Recent research has established that contrast can exert a powerful effect on early word learning. This study examined the role of contrast in young children's ability to learn proper names. Preschoolers heard a novel word for an unfamiliar stuffed animal in the presence of a second stuffed animal of either the same or a different kind.…

Word learning is a lifelong activity constrained by cognitive biases that people possess at particular points in development. Age of acquisition (AoA) is a psycholinguistic variable that may prove useful toward gauging the relative weighting of different phonological, semantic, and morphological factors at different phases of language acquisition…

In two experiments, one hundred ninety-two 3-year-olds, 4-year-olds, and adults heard a novel word for a target object and then were asked to extend the label to one of two test objects, one matching in shape-based object category (the shape match) and the other matching in a property other than shape (the property match). We independently…