Thanks Benjamin and Andreas for your input. I guess my design is OK with the 3rd EV being the confound (ie for the ones with a different imaging matrix)? Would be great if you could comment on that as I am a bit paranoid and not very experienced setting up these kind of things. See attachment.
Benjamin, I tried the GUI first, but for some participants there's no fieldmap available so I need to preprocess them individually...
OK thanks in advance and sorry for being such a pedant.
Torsten
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