Hi Andrew thanks for your answer. Im trying to compare the brain activation of 2 groups of patients (low grief symptoms and high grief symptoms) during a emotional processing task. I ran 3dttest with the -ClistSim and -ETAC options but it seems that any voxels are surviving the corrections. I was thinking that the power to detect differences are small considering that I am not comparing the diseased with normal subjects so I wanted to check if with a least stringent threshold I could detect any differences between this groups and that is why I was trying to run 3dClustSim. Do you have any advices on another method that I can use to compare my groups?
Thank you so much and Im sorry if Im saying not sense things, Im pretty new in the fMRI field.