The Maladaptive Behavior Record (MBR) analyzes and Predicts criminal behavior. Its 16 items yield a score indicating the degree of maladaptive behavior in the areas of occupation, interpersonal relationships, addiction, psychological adjustment, and legal and other behavioral problems. The MBR was used in two longitudinal followup studies to analyze criminal behavior and assess the effects of institutional treatment on the postrelease adjustment of released offenders, particularly in terms of law encounters and recidivism. Data on 119 prison releasees were used to validate the MBR against the law Encounter Severity Scale (LESS), a criterion for criminal behavior that ranges from no law encounters to return to prison for a life sentence. The predictive accuracy of the total score is 70 percent for all cases and about 85 percent for outlying groups and scores. In addition to validity, the consistemcy and reliability of the MBR are high. The MBR yielded moderate to substantial correlation with two other instruments, the Environmental Deprivation Scale (EDS) and the Weekly Activity Report (WAR). (Author/SM)