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Hi - see the following link for nice explanations of these things: http://imaging.mrc-cbu.cam.ac.uk/imaging/PrinciplesRandomFields Cheers. On 29 May 2009, at 15:02, Anna-Maria D'Cruz wrote: > Hi FSL users, > > I am trying to find out the minimum size of a cluster admitted to my > activation map given my post-stats thresholding of z=2.3 and p=.05. > I've > gone over a bunch of the papers suggested in the archives here but > can't > figure out actually how to calculate this for my data. > > How, if at all, is the p-threshold related to my RESEL count? > > Thanks for your help. > > Anna-Maria > > Anna-Maria D'Cruz > University of Illinois at Chicago > Center for Cognitive Medicine > Department of Psychiatry > 912 South Wood St., Suite 235 (M/C 913) > Chicago, IL 60612 > Phone: (312) 355-5651 > http://ccm.psych.uic.edu > --------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------