Literaturnachweis - Detailanzeige
| Autor/inn/en | Tipton, Elizabeth; Pustejovsky, James E. |
|---|---|
| Institution | Society for Research on Educational Effectiveness (SREE) |
| Titel | Small-Sample Adjustments for Tests of Moderators and Model Fit in Robust Variance Estimation in Meta-Regression |
| Quelle | (2015), (9 Seiten)
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| Sprache | englisch |
| Dokumenttyp | gedruckt; online; Monographie |
| Schlagwörter | Randomized Controlled Trials; Sample Size; Effect Size; Hypothesis Testing; Regression (Statistics); Robustness (Statistics); Mathematical Models; Simulation; Statistical Bias; Sampling; Economics; Hierarchical Linear Modeling; Meta Analysis |
| Abstract | Randomized experiments are commonly used to evaluate the effectiveness of educational interventions. The goal of the present investigation is to develop small-sample corrections for multiple contrast hypothesis tests (i.e., F-tests) such as the omnibus test of meta-regression fit or a test for equality of three or more levels of a categorical moderator. Drawing on work that addresses related, simpler problems and special cases of cluster-robust variance estimation, the authors develop three small-sample tests based on different approximations to the distribution of a robust Wald test statistic. In the remainder of the study, the authors describe their modeling assumptions, proposed tests, and some initial simulation result. These approximations are drawn from a wide array of areas within statistics, ranging from econometrics to survey sampling. The paper presents both new analytic work describing these small-sample corrected test statistics and the results of a large simulation study that compares these potential solutions, as well as a discussion of the implications of our findings for practice. Tables and figures are appended. (ERIC). |
| Anmerkungen | Society for Research on Educational Effectiveness. 2040 Sheridan Road, Evanston, IL 60208. Tel: 202-495-0920; Fax: 202-640-4401; e-mail: inquiries@sree.org; Web site: http://www.sree.org |
| Erfasst von | ERIC (Education Resources Information Center), Washington, DC |
| Update | 2020/1/01 |
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