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Hi, I've Cc'ed the marsbar list - the marsbar list is the best place for marsbar questions. On Sun, Jan 12, 2014 at 9:49 PM, Andy Yeung <[log in to unmask]> wrote: > Dear all, > > I'm a beginner of Marsbar. I want to plot a % signal change against time > graph for 4 contrasts in group analysis. > > I have already imported group level analysis SPM.mat into Marsbar then > choose % signal change. It says it needs fMRI design. > > Could anyone help? Yes - the event-related functions such as percent signal change need information about event-onsets and basis functions that SPM does not store in the second level designs. I'm afraid you need to go back to the first-level designs that do have this information, and use these in marsbar: http://marsbar.sourceforge.net/faq.html#how-do-i-do-a-random-effect-analysis-in-marsbar Cheers, Matthew