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Can Research Design Explain Variation in Head Start Research Results? A Meta-Analysis of Cognitive and Achievement Outcomes
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Shager, Hilary M.; Schindler, Holly S.; Magnuson, Katherine A.; Duncan, Greg J.; Yoshikawa, Hirokazu; Hart, Cassandra M. D. – Educational Evaluation and Policy Analysis, 2013
This study explores the extent to which differences in research design explain variation in Head Start program impacts. We employ meta-analytic techniques to predict effect sizes for cognitive and achievement outcomes as a function of the type and rigor of research design, quality and type of outcome measure, activity level of control group, and…
Descriptors: Meta Analysis, Preschool Education, Disadvantaged Youth, Outcome Measures
Quality of Research Design Moderates Effects of Grade Retention on Achievement: A Meta-Analytic, Multilevel Analysis
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Allen, Chiharu S.; Chen, Qi; Willson, Victor L.; Hughes, Jan N. – Educational Evaluation and Policy Analysis, 2009
The present meta-analysis examines the effect of grade retention on academic outcomes and investigates systemic sources of variability in effect sizes. Using multilevel modeling (MLM), the authors investigate characteristics of 207 effect sizes across 22 studies published between 1990 and 2007 at two levels: the study (between) and individual…
Descriptors: Research Design, Grade Repetition, Academic Achievement, Effect Size
Follow Through Revisited: Reflections on the Site Variability Issue.
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Gersten, Russell – Educational Evaluation and Policy Analysis, 1984
Conclusion about site-specific determinants of educational outcomes of the controversial longitudinal evaluation of the Follow Through programs (1976) are challenged again by reexamining the Direct Instruction model data. Reanalysis confirms earlier critiques and supports more recent research funding on the relationship between types of…
Descriptors: Educational Environment, Elementary Education, Evaluation Methods, Mathematics Achievement