Reports three studies which explored relationships between prototypicality and sentence structure in recall, preference ratings, and natural dictionary definitions. The results can be explained in terms of the sensitivity of sentence production processes to the lexical or conceptual accessibility of prototypes. (Author/AMH)

Preschoolers' ability to understand grammatical relations in passives and to generalize was studied using animate referents. Three- to five-year-old children were taught to produce passive sentence descriptions of events in which animacy of the actor and acted-on object were varied. After pretesting to determine passive sentence comprehension, the…