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Hi FSL crew, I am running an analysis with multiple runs. In the feat manual it says : (To) combine across sessions to create COPEs for the subject means of each subject, using a fixed-effects analysis. In the stats GUI, we select Fixed effects. Then we setup the second-level analysis with 5 EVs, where each EV picks out the 3 sessions that correspond to a particular subject. I did this and obtained good results which I can see on the browser report that fsl gives you. Following this I did the between group comparison im interested in doing: Now we want the mean group effect, across subjects, achieved with a third-level ME analysis. Select Inputs are lower-level FEAT directories and select the 5 relevant directories created at second-level, named something like subject_N.gfeat/cope1.feat. My question is what are the inputs I require for this comparisons? Is it the *.gfeat/cope1/stats/cope1.nii.gz files I am interested in? Or is it the *.gfeat/cope1/stats/zstat1.nii.gz? It isnt very clear by the feat manual. Thank you very much for your help. Best wishes -- Andres