Bystander programs increase bystander intervention but no effect on perpetrating sexual assaultBystander sexual assault prevention programs have beneficial effects on bystander intervention but there is no evidence of effects on sexual assault perpetration.Effects on knowledge and attitudes are inconsistent across outcomes. | What is this review about?Sexual assault is a significant problem among adolescents and college students across the world.One promising strategy for preventing these assaults is the implementation of bystander sexual assault prevention programs, which encourage young people to intervene when witnessing incidents or warning signs of sexual assault.This review examines the effects bystander programs have on knowledge and attitudes concerning sexual assault and bystander behavior, bystander intervention when witnessing sexual assault or its warning signs, and participants' rates of perpetration of sexual assault. What is the aim of this review?This Campbell systematic review examines the effects of bystander programs on knowledge and attitudes concerning sexual assault and bystander intervention, bystander intervention when witnessing sexual assault or its warning signs, and the perpetration of sexual assault.The review summarizes evidence from 27 high-quality studies, including 21 randomized controlled trials. | WHAT ARE THE MAIN FINDINGS OF THIS REVIEW? | What studies are included?This review includes studies that evaluate the effects of bystander programs for young people on (a) knowledge and attitudes concerning sexual assault and bystander intervention, (b) bystander intervention behavior when witnessing sexual assault or its warning signs, and (c) perpetration of sexual assault.Twenty-seven studies met the inclusion criteria.These included studies span the period from 1997 to 2017 and -------------------------------
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