afni.nimh.nih.gov

Hi,

When I use 3dMannWhitney and 3dttest++ to work on the group comparison of the same datasets, I find that the polarity of mean difference from 3dMannWhitney is opposite to that from 3dttest++. In 3dttest++, I used default setA-setB. Would like to confirm with you if the 3dMannWhitney uses dset2-dset1 instead of dset1-dset2.

Thanks,
Phoebe.