Effect sizes were higher for interventions with a total cost between £250k and £750k than for interventions that were more or less expensive¶
Claim · All claims
Evidence · 1 study · quant-synthesisr?·q3
Currency · newest study 2021 · not yet checked against its sources · 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? Primary ITT, secondary ITT and FSM effect sizes were higher for interventions in the middle total-cost band (£250k–£750k) than for cheaper or more expensive interventions. → Demack 2021
Evidence¶
Demack 2021¶
Demack, S., Maxwell, B., Coldwell, M., Stevens, A., Wolstenholme, C., Reaney-Wood, S., Stiell, B., & Lortie-Forgues, H. (2021). Review of EEF projects: Evaluation report. Education Endowment Foundation. https://eric.ed.gov/?id=ED625480
q3 · i? · quant-synthesis · r?
Subgroup meta-analysis of effect sizes by total intervention cost across the EEF trials. The review reports higher effect sizes for the £250k–£750k band "compared with interventions that were more or less expensive"; no effect size is printed for the contrast.
"On average, primary ITT, secondary ITT and FSM effect sizes were higher for interventions with a total cost of between £250k and £750k compared with interventions that were more or less expensive."
Discussion¶
Related Claims¶
- Interventions with an English curriculum focus were associated with higher primary ITT effect sizes than maths or cross-curriculum focus, while maths focus was associated with higher secondary ITT effect sizes — related
- Interventions located in one or up to three geographical areas showed higher primary ITT and FSM effect sizes than interventions spread across more areas — related
- TA-led interventions were associated with higher primary ITT and FSM effect sizes than other interventions, a pattern not observed for secondary ITT effect sizes — related
- Across 82 EEF RCT evaluations, overall meta-analysis weighted mean effect sizes were small: +0.04 SD for primary ITT, +0.01 SD for secondary ITT, and +0.03 SD for FSM subsample attainment outcomes — related
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