Discriminating Down Syndrome and Fragile X Syndrome based on language ability

Lizbeth H. Finestack, Audra M. Sterling, Leonard J Abbeduto

Research output: Contribution to journalArticle

34 Scopus citations

Abstract

This study compared the receptive and expressive language profiles of verbally expressive children and adolescents with Down Syndrome (DS) and those with Fragile X syndrome (FXS) and examined the extent to which these profiles reliably differentiate the diagnostic groups. A total of twenty-four verbal participants with DS (mean age: 12 years), twenty-two verbal participants with FXS (mean age: 12 years), and twenty-seven participants with typical development (TD; mean age A = A 4 years) completed standardized measures of receptive and expressive vocabulary and grammar, as well as a conversational language sample. Study results indicate that there are distinct DS and FXS language profiles, which are characterized by differences in grammatical ability. The diagnostic groups were not differentiated based on vocabulary performance. This study supports the existence of unique language profiles associated with DS and FXS.

Original languageEnglish (US)
Pages (from-to)244-265
Number of pages22
JournalJournal of Child Language
Volume40
Issue number1
DOIs
StatePublished - Jan 2013

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ASJC Scopus subject areas

  • Linguistics and Language
  • Language and Linguistics
  • Psychology(all)
  • Developmental and Educational Psychology
  • Experimental and Cognitive Psychology

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