Nevertheless, most versions of the theory developed since Kameyama (1985Kameyama ( , 1986 and Grosz, Joshi, and Weinstein (1986) have assumed that grammatical function plays the main role in determining the order among forward-looking centers, at least for English.
grosz, Joshi, and Weinstein (1995) claim that subjects are ranked more highly than objects, which are ranked more highly than other grammatical positions: SUBJ ≺ OBJ ≺ OTHERS (see also Kameyama 1986;Hudson, Tanenhaus, and Dell 1986).