averaging across subjects
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sophie....@gmail.com
Nov 9, 2016, 4:43:12 PM11/9/16
to Princeton MVPA Toolbox for Matlab
Dear all,
After extensively reading the amazing tutorials associated with the toolbox (thanks!), I just ran my first MVP analyses on 10 subjects (4 runs each), using a whole-brain mask. It seemed to work properly. Now, I would like to average the performance of my classifier across all runs, then across all subjects, and to project the results on a brain template. Following the "ebc" tutorial, I managed to average some of the fields from the "results" matrix, but the result cannot be visualized on a standard map (for that it seems that I need to average the "subj" matrix instead). How shall I proceed? I'm using SPM but I'll be willing to switch to AFNI if needed.
Thanks for your help,
Sophie
Greg Detre
Jan 1, 2017, 4:39:00 PM1/1/17
to mvpa-t...@googlegroups.com
Hi Sophie,
I'm afraid I can't respond to your question in detail, but you might find pointers here:
From memory, you need to 1) create a pattern which contains a value for each voxel (your overlay) which you can then 2) plot on top of an anatomical underlay.
I can't remember if interpret_weights.m is an old script that got superseded, but you might also find some clues in that.
Good luck!
g
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