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Reduced Theta Sampling in Infants at Risk for Dyslexia across the Sensitive Period of Native Phoneme Learning

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  • Maria Mittag

    (Institute for Learning & Brain Sciences, University of Washington, Seattle, WA 98195-7988, USA)

  • Eric Larson

    (Institute for Learning & Brain Sciences, University of Washington, Seattle, WA 98195-7988, USA)

  • Samu Taulu

    (Institute for Learning & Brain Sciences, University of Washington, Seattle, WA 98195-7988, USA
    Department of Physics, University of Washington, Seattle, WA 98195-7988, USA)

  • Maggie Clarke

    (Institute for Learning & Brain Sciences, University of Washington, Seattle, WA 98195-7988, USA)

  • Patricia K. Kuhl

    (Institute for Learning & Brain Sciences, University of Washington, Seattle, WA 98195-7988, USA)

Abstract

Research on children and adults with developmental dyslexia—a specific difficulty in learning to read and spell—suggests that phonological deficits in dyslexia are linked to basic auditory deficits in temporal sampling. However, it remains undetermined whether such deficits are already present in infancy, especially during the sensitive period when the auditory system specializes in native phoneme perception. Because dyslexia is strongly hereditary, it is possible to examine infants for early predictors of the condition before detectable symptoms emerge. This study examines low-level auditory temporal sampling in infants at risk for dyslexia across the sensitive period of native phoneme learning. Using magnetoencephalography (MEG), we found deficient auditory sampling at theta in at-risk infants at both 6 and 12 months, indicating atypical auditory sampling at the syllabic rate in those infants across the sensitive period for native-language phoneme learning. This interpretation is supported by our additional finding that auditory sampling at theta predicted later vocabulary comprehension, nonlinguistic communication and the ability to combine words. Our results indicate a possible early marker of risk for dyslexia.

Suggested Citation

  • Maria Mittag & Eric Larson & Samu Taulu & Maggie Clarke & Patricia K. Kuhl, 2022. "Reduced Theta Sampling in Infants at Risk for Dyslexia across the Sensitive Period of Native Phoneme Learning," IJERPH, MDPI, vol. 19(3), pages 1-16, January.
  • Handle: RePEc:gam:jijerp:v:19:y:2022:i:3:p:1180-:d:730045
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    References listed on IDEAS

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    1. Victoria Leong & Usha Goswami, 2015. "Acoustic-Emergent Phonology in the Amplitude Envelope of Child-Directed Speech," PLOS ONE, Public Library of Science, vol. 10(12), pages 1-37, December.
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