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RCT Testing Bystander Effectiveness to Reduce Violence.

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The Green Dot bystander intervention significantly reduced sexual violence perpetration and victimization in high schools. This program also decreased other forms of interpersonal violence, showing its broad effectiveness.

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Area of Science:

  • Public Health
  • Adolescent Health
  • Violence Prevention

Background:

  • Bystander intervention programs show promise for reducing college-level interpersonal violence.
  • Rigorous evaluations of bystander intervention effectiveness in high school settings are limited.
  • This study addresses the need for evidence on bystander programs in adolescent populations.

Purpose of the Study:

  • To evaluate the effectiveness of the Green Dot bystander intervention program.
  • To assess the program's impact on reducing sexual violence and related interpersonal violence among high school students.
  • To provide rigorous evidence for bystander intervention strategies in secondary education.

Main Methods:

  • A cluster randomized controlled trial (RCT) was conducted in 26 Kentucky high schools.
  • Schools were randomized to either an intervention group (Green Dot program) or a control (wait-list) group.
  • Anonymous student surveys collected data on violence perpetration and victimization from 2010 to 2014.

Main Results:

  • The Green Dot intervention led to significant reductions in sexual violence perpetration and victimization.
  • Prevalence rate ratios for sexual violence perpetration were lower in intervention schools (0.83 in Year 3, 0.79 in Year 4).
  • Similar positive effects were observed for sexual harassment, stalking, and dating violence perpetration and victimization.

Conclusions:

  • The Green Dot program effectively decreased sexual violence perpetration and victimization in high schools.
  • The intervention also showed significant reductions in other forms of interpersonal violence.
  • Findings support the widespread implementation of bystander intervention programs in high schools to combat youth violence.