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Dear SPM list, I've been trying to obtain the time course of activation. First of all I'm not sure, if the length of my time bins should equal the TR (3 sec) or if it would be wiser to choose shorter bins of, lets say, 2 sec? Time bins should cover the period from 5 time points before to 5 time points after the onset of the condition so that the whole time course should cover 30sec. Since SPM 2 no longer offers the distinction beween "event related" and "epoch related" designs I'm not quite sure how to specify the design if I do not want to convolve my data with the canonical HRF. Which basis set should I choose for the model setup? FIR model? If so what about the window length (30?), order (10?) and duration (0?)? Thanks a lot in advance! Simone