirically linked to the effectiveness of
treatment to reduce reoffending, but the transference of these principles to the inside of prison
walls is difficult. Results from a sample of 620 incarcerated male offenders-482 who received
either a 5-week, 10-week, or 15-week prison-based treatment program and 138 untreated com-
parison offenders-found that treatment significantly reduced recidivism (odds ratio of .56;
effect size r of .10) and that the amount of treatment (e.g., dosage) played a significant role
(odds ratios between .92 and .95 per week of treatment; adjusted effect size r of .01 and .02).
These results indicate that prison-based treatment can be effective in reducing recidivism, that
dosage plays a mediating role, and that there may be minimum levels of treatment required to
reduce recidivism that is dependent on the level of an offender's risk and need.

Keywords: recidivism; treatment; dosage; cognitive-behavioral; prison

A considerable body of evidence has accumulated regarding the
     effectiveness of correctional treatment  to reduce recidivism. Evi-
dence  suggests that effective correctional treatment programs  follow a
number   of general  principles. Among the most important are risk,
need, and  responsivity (Andrews   &  Bonta,  1998; Andrews,   Bonta,  &

AUTHOR NOTE: The authors wish   to acknowledge Michael Cote, Superintendent;
Gerald Stump, Deputy Superintendent; and all the staff at Rideau Correctional &
Treatment Centrefor their support, hard work, and dedication to deliver and evaluate
quality treatment programs. A special thanks to Paul Gendreau, Jim Bonta, and Karl
Hanson for theirfeedback on earlier versions of the manuscript. Lastly, the authors
CRIMINAL JUSTICE AND BEHAVIOR, Vol. 32 No. 1, February 2005 3-25
DOI: 10.1177/0093854804270618
0 2005 American Association for Correctional and Forensic Psychology


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