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32 Crim. Just. & Behavior 3 (2005)

handle is hein.journals/crmjusbhv32 and id is 1 raw text is: TRANSFERRING THE PRINCIPLES OF EFFECTIVE TREATMENT INTO A REAL WORLD PRISON SETTING GUY BOURGON Corrections Research, Public Safety and Emergency Preparedness Canada BARBARA ARMSTRONG 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 3

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