Can you help? Surely someone has written about this question? Please let me know where! In the paired design, the two measures, for example Pretest and Posttest, are usually positively correlated. The SD of the paired differences (sdiff), is usually …
The Simple Paired Design: How Does the Correlation Relate to SD(diff)? Read more »
I recently posted about our DR article being accepted by BJMSP. It has now been published online, here. It’s behind a paywall, but here is the full pdf that we are allowed to share; it has only a few limitations, …
The Diamond Ratio (DR), Our Estimate of Heterogeneity: Now Published Online Read more »
I’m excited to report that Max Cairns’s PhD work on the Diamond Ratio (DR) has been accepted for publication by the British Journal of Mathematical and Statistical Psychology. The preprint of the final accepted version is here. The Original DR …
The Diamond Ratio (DR), Our Estimate of Heterogeneity: Accepted for Publication Read more »
Replacement heart valves, bypasses, transplants: Cardiac surgery research has given us these life-saving goodies, and more. Now this vital research field has joined many others in appreciating the damage that reliance on p values can bring. Our critical review (here) …
Cardiac Surgery: Yet One More Research Field Highly Critical of p Values 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 »