This study of language development was intended to chart the developmental course of the spontaneous use of negatives and affirmatives by 1 1/2 - 3-year-olds in response to true or false statements concerning familiar objects, properties, and actions. Forty children, 18, 24, 30, and 36 months of age, were assessed for knowledge of the words used…

That semantics interacts with syntax has been shown in psycholinguistic investigations of the processing of language by adults and of the acquisition of language by children. The few programs for language assessment and therapy that have attempted to incorporate semantic considerations have included some misunderstandings of the psycholinguistic…