John Hattie admits that half of the Statistics in Visible Learning are wrong (Part 2)

In an earlier post we discovered that John Hattie had admitted (quietly) that half of the Statistics in Visible Learning were incorrect. John Hattie uses two statistics in the book, the ‘Effect Size’ and the ‘CLE’. All of the CLEs are wrong through-out the book. Now, I didn’t really know why they were wrong, I … Continue reading John Hattie admits that half of the Statistics in Visible Learning are wrong (Part 2)