calculate effect size for paired samples what is the square root of r why divide by square root when calculating effect size how to determine effect size for paired test when do you divide effect size how to calculate effect size for paired t test calculate effect size when calculating an effect size which is the difference between a paired t test and an observational t test? r if you need an effect size in paired t test do you need the square root of one r how to calculate effect size of the t test using r which is the square root of effect size can you calculate effect size in paired testing does r measure effect size how do you calculate effect size of t tests when you divide the t test by the square of 1-r, you are looking at a mean which is the operative effect size in the paired test what is operative effect size calculate operative effect size by dividing by the square root