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Hi, I've not tested this, but the following should work. First you run featregapply on all first-level .feat directories. Then run higher-level analyses to combine across the 2 sessions for group 2 - you may need to use the FE option, though the ME OLS option may work. Then I would have thought that the combination across subjects should work ok? Cheers. On Fri, 7 Jan 2005, Wang, Bo wrote: > dear FSL users, > > i have two groups to compare. but in one group i have only one run > of every subject, and in another i have two runs of every subject. i found > for two-run-group, after second level analysis(cross runs, flame stage1 > only), i got cope files in xx.gfeat/cope1.feat/stats/ with normalized voxel > size(2*2*2, coregistration were applied) ; but in single-run-group, i only > can do first level analysis and got cope files in xx.feat/stats/ with origin > voxel size(3*3*5, coregistration were not applied?). then i could not deal > with the two group with different cope files in third level analysis(flame, > to see group compared results). > > i tried use featregapply command to the feat directories of every > subject in single-run-group, but then FEAT told me they were not > coregistered. > > thanks! > > > > Wang, Bo > > ------------------------------------------------ > Key Laboratory of Cognitive Science > Graduate School and Institute of Biophysics Chinese Academy of Sciences > > Addr.: Key Laboratory of Cognitive Science > Institute of Biophysics, > Chinese Academy of Sciences > 15 Datun Road, Chaoyang District > Beijing, 100101, PR China > > Tel : +8610-64888462-807 > +8610-64888463-807 > Fax : +8610-64838468 > > Email: [log in to unmask] > -- Stephen M. Smith DPhil Associate Director, FMRIB and Analysis Research Coordinator Oxford University Centre for Functional MRI of the Brain John Radcliffe Hospital, Headington, Oxford OX3 9DU, UK +44 (0) 1865 222726 (fax 222717) [log in to unmask] http://www.fmrib.ox.ac.uk/~steve