sorry, you cannot have three levels in qdec (two max). You will need to use the "command line" stream (ie, create a FSGD file and consrast files, run mris_preproc, mri_surf2surf to smooth, mri_glmfit, and mri_glmfit-sim). See the wiki for more details.

doug

On 2/16/14 4:53 PM, Yang, Daniel wrote:

Dear FreeSurfer creators and experts,

I am trying to run qdec with one discrete with three levels (i.e., https://surfer.nmr.mgh.harvard.edu/fswiki/Fsgdf3G0V) but there is some error message:

ERROR: no contrasts specified.

Error in Analyze: command failed: mri_glmfit --y  …

I am wondering if three levels a discrete factor are currently supported in qdec in FS 5.3?

Thanks!

Daniel

-- 

Daniel (Yung-Jui) Yang, Ph.D.

Postdoctoral Researcher

Yale Child Study Center

New Haven, CT

Tel: (203) 737-5454

E-mail: yung-jui.yang@yale.edu

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