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The Big Picture in Bilingual Education: A Meta-Analysis Corrected for Gersten's Coding Error
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Rolstad, Kellie; Mahoney, Kate; Glass, Gene V. – Journal of Educational Research & Policy Studies, 2008
In light of a recent revelation that Gersten (1985) included erroneous information on one of two programs for English Language Learners (ELLs), the authors re-calculate results of their earlier meta-analysis of program effectiveness studies for ELLs in which Gersten's studies had behaved as outliers (Rolstad, Mahoney & Glass, 2005). The correction…
Descriptors: Bilingual Education, Second Language Learning, Program Effectiveness, Effect Size