[FieldTrip] Quality of beamforming on MNI template vs single-subject MRI

Andrea Brovelli andrea.brovelli at univ-amu.fr
Thu Apr 4 16:31:29 CEST 2013

  Thanks a lot Jorn, I 'll try out the different methods you suggested 
to understand better at which step I loose significance.



Le 04/04/2013 14:50, "Jörn M. Horschig" a écrit :
> I am not sure as you provide minimalistic insight into what you are 
> exactly doing. If you use a single subject grid, the actual grid 
> points for which you estimate source activity will be slightly 
> different than when you base this on a template, so that might be one 
> reason. Also you are probably doing monte carlo statistics, for which 
> p-values will vary anyway for different runs (sidenote: check the 
> newly implemented p-value confidecen interval, if they are 
> overlapping, no need to worry). However, since you do not say how much 
> the p-values differ, how many permutations you are running, what other 
> parameters you choose etc., it's hard to judge whether this is 
> something to worry about. 


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