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Hi, If you have a window running from 0-24s and 8 FIR EVs, each EV (or in this case "bin") covers 3 seconds, i.e. the first is 0-3, second 3-6 etc. Hope this helps, Steve On 17 Oct 2006, at 15:18, Dan Wolf wrote: > Hi, > sorry but I have the same FIR timing question, and didn't > understand the answer given. > If I model a window of 24 seconds, TR 3 seconds, 8 parameters, then > I get 8 pe images, but I am not > sure whether they start at time zero or at time t=3seconds. > In other words, the window 0-24seconds, divided into 3 second > intervals, has 9 possible time points, > not 8: 0, 3, 6, 9,12,15,18,21,24 - which 8 of these 9 is returned? > Thanks, > Dan ------------------------------------------------------------------------ --- Stephen M. Smith, Professor of Biomedical Engineering Associate Director, Oxford University FMRIB Centre FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK +44 (0) 1865 222726 (fax 222717) [log in to unmask] http://www.fmrib.ox.ac.uk/~steve ------------------------------------------------------------------------ ---