Deferred imitation and early social communication skills were compared among speaking and nonspeaking children with autism and children developing typically. Overall, the children with autism showed a lower frequency on measures of deferred imitation and social communication compared with typically developing children. Deferred imitation was…

This article addresses the acquisition of meaning of words and phrases that refer to aspects of the world that are not directly perceivable. It examines the patterns of semantic input that are available in the linguistic environment that provide clues to allow a child to construct a lexicon that is both broad and deep. These patterns are…