I would like to change the mask used for a first level fMRI model. The default
mask seems to be missing some voxels and so I wanted to replace it with a
more inclusive explicit mask, but if I specify an explicit mask, the result is a
mask where a conjunction has been applied for the default mask settings and
the explicit mask. Is there a way to specify an explicit mask only?
Alternatively, I've seen postings where people have mentioned changing the
mask threshold to 0.01 to get all voxels, and then specifying an explicit mask.
Is this a good idea? Where does one find the mask threshold setting in SPM5?