Literaturnachweis - Detailanzeige
| Autor/inn/en | Polanin, Joshua R.; Tanner-Smith, Emily E.; Hennessy, Emily A. |
|---|---|
| Titel | Estimating the Difference between Published and Unpublished Effect Sizes: A Meta-Review |
| Quelle | (2016), (48 Seiten)
PDF als Volltext (1); PDF als Volltext kostenfreie Datei (2) |
| Zusatzinformation | Weitere Informationen |
| Sprache | englisch |
| Dokumenttyp | gedruckt; online; Monographie |
| DOI | 10.3102/0034654315582067 |
| Schlagwörter | Publications; Periodicals; Bias; Effect Size; Meta Analysis; Research Problems; Literature Reviews; Information Dissemination; Coding; Robustness (Statistics); Regression (Statistics); Educational Research; Psychology |
| Abstract | Practitioners and policymakers rely on meta-analyses to inform decision-making around the allocation of resources to individuals and organizations. It is therefore paramount to consider the validity of these results. A well-documented threat to the validity of research synthesis results is the presence of publication bias, a phenomenon where studies with large and/or statistically significant effects, relative to studies with small or null effects, are more likely to be published (Rothstein, Borenstein, & Sutton, 2005). We investigated this phenomenon empirically by reviewing meta-analyses published in top tier journals between 1986-2013 that quantified the difference between effect sizes from published and unpublished research. We reviewed 383 meta-analyses of which 81 had sufficient information to calculate an effect size. Results indicated that published studies yielded larger effect sizes than those from unpublished studies (d-bar = 0.18, 95% CI [0.10, 0.25]). Moderator analyses revealed that the difference was larger in meta-analyses that included a wide range of unpublished literature. We conclude that intervention researchers require continued support to publish null findings and that meta-analyses should include unpublished studies to mitigate the potential bias from publication status. [This article was published in: "Review of Educational Research" v86 n1 p207-236 Mar 2016 (EJ1090515).] (As Provided). |
| Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
| Update | 2020/1/01 |
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