Hi,

Sorry I am very new to this field, forgive me for ignorance. I am trying to do multiple comparison correction on my data set that I ran through mri_glmfit. I am currently using mri_fdr as a means for multiple comparison correction. The problem I am having now is that after running mri_fdr, the output surface overlays are completely zero. This seems very unlikely from the clusters I had, well at least hopefully unlikely.

Below I have posted part of the code for my analysis that is calling the mri_fdr function:

mri_fdr --fdr $thresh --${sign} --i $SUBJECTS_DIR/Group_Analysis/R1_projdist0.${dist}.fwhm${fwhm}/GLM_Output/${hemi}.Output/Diff-con-scz-R1/sig.mgh nomask $SUBJECTS_DIR/Group_Analysis/R1_projdist0.${dist}.fwhm${fwhm}/GLM_Output/${hemi}.Output/Corrected/FDR-Output-${sign}-thresh${thresh}.mgh

Sorry for the mess but essentially, I am running though a couple of for loops that runs through variable values posted below:

for thresh in 0.5 0.1 0.05 0.01

for sign in neg pos

for hemi in lh rh

for fwhm in15 20

for dist in 2

I am hoping there is something wrong with the way I am calling mri_fdr, any help would be greatly appreciated.

Kind Regards,

Hossein Rejali