This article presents the results of experimental research on the influence of psychosocial reintegration activities on behavioral changes in prisoners. The study tracked the existence of differences regarding the personality traits that generate openness, agreeableness, assertiveness, neuroticism and aggressiveness through the impact of psychosocial activities on the behavior of prisoners in the penitentiary environment. Thus, the prisoners participating in social reintegration programs had a

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... igher level of agreeableness and a lower level of neuroticism and aggression, which correlates with the effectiveness of the programs, but also with the need for their implementation in the longer term.