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Updated: Jul 4, 2026

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An R-Based Landscape Validation of a Competing Risk Model
Published on: September 16, 2022
Risk, Need, And Responsivity (RNR): It All Depends.
Faye S Taxman1, Meridith Thanner, David Weisburd
1Virginia Commonwealth University.
Crime and Delinquency
|June 11, 2008
Summary
A seamless treatment model for probationers improved participation, especially for high-risk offenders. However, no significant main effects were found on drug use or rearrest rates in this correctional program experiment.
Area of Science:
- Criminology
- Addiction Science
- Public Health
Background:
- Identifying effective correctional programs for specific offender populations remains a challenge.
- The
- what works for whom?
- question is central to optimizing interventions.
- Previous research highlights the need for targeted approaches in offender rehabilitation.
Purpose of the Study:
- To evaluate the effectiveness of a seamless treatment model compared to traditional referral for probationers.
- To determine differential effects on rearrest and substance abuse based on offender risk levels.
- To assess the impact of integrated drug treatment within probation supervision.
Main Methods:
- Random assignment of probationers to either a seamless treatment model or a traditional referral model across two sites.
- Utilizing the Wisconsin Risk Tool to stratify offenders by risk level and analyze differential effects.
- Measuring outcomes related to rearrest, substance abuse, and treatment participation.
Main Results:
- The seamless model significantly increased treatment participation, with greater gains observed for high-risk offenders.
- No significant main effects were found on overall drug use or rearrest rates.
- Effect sizes indicated potential small positive effects for high-risk offenders and negative effects for moderate-risk offenders in one site.
Conclusions:
- While the seamless model enhanced treatment engagement, particularly for high-risk individuals, it did not yield significant reductions in rearrest or drug use.
- Measurement issues, including low severity of substance abuse and prevalence of marijuana use, may have obscured main effects.
- The study underscores the importance of theoretically driven, dynamic risk and need assessments for identifying appropriate target populations in correctional interventions.
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