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Title of Article How to calculate effect sizes from published research articles: A simplified methodology
Will Thalheimer, Work-Learning Research
This article provides a simplified methodology for calculating Cohen’s d effect sizes from published experiments that use t-tests and F-tests. Accompanying this article is a Microsoft Excel Spreadsheet to speed your effect-size calculations. This file was updated in April, 2003 to deal more effectively with situations where the treatment-group mean is lower than the comparison-group mean. Both the article and the spreadsheet are available as free downloadable files. How can I get the article and spreadsheet?
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