Correction for multiple comparisons
I would like to conduct post hoc tests to verify the hypotheses concerning the interaction effect. There is no problem if they are to compare the level of the within factor, in each of the between groups. However, when I would like to make comparisons between groups, but inside the within factors, a correction for multiple comparisons will be required. I have read an article about such corrections (https://psyarxiv.com/s56mk) and I understand that there is such a possibility, but the problem arises from the technical side, hence the question - are you familiar with packages or maybe sample scripts where for a similar scheme a multiple comparison correction for an interaction effect has been implemented?