Preschoolers learned a novel adjective or count noun for an object and chose between two objects that shared an object kind or a material kind property with the target object. Found that, in interpreting adjectives, four-year-olds were more likely to choose the object sharing material kind with the target if the target was familiar than if it was…

Four experiments examined three- and four-year olds' interpretations of novel words applied to familiar objects in the sentence frame "This Y is X," where X is a novel word and Y is a familiar count noun. Results indicated that preschoolers understood that the novel words were either proper names or adjectives/mass nouns. (MDM)

Three experiments examined preschoolers' and adults' understanding of distinctive semantic functions of adjectives and count nouns. Found that 4-year olds and adults, but not 3-year olds, who heard the adjective version (e.g., "a blue bird") were more likely than those who heard the count noun version ("a bluebird") to choose…