Dear All,
I am a bit confused about the fact that you can entered each kind of variables (i.e. age, gender, and education and so on) as covariates in SPM but you don't need to define which kind of variables it is (i.e. level of measurement). How SPM detects the type of data (i.e. nominal, ordinal, and interval)?
Especially, If I use "gender" as covariate, how SPM takes into account this "nominal type" of data.
It would be very nice if anybody knows how it works in SPM.
Best,
RebZ
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