Hi!
I am trying to run a multiple regression with grey matter (scans) and 5 covariates. I was wondering if anyone had any information about the meaning behind the beta images. I had assumed that the grey matter was the dependent/response variable in the regression model, but I am confused because I get 6 beta images (meaning that grey matter has a beta, which I would not expect unless it was part of the regression model). Any help would be greatly appreciated.
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