“…Some studies have addressed the issue of whether children's comprehension of sentences like (2a) and (2b) is guided by a unique principle. However, on one hand, conflicting results were obtained, probably because of the experimental material employed (see Carden (1986), Hsu, Cairns, Eisenberg, and Schlisselberg (1989), Ingram and Snow (1981), Lust, Loveland, and Kornet (1980)). On the other hand, it was observed that, beyond Principle C, other factors appear to influence children's performance.…”