Consonant Age-of-Acquisition Effects in Nonword Repetition Are Not Articulatory in Nature Purpose Most research examining long-term-memory effects on nonword repetition (NWR) has focused on lexical-level variables. Phoneme-level variables have received little attention, although there are reasons to expect significant sublexical effects in NWR. To further understand the underlying processes of NWR, this study examined effects of sublexical long-term phonological knowledge by ... Research Article
Research Article  |   November 09, 2017
Consonant Age-of-Acquisition Effects in Nonword Repetition Are Not Articulatory in Nature
 
Author Affiliations & Notes
  • Michelle W. Moore
    West Virginia University, Morgantown
    University of Pittsburgh, Pennsylvania
  • Julie A. Fiez
    University of Pittsburgh, Pennsylvania
    Learning Research and Development Center, Pittsburgh, PA
    Center for the Neural Basis of Cognition, Pittsburgh, PA
  • Connie A. Tompkins
    University of Pittsburgh, Pennsylvania
    Center for the Neural Basis of Cognition, Pittsburgh, PA
  • 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 Michelle W. Moore: mimoore@mail.wvu.edu
  • Editor: Julie Liss
    Editor: Julie Liss×
  • Associate Editor: Amy Neel
    Associate Editor: Amy Neel×
Article Information
Speech, Voice & Prosody / Language / Research Articles
Research Article   |   November 09, 2017
Consonant Age-of-Acquisition Effects in Nonword Repetition Are Not Articulatory in Nature
Journal of Speech, Language, and Hearing Research, November 2017, Vol. 60, 3198-3212. doi:10.1044/2017_JSLHR-L-16-0359
History: Received September 9, 2016 , Revised March 29, 2017 , Accepted May 8, 2017
 
Journal of Speech, Language, and Hearing Research, November 2017, Vol. 60, 3198-3212. doi:10.1044/2017_JSLHR-L-16-0359
History: Received September 9, 2016; Revised March 29, 2017; Accepted May 8, 2017

Purpose Most research examining long-term-memory effects on nonword repetition (NWR) has focused on lexical-level variables. Phoneme-level variables have received little attention, although there are reasons to expect significant sublexical effects in NWR. To further understand the underlying processes of NWR, this study examined effects of sublexical long-term phonological knowledge by testing whether performance differs when the stimuli comprise consonants acquired later versus earlier in speech development.

Method Thirty (Experiment 1) and 20 (Experiment 2) college students completed tasks that investigated whether an experimental phoneme-level variable (consonant age of acquisition) similarly affects NWR and lexical-access tasks designed to vary in articulatory, auditory-perceptual, and phonological short-term-memory demands. The lexical-access tasks were performed in silence or with concurrent articulation to explore whether consonant age-of-acquisition effects arise before or after articulatory planning.

Results NWR accuracy decreased on items comprising later- versus earlier-acquired phonemes. Similar consonant age-of-acquisition effects were observed in accuracy measures of nonword reading and lexical decision performed in silence or with concurrent articulation.

Conclusion Results indicate that NWR performance is sensitive to phoneme-level phonological knowledge in long-term memory. NWR, accordingly, should not be regarded as a diagnostic tool for pure impairment of phonological short-term memory.

Supplemental Materials https://doi.org/10.23641/asha.5435137

Acknowledgments
This project was funded by the University of Pittsburgh School of Health and Rehabilitation Sciences Research Development Fund and National Institutes of Health Grant 1R01HD060388, awarded to Julie A. Fiez.
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