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Hi Sam, thanks for sending the design. I presume that this is the second level of a 3-level analysis. As it says in the bubble-help for FLAME, if you are going to pass FLAME results up to a higher level (as you will do here) then you should be running FLAME stage 1 only at the second level, which should speed things up a lot for you. I've amended the doc so that in the next release this 3-level example reminds people about this - thanks! Let me know if this doesn't fix things - cheers, Steve. On Wed, 5 May 2004, Stephen Smith wrote: > Hi - yes, this is unusually slow. You shouldn't have any problems with > RAM, because you have >40 inputs at second level, so FLAME will be being > run slice-by-slice. Could you send in design.gif from second level so we > can have a quick look at that. > > In the meantime, you could try running FLAME (part 1 only) to check that > reasonable results are coming out. > > Cheers, Steve. > > > On Tue, 4 May 2004, Sam Harris wrote: > > > I have a question about how long a higher lever analysis can be > > reasonably expected to run. I recently set up a second level analysis > > on a dual G5 with 2.5 gigabytes of RAM, and after 36 hours it was > > still struggling to finish the the first COPE. At this rate, the > > analysis would have taken over two weeks to terminate. Is this even > > in the range of possibility for a valid design? Or is the problem > > necessarily in the brain of the user? > > > > The design came straight from the FSL documentation (Multi-Session & > > Multi-Subject [Repeated Measures -- Three Level Analysis]). We ran an > > event-related protocol on 14 subjects, 3 scans each, 170 volumes per > > scan. There were 12 contrasts done at the lower level. FLAME was run > > at both levels. > > > > Thanks in advance for your help. > > Best, > > Sam > > > > 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 > 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