An effect size measure that has really, or should have, replaced Cohen’s d as it corrects for the fact that Cohen’s d for any sample overestimates the population effect size overestimating far more with small n. It is “Hedges’s” with two “s”s as the name of the man who first described and explained it was “Hedges” not “Hedge”!
Details #
My Rblog post: Hedges’s g and Cohen’s d is all about this!
Try also #
Chapters #
We didn’t put it in the book but Chapter 8 and service comparisons would probably be where you might encounter effect sizes.
Online resources #
My Rblog post about Hedges’s g and Cohen’s d
My shiny app that will give you the correct value of g given values of d and n
Dates #
First created 21.i.24.
