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ERIC Number: EJ1033090
Record Type: Journal
Publication Date: 2014-Aug
Pages: 21
Abstractor: As Provided
Reference Count: 36
ISSN: ISSN-1076-9986
Standardized Mean Differences in Two-Level Cross-Classified Random Effects Models
Lai, Mark H. C.; Kwok, Oi-Man
Journal of Educational and Behavioral Statistics, v39 n4 p282-302 Aug 2014
Multilevel modeling techniques are becoming more popular in handling data with multilevel structure in educational and behavioral research. Recently, researchers have paid more attention to cross-classified data structure that naturally arises in educational settings. However, unlike traditional single-level research, methodological studies about multilevel effect size have been rare and those that have recently appeared had an emphasis on strictly hierarchical data structure. This article extends the work on multilevel standardized mean differences from strictly hierarchical structure to both fully and partially cross-classified structures. Analytically derived formulae for calculating effect sizes and the corresponding sampling variances (or standard errors) are presented, verified by simulation results, and illustrated with real data examples. Implications for primary research studies and meta-analyses are discussed.
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Publication Type: Journal Articles; Reports - Research
Education Level: N/A
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A