Dear SPM experts,
I am going to run a GLM with parametric regressors on fMRI data, in
which the regressor X (n=41) has four parametric conditions, Condition A
(n =16), B (n=16), C (n=6) and D (n=3) that are to be mean-centered.
Could anyone please help me understand how to mean-centre them?
Many thanks in advance!
Regards
Rosari
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