Dear SPM and DCM community,
I have a fMRI longitudinal design. I would like to compare connection values of two DCM models compute on the data at T1 or data at T2. I have a question relative to the selection of the ROI (sphere of 7mm radius). Should I extract the time course exactly at the same location for T1 and T2 or should I adapt the position of the sphere regarding to the position of the local maxima inside in my anatomical mask for each session (T1, T2)?
Thank you very much in advance.
Michaƫl
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