Spatial & temporal variability of sibilants in children with down’s syndrome

Claire Timmins, Sara Wood

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This paper presents findings from EPG analysis of word initial /s/ and /ʃ/ in twenty five children with Down’s syndrome (DS) and ten cognitively age-matched typically developing children (TD). Spatial and temporal variability measures show evidence of increased variability in all attempts of target /s/ and /ʃ/ for the speakers with DS. The findings also show evidence of high levels of spatial variability in children with DS and typically developing children in perceptually acceptable productions of the target sounds. These findings support previous research that links speech production difficulties in children with DS to impaired speech motor ability.
Original languageEnglish
Title of host publicationProceedings of the 18th International Congress of Phonetic Sciences - ICPhS 2015
Place of PublicationGlasgow, Scotland
Number of pages4
Publication statusPublished - 14 Aug 2015
Event18th International Congress of Phonetic Sciences - Glasgow, United Kingdom
Duration: 10 Aug 201514 Aug 2015


Conference18th International Congress of Phonetic Sciences
Country/TerritoryUnited Kingdom
Internet address


  • Down’s syndrome
  • sibilant fricatives
  • EPG
  • variability

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