Amar,
> Could we use something like this in the 3dLMEr model specification: -gltCode neg-neu 'emotion : (1*neg -1*none) - (1*neut -1*none)'
That inference should be specified as
-gltCode neg-neu 'emotion : 1*neg -1*none -1*neut 1*none'
which is equivalent to
-gltCode neg-neu 'emotion : 1*neg -1*neut'
Gang