> I have a set of subjects that, for various reasons, may have 'dead' voxels in different voxels in their EPI
> data, where dead voxels will very between subjects. (By 'dead' I mean unchanging and zero.)
Use option -zskip in 3dttest++ to deal with such 'dead' voxels. The approach assumes that you don't have any (at least not too many) voxels where the *true* value is 0. 3dMEMA -missing_data is another approach if you have t-value available.
> It's not clear to me how to interpret the 'constant input data' clause when voxel A can be constant for
> some subjects, but not others.
The 'constant input data' clause is not really related to your 'dead' voxel situation. More specifically it refers to the situation when *all* subjects have a constant value at a voxel.
Gang
Edited 1 time(s). Last edit at 09/23/2014 03:42PM by Gang.
