I am looking at the relationship between the cortical thickness and a behaviour measure, while controlling for the effects of age and gender. In this analysis, I am using CT_AT.fsgd, contrast_pos.txt and a contrast_neg.txt.

GroupDescriptorFile 1
Title Autistictraits
Class AT
Variables                         Age     Gender   AT

Input   Con_P001   AT   -4.142    -0.428    21
Input   Con_P002   AT   -8.142    -0.428    31

My separate two contrast files:

Contrast_pos.txt      0          0           0         1

                            

Contrast_neg.txt      0          0           0         -1

mri_glmfit --y lh.thickness.AT.10B.mgh --fsgd CT91_4.fsgd doss --C Contrast91_pos.txt --surf fsaverage lh --cortex --glmdir glmdirlhposlat.glmdir

mri_glmfit --y lh.thickness.AT.10B.mgh --fsgd CT91_4.fsgd doss --C Contrast91_neg.txt --surf fsaverage lh --cortex --glmdir glmdirlhneglat.glmdir

mri_glmfit-sim --glmdir glmdirlhposlat.glmdir --cache 1.3 pos --cwp 0.05

mri_glmfit-sim --glmdir glmdirlhneglat.glmdir --cache 1.3 neg --cwp 0.05

By changing the commands appropriately, I am looking at the right hemisphere too.

Can anyone please help me to clarify, if I am applying the command lines correctly? Any sort of help would be very much appreciated. Thanks !

best,