Reply-To: | | [log in to unmask][log in to unmask]> wrote: > Hi Jonathan, > Many thanks for the help. > Enclosed is the design matrix. > > Best, > > On Wed, May 5, 2010 at 8:43 PM, Jonathan Peelle <[log in to unmask]> wrote: >> >> Hi Yune >> >> > I'm having trouble creating con images and I suspect this may have >> > something to do with the identical design matrix across runs. >> > So, in my study, I have four runs of visual conditions followed by four >> > runs of auditory conditions. (They were collected on separate days, but >> > were combined for multi-modal analysis) The order of contrast values >> > are >> > exactly identical across runs (e.g., 1, 1, 0, 0 (run1), 1,1,0,0 (run2) >> > ..-1-1,0,0 (run7), -1,-1, 0,0 (run8). >> > Is there any way to resolve this 'invalid contrast' issue? >> >> From what you describe I can't see any problem with your design matrix >> (unless I'm missing something)—it's common to have the same design >> across different sessions. >> >> Can you send a picture of your design matrix? Any chance the problem >> is something like not specifying the correct number of values (one per >> column)? >> >> Jonathan > >[log in to unmask] |