No it should not. You should check your data and design to make sure that it makes sense doug
On 04/01/2014 05:46 PM, Govindarajan, Koushik Athreya wrote:
I proceeded to do a Monte Carlo simulation with this glm and pretty much the entire brain lit up. That is why I was wondering if the max vox being so large or the search space has anything to do with it. I used a vertex-wise p-value of 0.001 and a cluster-wise p-value of 0.05.
Thanks Koushik
-----Original Message----- From: freesurfer-bounces@nmr.mgh.harvard.edu [mailto:freesurfer-bounces@nmr.mgh.harvard.edu] On Behalf Of Douglas N Greve Sent: Tuesday, April 01, 2014 4:41 PM To: freesurfer@nmr.mgh.harvard.edu Subject: Re: [Freesurfer] mri_glmfit question
what does the max vox have to do with the search space? I'm not sure what the problem is here. dough
On 04/01/2014 05:05 PM, Govindarajan, Koushik Athreya wrote:
Dear all,
I am trying to run a group analysis between 2 groups of subjects. I did the mris_preproc and mri_surf2surf steps. When I set up my mri_glmfit, the end of the output is:
Reshaping mriglm->mask...
search space = 74485.691578
DOF = 1344
Starting fit and test
Fit completed in 0.481417 minutes
Computing spatial AR1 on surface
Residual: ar1mn=0.996928, ar1std=0.000586, gstd=7.275170, fwhm=17.131715
Writing results
wholegrp_contrast
maxvox sig=1e+10 F=33202.6 at index 0 0 0 seed=1396057719
mri_glmfit done
Now, from past experience, I know that the search space I get here is large. Why does my maxvox sig say infinite? Am I missing something? Has this happened to others?
Thanks
Koushik
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