Note: the numerical values i.e shown as decimal numbers, are various effects on student achievement. The scale is expressed in effect size (or standard deviation units) such that 1.0 is an unlikely - although a very obvious - change in achievement, and 0.0 is no change at all. This continuum provides the measurement basis to address the question of the relative effects of many factors on achievement. Effect size of 0.4 is called the hinge point by the author (i.e the statistically significant effect).

Still reading Visible Learning, A Synthesis of over 800 Meta-Analyses Relating to Achievement by John Hattie's chapter 3. Quote, "The aim of this book is not to overwhelm with detail from the more than 50,000 studies and 800+ meta-analyses that form the basis of the discussion." In reality, I am totally ovewhelmed by the collosal amount of data and discussions, especially the number of variables considered in the meta-analyses. To overcome some of the difficulty in comprehension, I transferred values provided in the book to a Google Sheet and produced number of summarised visual displays which I would like to share with others via this blog post. To me, all these displays showed interesting points.
Note: the numerical values i.e shown as decimal numbers, are various effects on student achievement. The scale is expressed in effect size (or standard deviation units) such that 1.0 is an unlikely - although a very obvious - change in achievement, and 0.0 is no change at all. This continuum provides the measurement basis to address the question of the relative effects of many factors on achievement. Effect size of 0.4 is called the hinge point by the author (i.e the statistically significant effect).
2 Comments
Debbieb
1/10/2017 09:41:34 pm
Enjoyed reading through your blog. Your graphs and diagrams of Hattie's effect sizes helped to clarify what is most effective and worth focusing on. Also interesting to find out about Hattie's maths book.
Reply
Nazmul Bashar
1/29/2017 08:11:44 pm
Thank you Debbie for your comments. John Hattie has updated his Meta-data in 2016.
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