Hi,
From what I can tell, q should be your FDR-corrected p threshold.
df is going to be [SPM.xCon(1).eidf SPM.xX.erdf], assuming that the spmT image of interest corresponds to the first contrast.
n is 1 since you're not interested in a conjunction.
Vs is the header struct of your spmT file. So Vs = spm_vol('spmT.img')
I don't really know what SurfStatQ.m is or if you want to use a mask, but assuming that you don't, just put 0 for Vm.
- Taylor
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