ASSESSING LENGTH OF INSTlTUTIONALIZATION IN RELATION TO PAROLE OUTCOME

This study assesses the relative impact of different lengths of imprisonment upon parole outcome, for narcotic law violotors, while holding other factors constant. Three alternative procedures for measuring association (r, ø and r t ) were each used in parallel base expectancy analyses on the same data base. The study group consists of 929 narcotic law violators who were paroled in 50 jurisdictions. Parole performance ws derived after a twe‐year follow‐up period The 1968 parolees were used to develop offender risk ratings. These ratings were applied to 1969 parolees to determine whether they would be associated with parole outcome in a new sample. The three methods worked about the same for developing offender risk ratings. Once personal characteristics of offenders were taken into considemtion, the number of months served had no consistent relationship to parole outcome. This remained true for all three parallel techniques used .