The APS has just given a kick along to what’s most likely a myth: The Lucky Golf Ball. Alas! Golf.com recently ran a story titled ‘Lucky’ golf items might actually work, according to study. The story told of Tiger Woods …
The Myth (?) of the Lucky Golf Ball Lives On, Alas Read more »
In ITNS we used ‘dunbiased’ to refer to the debiased estimate of Cohen’s δ, which is Cohen’s standardised effect size in the population. In UTNS I used ‘dunb’. But now ‘Hedges’s g’ seems to be gaining currency as a label …
What Should We Call Our Estimate of Cohen’s δ: d-unbiased, Hedges’ g, or Something Else? Read more »
A great new preprint by Marie Delacre (at Université Libre de Bruxelles, marie.delacre@ulb.be) and colleagues (Daniel Lakens, Christophe Ley, Limin Liu, & Christophe Leys) throws valuable light on this question. The title is: Why Hedges’ gs* based on the non-pooled …
Which Standardised Effect Size Measure Is Best When Variances Are Unequal? Read more »
A while back I posted (here) about the Diamond Ratio (DR), which is our simple visual indicator of the extent of heterogeneity in meta-analysis. (See ITNS, Chapter 9 for more on the DR.) I reported that Max Cairns, a PhD …