coherence and inter-trial coherence questions

Matteo Demuru suforraxi at GMAIL.COM
Thu Sep 23 14:58:54 CEST 2010


I have two questions regarding statistical tests: first one regarding
coherence differences, second one pertaining testing inter-trial coherence.

We are analysing MEG data from an auditory experiment with 5 subjects. We
considered the deviant stimulus as the only stimulus in the recordings,
while the standard one was considered as baseline activity.

We analysed the TFR data in both designs: within-trial and within-subject
using respectively "actvsblT" and "depsamplesT" statistics. In both cases we
compared a time interval extracted from the baseline versus a time interval
from the deviant stimulus response.

We wish to assess coherence differences using "indepsampleZcoh" statistic in
both single-subject and multiple-subject cases. In a previous
Maris replied that this statistic only works in a between-trial design
(for single-subject case) and suggested to compare the different conditions
as they were un-paired.
We exploited this idea for the single-subject case and we would like to know
if it is legitimate to extend the same idea for the multiple-subject

Furthermore we would like to know if there is a way to test inter-trial
coherence differences in Fieldtrip?
In a previous post<>Stephan
suggested how to deal with the problem; is it already implemented?

Thanks in advance for your time


The aim of this list is to facilitate the discussion between users of the FieldTrip  toolbox, to share experiences and to discuss new ideas for MEG and EEG analysis. See also and
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