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This article presents an evaluation of the Client Management Classification System (CMC), a method for assessment and differential supervision of offenders that embodies the principle of responsivity. As in prior evaluations of the CMC. probationers whose officers were trained in CMC techniques experienced lower rates of revocation compared with regularly supervised subjects. However, the experimental group incurred similar or higher rates of rules violations and arrests. Of particular interest, the study found that supervision of experimental subjects did not conform to recommended CMC strategies. In combination, these results suggest the possibility that training in CMC successfully heightened officers 'understanding of offender motivation's and needs, leading them to view probationer misconduct in a more lenient and flexible context--and thereby producing the appearance of favorable outcomes. The findings have implications for the design of evaluations of efforts to implement principles of effective offender treatment in community corrections agencies. Keywords: offender classification; responsivity principle; probation supervision

This article compares the predictive accuracy of a traditional, objective probation risk assessment instrument with the considerably more subjective, interview-based Client Management Classification (CMC) System, a tool with no previously noted applications to the prediction of risk. Subjects of the study were probationers under supervision in Austin, Texas. Results indicated that the CMC performed far more satisfactorily than did the traditional instrument. The CMC was found to be particularly successful in minimizing false positives (i.e., probationers incorrectly predicted to be high risks). The results suggest that offender risk assessment instruments of a national scope are possible. Implications for assessment and probation supervision practices are considered.