Tag archief: effect size

How to engage in pseudoscience with real data: a criticism of John Hattie’s Visible Learning

24 augustus 2017 door Dick van der Wateren 1 reactie

This post refers to an article by Canadian statistician Pierre-Jérôme Bergeron in McGill Journal of Education / Revue des sciences de l’éducation de McGill John Hattie’s work, and particularly his seminal book Visible Learning, ranks among the best cited publications in education research. To many, the results of his many meta-analyses of more than 50,000 […]

Lees verder →
evidence-based, onderwijs, onderzoek
,

Hattie’s research: egregious errors

5 december 2014 door Dick van der Wateren 3 reacties

Originally posted on Networkonnet:
The egregious errors that beset John Hattie’s research are so pervasive as to prove difficult to encompass and thus lay bare – but various insights local and international are at last coming together to achieve just that. This posting argues that this coming together will reveal there is nothing about Hattie’s…

Lees verder →
English, evidence-based, onderwijs, onderzoek
, ,

Half of the Statistics in Visible Learning are wrong (Part 2)

25 september 2014 door Dick van der Wateren 1 reactie

In this second post about the statistics in ‘Visible Learning’, the author, British mathematician Ollieorange2, asks some uncomfortable questions about the self-correcting capacity of the education science community. For me, two questions remain: If half of the statistics are wrong, how does that affect the recommendations to teachers based on those statistics, and How much […]

Lees verder →
English, onderwijs, onderzoek
, , ,

John Hattie admits that half of the Statistics in Visible Learning are wrong

25 september 2014 door Dick van der Wateren 4 reacties

Originally posted on ollieorange2:
At the researchED conference in September 2013, Professor Robert Coe, Professor of Education at Durham University, said that John Hattie’s book, ‘Visible Learning’,  is “riddled with errors”. But what are some of those errors? The biggest mistake Hattie makes is with the CLE statistic that he uses throughout the book. In…

Lees verder →
English, evidence-based, onderwijs, onderzoek
,