However, slightly worse performance is obtained for LexCatDep, a model which is identical to the original LexCat model, except that c S is also conditioned on c H , the lexical category of the head node, which introduces a dependency between the lexical categories.
since there is so much information in the lexical categories, one might expect that this would reduce the effect of conditioning the expansion of a constituent on its head word w. we did find a substantial effect.