I am currently going through the hyperalignment tutorial with fMRIprep outputs, and am wondering what masking should I be using for each dataset? To my understanding, I am looking at using the brain mask from the specific subject, but I believe that creates masked data that have different number of features across subjects. Would this be an issue?
Or instead, is there a template for fmri data? Is it a fair assumption that hyperalignment would want datasets to be masked the same way? Thanks!