happy new year to everybody !!!!
I would need some info about the effect of masking a randomise analysis in conjunction with a TFCE correction.
by masking a map, thus investigating less voxels, I expect more significant results as the multiple comparison is performed over less voxels.
counter-intuitively (at least for me), when applying a certain mask I loose significant voxels, compared to unmasked analysis, even if the disappearing voxels are contained within the mask. the vanishing voxels are 99% close to the border of the mask. which is the reason? can i do anything to avoid this?
thanks in advance
regards
Alberto
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