Preschoolers' use of form class cues in word learning.

Three experiments were conducted, involving a total of 180 2 1/2-5-year-old children. The experiments assessed the claim that preschoolers override form class cues in the interest of honoring word-meaning assumptions when they acquire new labels. Children were asked to choose an unlabeled- or a labeled-category object as the referent of a novel word modeled syntactically as a count noun or an adjective (Experiment 1) or as a count noun, adjective, or proper name (Experiments 2 and 3). Participants' interpretations of the word were also assessed (Experiment 3). Unlike many previous results, results of the present study demonstrate that children respect the form class cues when these cues and word-meaning assumptions suggest conflicting interpretations. It is proposed that past findings underestimate the robustness of form class cues as sources of information for preschoolers about the meanings of new words.