Dear SPMers,
we are not sure if the file containing global mean intensity values to
enter as a covariate in the AnCova model is the "spm.ps". Can anybody help
us with this?
Can you tell us which file contains the information about global mean
concentration (from smoothed unmodulated grey matter images) and global
mean volume values (from smoothed modulated grey matter images)?
We want to control for intensity and concentration/volume and don't
understand the best way to enter these covariates in the model.
Any suggestion will be very appreciated!
Maria Vittoria Spampinato, MD
Caitlin Fausey
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