Though preschoolers in certain experimental contexts strongly prefer to interpret ambiguous sentences containing quantified NPs and negation on the basis of surface syntax (e.g., Musolino's 1998 "observation of isomorphism"), contextual manipulations can lead to more adult-like behavior. But is isomorphism a "purely" pragmatic phenomenon, as…

We show that 4-year-olds assign the correct interpretation to antecedent-contained deletion (ACD) sentences because they have the correct representation of these structures. This representation involves Quantifier Raising (QR) of a Quantificational Noun Phrase (QNP) that must move out of the site of the verb phrase in which it is contained to…

We demonstrate a U-shaped developmental trajectory in the interpretation of scopally ambiguous sentences, with 4-year-olds and adults, but not 5-year-olds, accessing inverse scope. These results argue against any view that treats 5-year-olds failures as resulting from immaturity of a single mechanism. Instead, we propose that this developmental…