Is There a Relationship Between Speech Identification in Noise and Categorical Perception in Children With Dyslexia? Purpose Children with dyslexia have been suggested to experience deficits in both categorical perception (CP) and speech identification in noise (SIN) perception. However, results regarding both abilities are inconsistent, and the relationship between them is still unclear. Therefore, this study aimed to investigate the relationship between CP and the psychometric ... Research Article
Research Article  |   August 01, 2016
Is There a Relationship Between Speech Identification in Noise and Categorical Perception in Children With Dyslexia?
 
Author Affiliations & Notes
  • Axelle Calcus
    Fonds de la Recherche Scientifique, Brussels, Belgium
    Unité de Recherche en Neuroscience Cognitive, Center for Research in Cognition and Neurosciences, Université Libre de Bruxelles, Brussels, Belgium
  • Christian Lorenzi
    UMR CNRS 8248 LSP, Institut d'Etude de la Cognition, Ecole Normale Supérieure, Paris, France
  • Gregory Collet
    Unité de Recherche en Neuroscience Cognitive, Center for Research in Cognition and Neurosciences, Université Libre de Bruxelles, Brussels, Belgium
    VIPER Research Unit, Royal Military Academy, Brussels, Belgium
  • Cécile Colin
    Unité de Recherche en Neuroscience Cognitive, Center for Research in Cognition and Neurosciences, Université Libre de Bruxelles, Brussels, Belgium
  • Régine Kolinsky
    Fonds de la Recherche Scientifique, Brussels, Belgium
    Unité de Recherche en Neuroscience Cognitive, Center for Research in Cognition and Neurosciences, Université Libre de Bruxelles, Brussels, Belgium
  • 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 Axelle Calcus: Axelle.Calcus@ulb.ac.be
  • Editor: Nancy Tye-Murray
    Editor: Nancy Tye-Murray×
  • Associate Editor: Kathleen Cienkowski
    Associate Editor: Kathleen Cienkowski×
Article Information
Development / Hearing & Speech Perception / Acoustics / Language Disorders / Reading & Writing Disorders / Hearing / Research Articles
Research Article   |   August 01, 2016
Is There a Relationship Between Speech Identification in Noise and Categorical Perception in Children With Dyslexia?
Journal of Speech, Language, and Hearing Research, August 2016, Vol. 59, 835-852. doi:10.1044/2016_JSLHR-H-15-0076
History: Received February 23, 2015 , Revised November 5, 2015 , Accepted January 14, 2016
 
Journal of Speech, Language, and Hearing Research, August 2016, Vol. 59, 835-852. doi:10.1044/2016_JSLHR-H-15-0076
History: Received February 23, 2015; Revised November 5, 2015; Accepted January 14, 2016

Purpose Children with dyslexia have been suggested to experience deficits in both categorical perception (CP) and speech identification in noise (SIN) perception. However, results regarding both abilities are inconsistent, and the relationship between them is still unclear. Therefore, this study aimed to investigate the relationship between CP and the psychometric function of SIN perception.

Method Sixteen children with dyslexia, 16 chronological-age controls, and 16 reading-level controls were evaluated in CP of a voicing continuum and in consonant identification in both stationary and fluctuating noises.

Results There was a small but significant impairment in speech identification performance of children with dyslexia in stationary noise compared with chronological age–matched controls (but not reading level–matched controls). However, their performance increased in a fluctuating background, hence suggesting normal masking and unmasking effects and preserved sensory processing of speech information. Regarding CP, location of the phoneme boundary differed in the children with dyslexia compared with both control groups. However, scrutinizing individual profiles failed to reveal consistently poor performance in SIN and CP tasks. In addition, there was no significant correlation between CP, SIN perception, and reading scores in the group with dyslexia.

Conclusions The relationship between the SIN deficit and CP, and how they potentially affect reading in children with dyslexia, remains unclear. However, these results are inconsistent with the notion that children with dyslexia suffer from a low-level temporal processing deficit and rather suggest a role of nonsensory (e.g., attentional) factors in their speech perception difficulties.

Acknowledgments
This work was supported by Fonds de la Recherche Scientifique Grant FRFC 2.4515.12. The first and last authors are research fellow and research director, respectively, at Fonds de la Recherche Scientifique. The third author is a scientific collaborator at Unité de Recherche en Neuroscience Cognitive (Université Libre de Bruxelles) and Ecole Royale Militaire (ERM). The second author was supported by ANR HEARFIN ANR-11-BSH2-0004, ANR HEART ANR-14-CE30-0019-01, ANR-11-0001-02 PSL*, and ANR-10-LABX-0087. We thank Marie Froment for her help in collecting some of the experimental data. We are very grateful to Willy Serniclaes for helpful comments on a previous version of this article.
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