[FieldTrip] cluster-based permutation test - baseline correction

Jose joseluisblues at gmail.com
Mon Jul 18 18:07:31 CEST 2016

dear community,

I'm performing analysis of CTF MEG data. I have two conditions of interest:
A and B, and I have performed spectral decomposition with the wavelet
method to obtain the power (frequencies from 1 to 50 Hz). I would like to
perform a cluster-based permutation test to assess if there are significant
power differences between my two conditions of interest between the onset
of my stimulus and 1 sec after,

While I understand the principles of cluster-based permutation test, with
their distinct versions: between trials, within trials and within subjects,
what I am interested in is to test differences between my two conditions in
their baseline-corrected versions. Since I haven't seen this procedure in
the tutorial, but it seems logic to me, I would like to verify the way to
proceed is do baseline correction (for each condition and subject) and then
run my cluster-permutation test. Is there anything else I should consider?

Also, since I haven't used 'demean' during my trial definition (I was
advised not to do this), I was wondering if this could impact my baseline
correction, and subsequent statistical analysis. I've seen some messages in
the forum referring to this procedure,

Thanks in advance,

-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://mailman.science.ru.nl/pipermail/fieldtrip/attachments/20160718/88a38535/attachment-0001.html>

More information about the fieldtrip mailing list