afni.nimh.nih.gov

> I want to know if I need to do the fisher-z translate for the correlation coefficient.

The transformation is usually recommended to meet the normality assumption of the Student's t-test. You can do so with the following command:

3dcalc -a Corr_subj01R+tlrc -expr 'log((1+a)/(1-a))/2' -prefix Corr_subj01_Z

Gang