[FieldTrip] When/how do you bring together data from multiple blocks within a single participant.

Hanson, Gavin Keith ghanson0 at ku.edu
Thu Mar 5 05:01:45 CET 2015

This is undoubted a straightforward issue, but I can’t seem to find any reference to it in the fieldtrip documentation. 
Our scanning protocol for each participant involved 6 runs of around 8 minutes in length, each of which is saved as a separate CTF dataset, and each of which begins with head localization (no continuous head position data).

My main question is, when do I bring these blocks together into a single participant dataset?

Do I just clean the data, then append it all together before launching in on the time-frequency analysis? Do I perform a time-frequency analysis within each block and then bring it all together later? How do I “align" my data to a specific head position that can hold for all blocks within a participant prior to topographical plotting / source reconstruction?
If anyone can point me to where these answers may be, I would be very grateful, but I can’t find an answer to this anywhere. 

If it matters, our ultimate goal is to use beamforming to localize task-associated oscillatory responses during a cognitive task.

Thanks in advance for your help, and let me know if you require further information.

Gavin Hanson, B.S.
Research Assistant
Department of Psychology
University of Kansas
1415 Jayhawk Blvd., 534 Fraser Hall 
Lawrence, KS 66045

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