Two experiments measured the frequency of perceptual errors as a function of differential presupposition in descriptive sentences. More errors occurred when misrepresentation involved presupposition than when it involved the focused proposition. Several surface structures of English, in combination, increased the presuppositional strength of the…

This dissertation seeks to provide an improved syntactic analysis of the phenomena known as "island constraints" and to offer a natural explanation for these and other phenomena in behavioral terms. The author approaches the problem using the notions of "nucleus" and "satellite," and shows that these concepts are a necessary part of a…