KANAZAWA, Yuichiro    Tokunin Kyoju (Professor by Special Appointment)    Division of Arts and Sciences, College of Liberal Arts, International Christian University
Research Period	2014/04～2017/03
Research Topic	Evaluating deterrence effect of Japanese sex offender treatment program for male offenders
Research Type	KAKENHI Research
Consignor	Japan Society for the Promotion of Science
Research Program Type	Grant-in-Aid for Scientific Research (C)
KAKENHI Grant No.	26380926
Keyword	sexoffenders, treatment effect, survival analysis, propensity score
KAKENHI Category	Clinical psychology Social psychology
Responsibility	Research Contributor
Representative Person	Yoshikazu YUMA Professor at Hyogo University of Teachers Education
Details	This study, based on the data obtained by tracing 598 sex offenders held in prisons all over Japan for 3-5 years after being released, analyzed the recidivism deterrence effect of the sex offender treatment program (hereinafter referred to as the program). It was evaluated by a parametric survival analysis after removing the influence of confounding factors using the propensity score analysis. We found the following: (1) the course of recidivism was different between those who were imprisoned for molesting (perverted group) and those who were not (non-perverted group); (2) in the molester group, the program had a significant recidivism suppression effect; (3) The non-molester group has a program effect up to about 500 days after the release; (4) the molester group has a higher recidivism rate than the non-molester group regardless of whether or not they took the program.