[FieldTrip] Cluster based permutation post-hoc after ft_statfun_indepsamplesF

[Martin Gallagher]

Hello,

This is my first post to the group. I've Googled this question and have
seen it asked, but I'm still unsure of the definitive answer.

I have time frequency analyses of three groups (three seizure types --
absence, myoclonic, and tonic).  I am performing independent comparisons
tests of the three groups.  The data are organized as subjects X channel X
frequency   with 15-20 subjects in each group, 19 channels, and 19
frequencies (2-20 Hz) and only 1 time point.

I am using ft_statfun_indepsamplesF to determine differences among the
groups.  After performing this initial cluster-based permutation test, what
is the appropriate post-hoc.  I think if I did three pairwise
comparisons and made a  Bonferroni correction it would be too strict.
Would it be appropriate to use the electrode/frequency clusters identified
in the initial 3 way comparison as channels and frequencies of interest and
then perform three pairwise comparisons and multiply the resulting pairwise
p-values by 3?

Thank you!
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