Hi all,
I have been trying to examine group differences in FA using groupttest. I
am using a white matter mask to limit my analysis to that tissue
compartment. The command I used is:
groupttest --na=20 --nb=20 -m wmmask -o groupdiff <group a images> <group
b images>
I noticed that when I run the program, it only seems to test the voxels on
the edge of the mask (p-values, etc., are 0 inside the mask). Is this the
expected behavior? If so, what would be the best way to test these data?
Thanks and happy holidays,
Matt
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