School Anti-Bullying Program Evaluations from 44 Studies Across 16 Countries

89 reports from a Campbell Systematic Review evaluate the effectiveness of school-based anti-bullying programs. The meta-analysis, led by David P. Farrington of the University of Cambridge, is based on 44 studies conducted between 1983 and mid-2009. Programs were found to reduce bullying by an average of around 20%.

Use Cases

• Meta-analyzing intervention effect sizes based on reported program outcomes.
• Comparing anti-bullying program effectiveness across different countries and study designs.
• Identifying research gaps for future evaluations based on the review's methodological recommendations.

Strengths

• Analysis is based on 44 studies from 16 different countries, providing international scope.
• Systematic review methodology included hand-searching 35 journals and searching 18 electronic databases.
• Includes only controlled studies such as randomized controlled trials and quasi-randomized trials.

Limitations

• Row count and specific column-level documentation are unknown; field semantics must be inferred after download.
• Data covers studies up to mid-2009; freshness for contemporary program evaluation is limited.
• Nine studies were excluded from the final meta-analysis due to insufficient data for effect size calculation.

Provenance

Source

Campbell Systematic Review authored by David P. Farrington, University of Cambridge.

Collection Method

Systematic review and meta-analysis of published and unpublished evaluations.

Time Range

1983 to mid-2009

Geography

16 different countries