Re: Equation for repeated measures effect size
« Reply #4 on: 17 February, 2011, 05:56:21 AM »
My pleasure. I've just looked at the picture I attached and it's not that clear. It should be:
correlated t-statistic multiplied by Square-root of ((2(1-r))/n).
On a side note: We will be submitting a paper ourselves soon which demonstrates that Hedges' g is a better approximation, under most circumstances, that Dunlap's equation (the one above - which is usually recommended for correlated designs).