[FieldTrip] cluster analysis correlation
inieuwenhuis at berkeley.edu
Wed Feb 20 00:59:13 CET 2013
I've computer correlations (kendall's tau) between EEG power and a
behavioral measure over participants (made my own statfun using corr).
Now I'd like to use the cluster randomization framework to correct for
multiple comparisons. I think it would be valid to shuffle the
assignment of EEG power to behavioral measure (which is specified in
cfg.design for correlation), make a distribution and test my
correlations against that. So shuffle the data so that say EEG power of
subect1 get's linked to behavioral measure of subject3, subject2 to
subject6 etc, etc, just as we do with t-values shuffling who belongs to
1) is this implemented in FieldTrip? How would I do this? Cause the
design needs to be shuffled now, this is different from how it would
work for a t-test no?
2) If 1== false, Anyone done this, got some tips?
3) Is the above approach I suggest statistically valid? I think testing
the tau against zero is not valid (seeing if it is significantly
different from zero by making some dummy stat with zeros), but what I
suggest is, anyone any thoughts?
Ingrid Nieuwenhuis PhD
Sleep and Neuroimaging Laboratory
Department of Psychology
University of California, Berkeley
Tolman Hall, room 5305
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