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HI - I think what you want to do is to use the input option "select COPE files" rather than FEAT directories, so that for each first-level COPE type that you want to run the second level on, you can choose to input only those subjects that have valid COPE files present after the first-level analyses. Hope this gives you what you want. Cheers. On 15 May 2009, at 19:27, Heather L. Urry wrote: > That's a great idea-- thanks, Tom! > > Just wondering, then: Is the issue that higher level analyses > incorporate only those voxels for which there are nonzero values > across all EVs across all first-level analyses? > > Cheers, > > Heather > > On Fri, May 15, 2009 at 5:06 AM, Tom Johnstone > <[log in to unmask]> wrote: >> Hi Heather, >> >> On Fri, May 15, 2009 at 3:40 AM, Heather L. Urry <[log in to unmask] >> > wrote: >>> This warning is produced repeatedly. I'd thought of perhaps just >>> leaving the behavioral covariate EVs out when running the second >>> level >>> analyses but I'd actually like to see the effect of the button press >>> across subjects at the highest level. Does anyone have a suggestion >>> for how to handle this problem? I'm running FSL 4.1.0 on Mandriva >>> linux. >> >> I don't know if it's the easiest solution, but one way would be to do >> two 2nd level analyses - one leaving out the behavioural copes, and >> one only on the behavioural copes. For the latter, rather than >> choosing the feat directory as input, choose individual cope files. >> You can then select only the behavioural cope files for which you >> have >> data (i.e. miss out the "empty" ones). >> >> This will do what you want to do, but will be a little more finicky >> with specifying the the data. >> >> >> -Tom >> >> >> >>> Thanks! >>> >>> Best, >>> >>> Heather >>> >>> >>> -- >>> Heather L. Urry >>> Department of Psychology >>> Tufts University >>> 490 Boston Avenue >>> Medford, MA 02155 >>> >>> email: [log in to unmask] >>> phone: 617-627-3733 >>> fax: 617-627-3181 >>> >> > > > > -- > Heather L. Urry > Department of Psychology > Tufts University > 490 Boston Avenue > Medford, MA 02155 > > email: [log in to unmask] > phone: 617-627-3733 > fax: 617-627-3181 > --------------------------------------------------------------------------- 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 ---------------------------------------------------------------------------