A series of experiments revealed that noun-category bias in children's word learning is present as early as two years of age. Findings indicate that, when children interpret the meaning of novel nouns, they do not sample randomly from the range of possible meanings but focus instead on category relations. (RH)

Three experiments tested 3-year-olds' subordinate classification. The first experiment found that novel noun presentation hindered classification. The second and third experiments found that provision of information for the purpose of distinguishing relevant subclasses, and introduction of novel nouns in conjunction with familiar basic level…