Dear SPM users,
I have a question regarding multiple regression with vbm data (using SPM5).
For my analysis, I would like to correlate neuropsychological data with grey matter volume and correct for total intracranial volume. As far as I understand, I have to choose the “multiple regression” model and enter the neuropsychological data as covariate. How can I correct for total intracranial volume?
My guess is that I have to enter it as a covariate as well. If so, what do I have to enter in the contrast manager? 1 0 ? Would that be right?
Thank you very much for your help!
Silke Matura
Brain Imaging Center Frankfurt am Main
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