John Hattie's reseach

John Hattie developed a way of synthesizing various influences in different meta-analyses according to their effect size (Cohen’s d). In his ground-breaking study “Visible Learning” he ranked 138 influences that are related to learning outcomes from very positive effects to very negative effects. Hattie found that the average effect size of all the interventions he studied was 0.40. Therefore he decided to judge the success of influences relative to this ‘hinge point’, in order to find an answer to the question “What works best in education?”

John Hattie updated his list of 138 effects to 150 effects in Visible Learning for Teachers (2011), and more recently to a list of 195 effects in The Applicability of Visible Learning to Higher Education (2015). His research is now based on nearly 1200 meta-analyses – up from the 800 when Visible Learning came out in 2009. According to Hattie the story underlying the data has hardly changed over time even though some effect sizes were updated and we have some new entries at the top, at the middle, and at the end of the list.

Evidence-Based Strategies

Overview of Hattie.mp4

In John Hattie's ground-breaking study “Visible Learning,” he ranked 150 influences that were related to learning outcomes from very positive effects to very negative effects. The positive effects can accelerate student learning when greater than 0.40 (a.k.a. hinge point). The strategies above 0.40 are considered “highly effective.”

effect sizes - visible learning metax

http://www.visiblelearningmetax.com/Influences

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