afni.nimh.nih.gov

> I have centered the "Change" and "Rating" covariates of interest for each level of Valence separately.

In that case I suggest that you specify a 0 center for those two quantitative covariates with -qVarCenters.

> So I should be using gltCode 3 and 4 as seen below?

They look fine to me.

Also, you need to specify the random effects, for example:

-ranEff '~1' \

Gang