Work mostly by CE other than CORE (for which, see : www.coresystemtrust.org.uk)
Sensitivity to change can be measured in different ways but probably the most common are to report the mean change, ideally with its 95% confidence interval (CI) but another common approach is to report the effect size of the change (again ideally with the CI, though this is despicably rare!) There is a complication that reports that give the effect size often say they are using Cohen’s d as their measure of effect size without saying which of Cohen’s d values they are using: the issue is that change is a “paired” or “within person” measure and the Cohen’s d that is most often used for effect size is for comparison between groups. More on that here later!
Effect sizeConfidence intervalCohen’s dPaired tests / within person tests
I hope to put up some simulations illustrating the Cohen’s d2 and dz and an app allowing people to put in change data and get a full set of change analyses.
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