Calculate Hedges' g using within-group change data

Calculate Hedges' g based on change data. Only meant to be used as part of calculateEffectSizes.

Usage

g.change.m.sd(x, ...)

Arguments

x

data

...

Change score effect size data. Data frame must include columns mean_change_arm1, mean_change_arm2, sd_change_arm1, sd_change_arm2, n_change_arm1, n_change_arm2. See the Metapsy data standard.