The goals of the recidivism study were (1) to discover and disseminate descriptive and analytical information on recidivism rates of New Jersey probationers; (2) to identify, promote the deliberation of, and act on the policy implications of those findings for probation administration; and (3) to test, develop, and promulgate a standardized definition of recidivism for statistical reporting in New Jersey. The goals of the classification study were to evaluate the effectiveness of the probationer classification scheme proposed by the New Jersey Correctional Master Plan, to identify strengths and weaknesses of the model and develop a more reliable instrument, and to disseminate the findings with the aim of promoting the classification system's implementation in county probation departments. Following a description of the methodology, including discussion of the selection and size of the sample and observations about the data collection instrument, a profile of the study population is presented. In addition to the presentation of recidivism findings, a working definition of recidivism is developed, and the rates and patterns of recidivism in the five counties studied are presented. A critique of the working definition of recidivism is provided. Tables present data on sample profile, recidivism findings, analysis of proposed recidivism definition, classification findings, application of the Base Expectancy Score to varying size population groups, demographic variables, criminal history, probation performance variables, a profile of probationers at termination by county, and recidivism after beginning of term. The data gathering instrument and data tables are appended. Footnotes and additional tables are included.