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Abstract:
Studies on the effectiveness of correctional treatment in prison often strive for a high internal validity but neglect aspects of substantiation of content. This study tries to reach high internal validity and to treat the question of how much effectiveness can be expected in prison at all. Therefore, the way from treatment to recidivism is examined for important groups of variables with a longitudinal design. The results show that the success is rather low and prison is an extremely unfavorable place for a positive correction of people. The benefit of correctional treatment in prison for society is apparently overrated if studies only take into account the potentially positive—the effect sizes after correctional treatment—and exclude the negative aspects.
