Sentences containing plural numerical expressions (e.g., "two boys") can give rise to two interpretations (collective and distributive), arising from the fact that their representation admits of a part-whole structure. We present the results of a series of experiments designed to explore children's understanding of this distinction…

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 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…