My study “needs to be powered to detect individual group comparisons, not simply the omnibus ANOVA because this is where the hypotheses will ultimately be tested” (feedback I received from a proposal reviewer). The hypotheses is that group membership will be predicted by score on outcome measures being used.
I had initially ran my power analysis based on an omnibus anova for three groups using three measures, however, it seems as though this is not correct. Does anyone have any ideas as to how to better meet the reviewers comment?