Diederick Stoffers d.stoffers at VUMC.NL
Thu Apr 26 14:08:09 CEST 2007

Dear all,

As a relative newbie to fieldtrip, just followed the 3.5 day course, I am 
having trouble performing trial definition.

Experiment: Simple Eriksen flanker task in CTF 151-channel MEG environment, 
80 patients and 20 controls
Trials: 80 congruent and 80 incongruent
Trial definition: 1s prestimulus and 1.2 second poststimulus (-1.0 to 2.2s)
Trial contains stimulus marker and marker for trialtype at t=0, no triggers

The CTF dataset has been modified and now contains 160 trials with a length 
of 3.2 seconds and two markers (stimulus onset and trialtype) at 1 second 
into the trial as well as a marker for artefacts.

Could anyone please advice what to include in mytrialfun.m ? Is it only 
possible to use triggers (in that case I will have to convert markers to 
triggers) or can I also use the information in MarkerFile.mrk? I have 
attached a trialfun.m file which holds some of the information.


Diederick Stoffers.    


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.

More information about the fieldtrip mailing list