Hi,

    I have two related questions.  I have two conditions (e.g. C1 and C2) and I want to generate a map that shows all voxels that can differentiate C1 from C2 irrespective of whether C1>C2 or C1<C2.  I think it can be done easily by:

mris_calc -o sig.nii abs_sig.nii abs
    

    If I am right, then: 
1) Can I apply the same command to ces.nii file to have the absolute value of the effect size (i.e. abs(C1-C2 effect size)) or should I consider other factors?

2) Do I need to apply the same routine to cesvar?

Thanks
--
Shahin Nasr

PhD in Cognitive Neuroscience
Martinos Imaging Center, MGH
Harvard Medical School