The Efficacy of the Growing Pro-social Program in Reducing Anger, Shame, and Paranoia over Time in Male Prison Inmates: A Randomized Controlled Trial
2018
Objectives:This randomized controlled trial aimed to assess the efficacy of a cognitive-behavioral group program, Growing Pro-Social (GPS), in reducing anger, shame, and paranoia over time in Portuguese male prison inmates.Methods:Participants were randomized to the GPS treatment (n = 121) or control group (n = 133). The State-Trait Anger Expression Inventory, the Other as Shamer Scale, and the Paranoia Scale were completed at baseline, at the middle of treatment, at posttreatment, and at 12 months’ follow-up. Intervention effects were tested with latent growth curve models (LGCM).Results:At baseline, no significant differences between groups were found. Results from LGCM showed that condition was a significant predictor of change observed in all outcome measures over time. While treatment participants showed a significant increase in anger-control over time, controls presented a significant decrease over time in this same variable. For the remaining dimensions of anger, as well as for external shame and ...
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