[FieldTrip] EEG connectivity without averaging over the trials.

Julian Keil julian.keil at gmail.com
Wed May 18 18:59:05 CEST 2016

Dear Maggie,

As connectivity in principle relies on the correlation between trials (very
very very simplified), it's not possible to compute single trial

However, what has been done is taking the single-trial deviance from the
average phase as a measure of connectivity.

See Keil et al 2014, Cerebral Cortex or Hanslmayr et al 2007,
NeuroImage for a description.

Good Luck,


Am Mittwoch, 18. Mai 2016 schrieb Mengqi Xing :

> Dear all,
> I'm using fieldtrip to do dynamic EEG connectivity analyses and I have a
> few questions about trial averaging in ft_connectivityanalysis. I realized
> regardless which method I'm using, the ft_connectivityanalysis tends to
> averaging over trials (dimension rpt), which sacrifices the dynamic of  the
> data. Is it possible not let the function averaging over trials while still
> getting a meaningful result? ( I tried to duplicate trial and let it
> average itself and it reported some errors.)  Or is there a connectivity
> method that allows non-trial-averaging to run?  Thank you very much!
> Maggie Xing
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