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Old Hat(tie)? Some things you ought to know about effect sizes

Jan 24, 2014 | Category: myths
Ever since Hattie published Visible Learning back in 2009 the Effect Size has been king. For those of you who don't know, an effect size is a mechanism for comparing the relative merits of different i...
#Dylan Wiliam #John Hattie #effect sizes #Ollie Orange

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