The Influence of Exemplar Variability on Young Children's Construal of Verb Meaning

Verbs serve as the architectural centerpiece of sentences, making verb learning pivotal for language acquisition. Verb learning requires both the formation of a verb-action mapping and the abstraction of relations between an object and its action. Two competing positions have been proposed to explain the process of verb learning: (a) seeing a highly variable range of exemplars allows children to detect and abstract the commonalities across actions--the action invariants; and (b) seeing a less variable range of exemplars enables children to focus on and extract the action invariants. Using manner--a major component of verb meaning in English--as a test case, this study addressed this debate by examining the influence of manner variability on the ability to fast-map new verbs and extend them to novel exemplars in 2-, 3-, and 4-year-old English-speaking children. Results contribute to this debate by showing that high manner variability hindered fast-mapping but facilitated extension to manner variations in the 2- and 3-year-olds. Thus, high exemplar variability may affect verb fast-mapping and extension differently. Furthermore, manner variability did not affect 4-year-olds' (or adults') fast-mapping or extension, suggesting that the influence of exemplar variability on verb learning attenuates with age. Finally, manner variability did not affect agent or object extension, revealing a component-specific effect of exemplar variability on verb extension.