Effectiveness of public sex offender registries

Scientific evidence to support the effectiveness of sex offender registration policies in the United States is limited and mixed.Sex offender registration and notification (SORN) laws are highly accepted by the public, who believe that knowing the location of sex offenders residence may improve their ability to guard themselves and their children from sexual victimization. Empirical observations do not typically support this assumption, however. According to the Office of Justice Programs' SMART Office, sex offender registration and notification requirements arguably have been implemented in the absence of empirical evidence regarding their effectiveness. Majority of research results do not find statistically significant shift in sexual offense trends following the implementation of sex offender registration and notification (SORN) regimes. A few studies indicate that sexual recidivism may have been lowered by SORN policies, while a few have found statistically significant increase in sex crimes following SORN implementation. According to Association for the Treatment of Sexual Abusers, the states (e.g. Minnesota, Washington) where community notification has indicated of having some effectiveness employ empirically derived sex offender risk assessment procedures and apply public notification only on high risk offenders. Some policies — especially residency restrictions and community notification — may adversely impact on public safety due to the obstacles they create to successful reintegration of an offender.

It has been suggested that sex offender registration and notification (SORN) policies may be a specific deterrent for sex offenders; that it would facilitate sex offender awareness, monitoring, and apprehension; and that it would in the end help prevent sex offenses—particularly repeat sex offenses—from occurring. While these hypotheses were not empirically tested prior to the implementation of SORN requirements, a significant body of research using various methods has since examined the impact of SORN, particularly in relation to recidivism.

...
Wikipedia