Dear SPMers, I have calculated the volume of activation of different brain areas using a fixed effects analysis (fMRI data set, SPM99b). How can I obtain an estimate of the error of these volumes? Thanks in advance, Jorge ------------------------------------------------------------------- Jorge Jovicich, Dr. rer. nat. Dept. of Neurology | Computation and Neural Systems Harbor-UCLA Medical Center | California Institute of Technology 1124 W Carson St. B-4 | 1200 E California Blv., BI 139-74 Torrance, CA 90502, USA | Pasadena, CA 91125, USA 310-222-5656/7 | 626-395-2882 310-222-5658 (fax) | 626-796-8876 (fax) [log in to unmask] | [log in to unmask] %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%