Dear all,
I use PEB for rest fMRI in spm12 , I have some questions about the design matrix in PEB;
I have a group of subjects, that DCM parameters computed for each subject, in the second level I used PEB, how can I remove the effect of a covariate (or more) such as handedness on group mean connectivity over subjects?
If I define a design matrix like this and the design matrix not be mean-centered, is it correct?
PEB parameters regard the first column of the design matrix can show group mean connectivity over subjects that remove the effect of handedness?
X=[ones(18,1)';0 1 0 1 1 1 0 1 1 0 1 1 0 1 0 1 1 1]';
Regards,
Soroor
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