Effect Sizes in Three-Level Cluster-Randomized Experiments

Autor/in	Hedges, Larry V.
Titel	Effect Sizes in Three-Level Cluster-Randomized Experiments
Quelle	In: Journal of Educational and Behavioral Statistics, 36 (2011) 3, S.346-380 (35 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Zusatzinformation	Weitere Informationen
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	1076-9986
DOI	10.3102/1076998610376617
Schlagwörter	Effect Size; Research Design; Experiments; Computation; Error of Measurement; Correlation; Sample Size; Meta Analysis + Suchen Sie Ihr Suchwort? Forschungsdesign; Erprobung; Messfehler; Korrelation; Meta-analysis; Metaanalyse
Abstract	Research designs involving cluster randomization are becoming increasingly important in educational and behavioral research. Many of these designs involve two levels of clustering or nesting (students within classes and classes within schools). Researchers would like to compute effect size indexes based on the standardized mean difference to compare the results of cluster-randomized studies with other studies and to combine information across studies in meta-analyses. This article addresses the problem of defining effect sizes in designs with two levels of clustering and computing estimates of those effect sizes and their standard errors from information that is likely to be reported in journal articles. Five effect sizes are defined corresponding to different standardizations. Estimators of each effect size index are also presented along with their sampling distributions (including standard errors). (Contains 2 tables.) (As Provided).
Anmerkungen	SAGE Publications. 2455 Teller Road, Thousand Oaks, CA 91320. Tel: 800-818-7243; Tel: 805-499-9774; Fax: 800-583-2665; e-mail: journals@sagepub.com; Web site: http://sagepub.com
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10