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Dear SPM community, Three questions: 1. Is it possible to use the t-maps acquired from individual analysis in a group-analysis? That way, the group-analysis may be speeded up a bit. 2. We have performed an event-related experiment with a stimulus interval of 3 secs. What basis set should we use to estimate the hrf? 3. Should we select the option 'Interactions among trials (Volterra)? Thanks in advance Matthijs Matthijs Vink Functional Imaging Dept. Psychiatry University Medical Center Room A.01.126 Heidelberglaan 100 3584 CX Utrecht The Netherlands tel. (31) 30 250 7121 (work) tel. (31) 30 250 8352 (work) tel. (31) 30 231 0171 (home) www.fMRI.nl