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Related Experiment Videos

Auditory backward masking in normal hearing children.

Daphne Ari-Even Roth1, Liat Kishon-Rabin, Minka Hildesheimer

  • 1Department of Communication Disorders, The Chaim Sheba Medical Center, Tel Hashomer, Israel 52621. rothd@post.tau.ac.il

Journal of Basic and Clinical Physiology and Pharmacology
|January 18, 2006
PubMed
Summary

Backward masking (BM) performance improves with age in children. Eleven-year-olds achieve adult-like auditory processing, while younger children show deficits, indicating developmental maturation of the auditory system.

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Area of Science:

  • Auditory Neuroscience
  • Developmental Psychology
  • Speech and Hearing Sciences

Background:

  • Backward masking (BM) is an auditory phenomenon where a following masker elevates signal detection thresholds.
  • Central auditory temporal processing models, like the 'temporal window' model, suggest age-related improvements in BM thresholds.
  • Limited empirical data exists on the developmental trajectory of BM in children.

Purpose of the Study:

  • To investigate the effect of age on backward masking performance in typically developing children.
  • To determine the age at which children attain adult-like backward masking capabilities.
  • To contribute to understanding auditory system maturation and its clinical implications.

Main Methods:

  • Study included 30 typically developing children aged 7, 9, and 11 years.

Related Experiment Videos

  • Stimuli comprised a 1000 Hz pure tone and a bandpass masker (600-1400 Hz).
  • Backward masking thresholds were estimated using a three-alternative forced-choice adaptive procedure.

    • Main Results:

    • A trend for improved backward masking thresholds was observed with increasing age.
    • Seven and 9-year-old children demonstrated significantly poorer performance compared to adults.
    • Eleven-year-old children exhibited adult-like backward masking performance.

    Conclusions:

    • Backward masking performance shows significant improvement during childhood, reaching adult levels by age 11.
    • Findings align with known physiological maturation timelines of the central auditory system.
    • Results have clinical relevance for assessing temporal processing deficits in children.