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How Extended High-Frequency Amplification Affects Word Learning in Children

How Extended High-Frequency Amplification Affects Word Learning in Children. Andrea Pittman, Ph.D. Arizona State University Dawna Lewis, M.S. Brenda Hoover, M.S. Pat Stelmachowicz, Ph.D. Boystown National Research Hospital. Funded by grants from NIH-NIDCD. Background.

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How Extended High-Frequency Amplification Affects Word Learning in Children

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  1. How Extended High-Frequency Amplification Affects Word Learning in Children Andrea Pittman, Ph.D. Arizona State University Dawna Lewis, M.S. Brenda Hoover, M.S. Pat Stelmachowicz, Ph.D. Boystown National Research Hospital Funded by grants from NIH-NIDCD

  2. Background • Combination of two previous studies • Bandwidth and perception • Word learning and hearing loss • Purpose • To determine the affect of bandwidth on word learning in normal-hearing and hearing-impaired children • Standard bandwidth - 4 kHz • Extended bandwidth - 9 kHz

  3. Novel-Word Construction Place Labio- dental Post Alveola Bilabial Dental Alveola Palatal Velar Glottal p b t d k g Plosive Nasal Fricative Approximate Lateral Approximate m n N f v T  s z S Z C  h Manner r j w l

  4. Novel-Word Construction p b t d k g m n N f v T  s z S Z C  h r j w l

  5. Novel-Word Construction I b r l v  N I a o i u Q j Z p z k n I i a t  s u d w m i I i o T g S h C f I u I

  6. Novel-Word Construction bayrill vojing youzzap zeekin deewim tathus thogish hoochiff

  7. Novel-Word Construction bayrill vojing youzzap zeekin deewim tathus thogish hoochiff

  8. Story Construction

  9. Story Presentation • Low-pass filtered half the words at 4-kHz and half at 9-kHz • Each word was presented 3 times • The 4-minute story was presented twice before testing • Word-learning parameters • 8 words • 6 presentations each • 8 minute period

  10. Participants • 97 Children between 5- and 14-years-old • 60 Normal Hearing (mean age: 9yrs, SD: 2yrs) • 37 Hearing Impaired (mean age: 9yrs, SD: 2yrs) • Estimated receptive vocabulary (PPVT III)

  11. Results

  12. Results

  13. Results

  14. Results Normal-Hearing Children

  15. Results Hearing-Impaired Children

  16. Conclusions • On average, performance improved slightly in the extended bandwidth condition for both groups • Both groups demonstrated more consistent word learning in the extended bandwidth condition • Consistent word learning was more apparent for the children with hearing loss

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