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DOI: 10.1177/0013164487474009 The Graphical Representation of Quantitative Research Synthesis Residual VariationSchool of Education, Boston College In the process of fitting a quantitative synthesis model the assumption of homogeneous effect size variation is typically assessed through omnibus test statistics. Whether individual studies fit the model may be answered by testing the extent to which the sample estimates deviate from the modelled population estimate. It is proposed that graphical representations may facilitate the analysis of effect size residual variation. This strategy is applied to data concerning techniques for the teaching of writing composition skills.
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