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Waxman, Sandra R.; Senghas, Ann – Developmental Psychology, 1992
Twelve two year olds were taught novel count nouns for related but unfamiliar objects. Children's interpretation of the relations between the nouns was mediated by the similarity of the objects, a result that suggests that, by age two, children have the conceptual and lexical abilities necessary for establishing hierarchical relations. (LB)
Descriptors: Child Language, Classification, Cognitive Development, Developmental Psychology