Re: [Freesurfer] Contrast matrix

2012-09-07 Thread Douglas N Greve
Use the significant clusters as ROIs doug On 09/07/2012 10:43 AM, Meng Li wrote: > Hi professor, > Thanks for your letter. > When I perform the analysis of interaction by using the matrix: > 0.25 0.25 -0.25 -0.25 -0.25 -0.25 0.25 0.25 0 0 0 0 0 0 0 0 0 0 0 0 0 > 0 0 0 > I get the significant clus

Re: [Freesurfer] Contrast matrix

2012-09-07 Thread Douglas N Greve
That is the correct matrix to use. You can create a new FSGD file (and the second matrix would be correct for it), but you do not have to. It will save you a few degrees of freedom. doug On 09/07/2012 05:49 AM, Meng Li wrote: > Hi professor, > Thanks for your reply. > When I perform the main

Re: [Freesurfer] Contrast matrix

2012-09-07 Thread Meng Li
Hi professor, Thanks for your reply. When I perform the main effect of dignosis, is the following matrix I used correct? 0.25 0.25 0.25 0.25 -0.25 -0.25 -0.25 -0.25 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 (I think it regressed out the effect of genotype and gender, that is it takes the genotype as a