Intraclass Correlation Values for Planning Group-Randomized Trials in Education

Autor/inn/en	Hedges, Larry V.; Hedberg, E. C.
Titel	Intraclass Correlation Values for Planning Group-Randomized Trials in Education
Quelle	In: Educational Evaluation and Policy Analysis, 29 (2007) 1, S.60-87 (28 Seiten)Infoseite zur Zeitschrift PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0162-3737
DOI	10.3102/0162373707299706
Schlagwörter	Educational Research; Academic Achievement; Correlation; Experiments; Sample Size; Statistical Analysis; Intervention; Elementary Secondary Education; Low Achievement; Socioeconomic Status; Probability; Mathematics Achievement; Reading Achievement; Effect Size; Pretests Posttests; Reading Tests; Mathematics Tests; Comprehensive Tests of Basic Skills; Early Childhood Longitudinal Survey + Suchen Sie Ihr Suchwort? Bildungsforschung; Pädagogische Forschung; Schulleistung; Korrelation; Erprobung; Statistische Analyse; Unterdurchschnittliche Leistung; Socio-economic status; Sozioökonomischer Status; Wahrscheinlichkeitsrechnung; Wahrscheinlichkeitstheorie; Mathmatics sikills; Mathmatics achievement; Mathematical ability; Mathematische Kompetenz; Leseleistung; Lesetest
Abstract	Experiments that assign intact groups to treatment conditions are increasingly common in social research. In educational research, the groups assigned are often schools. The design of group-randomized experiments requires knowledge of the intraclass correlation structure to compute statistical power and sample sizes required to achieve adequate power. This article provides a compilation of intraclass correlation values of academic achievement and related covariate effects that could be used for planning group-randomized experiments in education. It also provides variance component information that is useful in planning experiments involving covariates. The use of these values to compute the statistical power of group-randomized experiments is illustrated. (Contains 11 tables.) (Author).
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Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10