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Pedagogy Non-Grata
Chat with Dylan Wiliam: Debates on Meta-Analysis
Apr 17, 2024
Dylan Wiliam, a renowned education and assessment scholar, dives into the intricacies of meta-analysis and effect sizes. He critiques traditional metrics in educational research, emphasizing the importance of rigorous evaluations and transparency. The discussion covers the nuances of interpreting effect sizes and the significance of preregistration and replication for trustworthy results. Wiliam also debates the merits of randomized controlled trials versus meta-analyses, using real examples to illustrate how context influences educational interventions.
01:06:39
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Quick takeaways
- Meta-analysis enhances educational research by systematically evaluating studies, yet lacks agreed-upon metrics for effect sizes across contexts.
- Effect sizes in education must be interpreted cautiously, as varying study quality and assessment types can lead to misleading conclusions.
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The Role of Meta-Analysis in Education
Meta-analysis serves as a systematic method for reviewing and synthesizing evidence in educational research. It addresses the limitations of earlier literature reviews by not only tallying studies but also measuring the strength of findings across varied contexts. Unlike in medicine, where specific metrics are agreed upon, educational research lacks consensus on effect measurements, impacting the validity of comparisons. This inconsistency in metrics necessitates discussions around the appropriateness and interpretability of effect sizes in educational meta-analyses.
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