I shared this updated list of the effect sizes of 250+ influences on student achievement already on my Dutch blog, but I think many readers of this blog will appreciate me sharing them here too. Some of the effect sizes became less enormous since the 2017 update, e.g. collective teacher efficacy and Teacher estimates of achievement. I do want to give some advice when looking at this new overview. Hattie’s work has received more and more criticism, something we discuss in our new book on Urban Myths.
The most important mistake one can make, is to focus only on the statistic of the sole effect size. The complexity behind that sole number is much more relevant.
It’s a good thing that Hattie left the ranking behind him, because sometimes low-hanging fruit is as important if it doesn’t cost too much effort. I did notice one confusing mistake in the chart, concerning Teacher estimates of achievement which received a dark blue dot. This would mean “Potential to considerably accelerate student achievement”, but Hattie himself explained earlier on that the high score for this influence was because there was a high correlation and not because working on this influence yielded a better result.
Matching style of learning, a positive effect size? What does that mean?
[…] The updated list of effect sizes by John Hattie, but… […]
[…] to what we know about the learning effect of long summer vacation – the learning effect of which is Hattie – .02 – you can expect that the effect on learning can be negative on average if education is […]
[…] Het motto van Klaskit is ‘Niet alles werkt en niks werkt altijd’, maar in het geval van differentiatie is het antwoord nog een beetje complexer. Er zijn namelijk veel vormen van differentiatie. De keuze die onze kinderen maken voor studierichtingen bijvoorbeeld, is een vorm van differentiatie die nochtans door verschillende onderwijsdenkers verguisd wordt. Je zou zittenblijven (niet zo effectief) en versnellen (meer dan behoorlijk effectief) ook vormen va…. […]
[…] blog, From Experience to Meaning… had a helpful graphic with all 256 factors analyzed by John Hattie. The PDF was enormous, so we shrunk it down into […]
[…] rather than a net negative impact on student learning? The blog, From Experience to Meaning… had a helpful graphic with all 256 factors analyzed by John Hattie. The PDF was enormous, so we shrunk it down into […]
[…] The updated list of effect sizes by John Hattie, but… […]
[…] The update list of effect sizes by John Hattie, but… […]