Proceedings of the Annual Meeting of the Cognitive Science Society

Understanding a gradable adjective (e.g., big) requires mak-ing reference to a comparison class, a set of objects or entitiesagainst which the referent is implicitly compared (e.g., big fora Great Dane), but how do listeners decide upon a compari-son class? Simple models of semantic composition stipulatethat the adjective combines with a noun, which necessarily be-comes the comparison class (e.g., “That Great Dane is big”means big for a Great Dane). We investigate an alternativehypothesis built on the idea that the utility of a noun in anadjectival utterance can be either for reference (getting the lis-tener to attend to the right object) or predication (describing aproperty of the referent). Therefore, we hypothesize that whenthe presence of a noun N can be explained away by its util-ity in reference (e.g., being in the subject position: “That N isbig”), it is less likely to set the comparison class. Across threepre-registered experiments, we find evidence that listeners usethe noun as a cue to infer comparison classes consistent with atrade-off between reference and predication. This work high-lights the complexity of the relation between the form of anutterance and its meaning.