Evaluating the effects of the sex offender treatment program in Japanese prisons

2016 Fiscal Year Final Research Report

• Project/Area Number: 26380926
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Research Field: Clinical psychology
• Research Institution: Hyogo University of Teacher Education
• Principal Investigator: Yuma Yoshikazu 兵庫教育大学, 学校教育研究科, 教授 (70406536)
• Project Period (FY): 2014-04-01 – 2017-03-31
• Keywords: 性犯罪受刑者 / 処遇効果 / 生存分析 / 傾向スコア

Outline of Final Research Achievements

This study examined preventive effects of the sex offender treatment program in Japanese prisons (SOTPJ) with 3-5-year follow-up data of 598 male sex offence ex-prisoners. We used parametric survival models, controlling confounding factors with a propensity score method. We found that (1) there were different recidivism processes between molesters and non-molesters, (2) for molesters, SOTPJ did not have any significant effects on recidivism, (3) for non-molesters, SOTPJ had a significant and preventive effect on recidivism until 500 days after release from prisons, and (4) molesters had higher recidivism rates than non-molesters did during the follow-up period regardless of their participation in SOTPJ.

Free Research Field

犯罪心理学