Parent meetings, firm disciplinary methods, and improved playground supervision are program elements associated with decreases in bullying and victimization¶

Claim · All claims
Evidence · 1 study · quant-synthesis r2 · q3
Currency · newest study 2011 · checked against its sources 2026-10-20 (automated, 1 of 1 entry) · not reviewed by a person

Subclaims¶

Reading the evidence codes

q is the design tier, i the impact, n the sample, and the kind with its r the rigour judged within that kind: what each code means.

This claim: no standardized effect is recorded in observations/ for it yet, so no benchmark reading is possible.

q3 i? Programs including parent meetings, firm disciplinary methods, and improved playground supervision were more effective. → Maria M. Ttofi 2011

Evidence¶

Maria M. Ttofi 2011¶

Maria M. Ttofi, David P. Farrington. (2011). Effectiveness of school-based programs to reduce bullying: a systematic and meta-analytic review. J Exp Criminol. https://doi.org/10.1007/s11292-010-9109-1

q3 · i? · quant-synthesis · r2

Program-element moderator analysis in the meta-analysis, drawing on "feedback from researchers about the coding of 40 out of 44 programs". Programs with these three elements were associated with decreases in bullying and victimization; no element-level effect size is printed.

"as were programs including parent meetings, firm disciplinary methods, and improved playground supervision"

Discussion¶

Learner Variables¶

Safety — outcome: instruction changes it

More intensive anti-bullying programs are more effective — related
School-based anti-bullying programs decrease victimization by 17-20% on average — a broader claim this one bears on
Work with peers in anti-bullying programs is associated with an increase in victimization — related
School-based anti-bullying programs reduce bullying perpetration and victimization globally — a broader claim this one bears on
Effectiveness of anti-bullying programs varies significantly across evaluations (heterogeneity) — related
School-based anti-bullying programs are effective overall, decreasing bullying by 20-23% on average — a broader claim this one bears on

Page metadata

Field	Value
`type`	`claim`
`id`	`parent-meetings-discipline-playground-supervision-reduce-bullying`
`title`	`Parent meetings, firm disciplinary methods, and improved playground supervision are program elements associated with decreases in bullying and victimization`
`description`	`Parent meetings, firm disciplinary methods, and improved playground supervision are program elements associated with decreases in bullying and victimization`
`status`	`review`
`evidence_strength`	`moderate`
`newest_evidence`	`2011`
`source_checked`	`2026-10-20`
`generated`	by `process:wiki-ingest` on `2026-10-15`
`trust`	unverified — no one has confirmed this page's content
`sources`	1 — `maria-m-ttofi-2011`

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