Effectiveness of school-based programs to reduce bullying perpetration and victimization: an updated systematic review and meta-analysis

Literature Reviews
p. 1-102
Periodical title
Campbell Systematic Reviews, 17, 2 (2021)

Bullying is a ubiquitous form of aggression in schools worldwide. Intervention and prevention programs targeting school bullying perpetration and victimization are effective, yet more research is needed to understand variability in effectiveness. This review provides an updated synthesis of school-based anti-bullying programs. The aim of this review is to summarise findings from studies of the effectiveness of school-based anti-bullying programs in reducing both bullying perpetration and victimization will be reported. The review summarizes 100 studies, with the largest number being from the USA. The main findings of our review are that anti-bullying programs were effective in reducing bullying perpetration outcomes by roughly 18-19% and bullying victimization by roughly 15-16%. There are substantial variations in effects, and the reasons for these variations require further research.

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