Hi Maegan,
There are a few aspect to ponder here.
Maybe the first thing to do is to rerun 3dFWHMx after removing any existing "3dFWHMx.1D" text files. There is an error message about failing to overwrite, so it is possible the values in that file are old and inappropriate.
Either way, those blur sizes look pretty small. What blur was applied in the preprocessing of subject data, and was afni_proc.py used for that?
Maybe we can ponder other aspects after resolving these 2 questions.
- rick