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Same Difference? Understanding Variation in the Estimation of Effect Sizes from Educational Trials

Xiao, Z.; Higgins, S.; Kasim, A.

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Authors

Z. Xiao

A. Kasim



Abstract

By applying four analytic models with comparable outcomes and covariates to a dataset of 20 outcomes from 17 educational trials, we found results closely matching in well-powered studies without serious implementation problems. The interventions and evaluations were all funded by the Education Endowment Foundation and independently evaluated. We demonstrated that when an analysis takes little account of research design, or where there were difficulties with implementation and data collection, point estimates of effect differ and estimates of precision vary. This adds to the challenge of understanding the comparative impact of interventions and deciding which are worth scaling up.

Citation

Xiao, Z., Higgins, S., & Kasim, A. (2016). Same Difference? Understanding Variation in the Estimation of Effect Sizes from Educational Trials. International Journal of Educational Research, 77, 1-14. https://doi.org/10.1016/j.ijer.2016.02.001

Journal Article Type Article
Acceptance Date Feb 1, 2016
Online Publication Date Mar 15, 2016
Publication Date Mar 15, 2016
Deposit Date Feb 10, 2016
Publicly Available Date Mar 28, 2024
Journal International Journal of Educational Research
Print ISSN 0883-0355
Publisher Elsevier
Peer Reviewed Peer Reviewed
Volume 77
Pages 1-14
DOI https://doi.org/10.1016/j.ijer.2016.02.001

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