Dear AFNI community,

I'm doing a simple procedure and getting funky results.

I want to apply a single structure mask (ones where the structure is and zeros everywhere else) to a single subject's statistical data resulting from a contrast using 3dDeconvolve (output has six bricks, the brick of interest has t-test values).

So I type:

3dcalc -datum float -a mask+tlrc -b subject_contrast+tlrc -expr 'a*b' -prefix masked_subject_contrast

Following this, I would expect, provided both that the cursor was at a set location within my mask and that I have selected the proper sub-bricks, that the value for Overlay in the AFNI window should be the same for both subject_contrast+tlrc and masked_subject_contrast+tlrc. This is not the case, however. I've run this same procedure successfully with a mask and *group-level output* from 3dttest. Is there something different in the data structure in 3dDeconvolve output that I'm not getting? Happy to attach data as needed.

Please pardon any foolishness in the present inquiry.

Best,

Paul