Limited acquisition and generalisation of rhotics with ultrasound visual feedback in childhood apraxia

Jonathan L. Preston, Edwin Maas, Jessica Whittle, Megan C. Leece, Patricia McCabe

Research output: Contribution to journalArticle

17 Scopus citations


Ultrasound visual feedback of the tongue is one treatment option for individuals with persisting speech sound errors. This study evaluated childrens performance during acquisition and generalisation of American English rhotics using ultrasound feedback. Three children aged 10-13 with persisting speech sound errors associated with childhood apraxia of speech (CAS) were treated for 14 one-hour sessions. Two of the participants increased the accuracy of their rhotic production during practise trials within treatment sessions, but none demonstrated generalisation to untreated words. Lack of generalisation may be due to a failure to acquire the target with sufficient accuracy during treatment, or to co-existing linguistic weaknesses that are not addressed in a motor-based treatment. Results suggest a need to refine the intervention procedures for CAS and/or a need to identify appropriate candidates for intervention to optimise learning.

Original languageEnglish (US)
Pages (from-to)363-381
Number of pages19
JournalClinical Linguistics and Phonetics
Issue number3-5
StatePublished - May 3 2016



  • Childhood apraxia of speech
  • feedback
  • rhotics
  • ultrasound

ASJC Scopus subject areas

  • Language and Linguistics
  • Linguistics and Language
  • Speech and Hearing

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