[Eeglablist] Are the results more significant on the scalp or inside brain?
vavrecka at fel.cvut.cz
Mon May 12 14:02:23 PDT 2014
I do have few simple questions and I am curious about your intuitions
I am finishing the paper where I did group analysis of two cognitive
states. I visualized both scalp maps and dipoles and their statistical
tests. Both visualization are based on fieldtrip monte carlo permutation
with cluster based statistics (correction for multiple comparison). I
would like to interpret the difference between results on the scalp and
inside the brain (DIPFIT). What are your intuitions:
Should the effect be stronger (in terms of more statistically
significant electrodes (dipoles) and timeperiods) on scalp electrodes or
in DIPFIT clusters?
How to interpret the stronger effect on the scalp?
Does the ICA and DIPFIT calculation somehow weaken the ERSP difference?
My intuition is opposite as the source reconstruction has to clean the
noise and strengthen the effect that should result in more statistically
significant timeperiods in the spectrograms compared to scalp data?
Is there any paper that compares these two approaches?
Thanks for your answers.
Biodat Research Group
Incognite Research Unit
Karlovo nam. 13
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