Assessed curative factors among therapy groups of 123 offenders (aged 17-59 yrs) experiencing differentially restrictive incarceration from probation through minimum and maximum security to a segregation unit for behaviorally problematic prisoners. Catharsis was highly rated, as in earlier studies, while interpersonal learning input was rated at varying levels. Existential awareness was rated much higher than with typical outpatient populations, while cohesiveness, family reenactment, identification, and guidance were rated lower. (PsycINFO Database Record (c) 2019 APA, all rights reserved)