Language Skill Mediates the Relationship Between Language Load and Articulatory Variability in Children With Language and Speech Sound Disorders Purpose The aim of the study was to investigate the relationship between language load and articulatory variability in children with language and speech sound disorders, including childhood apraxia of speech. Method Forty-six children, ages 48–92 months, participated in the current study, including children with speech sound disorder, developmental ... Research Article
Research Article  |   December 10, 2018
Language Skill Mediates the Relationship Between Language Load and Articulatory Variability in Children With Language and Speech Sound Disorders
 
Author Affiliations & Notes
  • Janet Vuolo
    Department of Speech and Hearing Science, The Ohio State University, Columbus
  • Lisa Goffman
    Callier Center for Communication Disorders, Behavioral and Brain Sciences, University of Texas at Dallas
  • Disclosure: The authors have declared that no competing interests existed at the time of publication.
    Disclosure: The authors have declared that no competing interests existed at the time of publication. ×
  • Correspondence to Janet Vuolo: vuolo.4@osu.edu
  • Editor-in-Chief: Sean Redmond
    Editor-in-Chief: Sean Redmond×
  • Editor: Lisa Archibald
    Editor: Lisa Archibald×
Article Information
Development / Speech, Voice & Prosodic Disorders / Language Disorders / Attention, Memory & Executive Functions / Speech, Voice & Prosody / Language / Research Articles
Research Article   |   December 10, 2018
Language Skill Mediates the Relationship Between Language Load and Articulatory Variability in Children With Language and Speech Sound Disorders
Journal of Speech, Language, and Hearing Research, December 2018, Vol. 61, 3010-3022. doi:10.1044/2018_JSLHR-L-18-0055
History: Received February 12, 2018 , Revised June 27, 2018 , Accepted July 11, 2018
 
Journal of Speech, Language, and Hearing Research, December 2018, Vol. 61, 3010-3022. doi:10.1044/2018_JSLHR-L-18-0055
History: Received February 12, 2018; Revised June 27, 2018; Accepted July 11, 2018

Purpose The aim of the study was to investigate the relationship between language load and articulatory variability in children with language and speech sound disorders, including childhood apraxia of speech.

Method Forty-six children, ages 48–92 months, participated in the current study, including children with speech sound disorder, developmental language disorder (aka specific language impairment), childhood apraxia of speech, and typical development. Children imitated (low language load task) then retrieved (high language load task) agent + action phrases. Articulatory variability was quantified using speech kinematics. We assessed language status and speech status (typical vs. impaired) in relation to articulatory variability.

Results All children showed increased articulatory variability in the retrieval task compared with the imitation task. However, only children with language impairment showed a disproportionate increase in articulatory variability in the retrieval task relative to peers with typical language skills.

Conclusion Higher-level language processes affect lower-level speech motor control processes, and this relationship appears to be more strongly mediated by language than speech skill.

Acknowledgments
This work was supported by the National Institute on Deafness and Other Communication Disorders Grant F31 DC015176 (awarded to Vuolo) and Grant R01 DC04826 (awarded to Goffman). We thank Sara Benham, Janna Berlin, Lakin Brown, and Katie Isbell for their assistance with data collection and analyses. These data were collected at Purdue University.
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