Fey, Marc E.Sokol, Shari Baron2009-05-082009-05-082008-01-012008http://dissertations.umi.com/ku:10070https://hdl.handle.net/1808/4544Consonant inventory and syllable complexity measures were taken at two points from 50 children with developmental delays. Twenty-six children had Down syndrome (DS). Canonical and noncanonical words and utterances, and the initial- and final-consonant inventory were coded during two 15-minute videotaped conversational samples with a parent at two points in time, 18 months apart. For all measures at Time 1 (age ~25 months), the children with DS performed equally well or better than their peers without DS. The reverse was true for all measures at Time 2 (~ 43 months). Phonological skills in young children with DS are delayed beyond the level predictable by mental age during early lexical development. A clear relationship between slow phonological growth and slow lexical growth at the period of "first word" acquisition was established for children with DS.125 pagesENThis item is protected by copyright and unless otherwise specified the copyright of this thesis/dissertation is held by the author.Health sciencesSpeech pathologyChild developmentDown syndromePhonologySpeech developmentDissertationopenAccess