Hi Gang,
Thanks very much for your reply. I have two more questions:
question1:
I am also interested in main effect of conditions and in comparing condition 1 among the subjects in group 1 and condition 3 among subjects in group 2. Based on this, is 3dLME better?
question2:
I would like to know where I could find voxel sizes, then I can use them to set the Clustersize in the AFNI GUI (multiple comparisons correction) to see significant clusters.