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Speech perception in children after cochlear implantation

G M O'Donoghue1, T P Nikolopoulos, S M Archbold

  • 1Nottingham Paediatric Cochlear Implant Programme, Department of Otolaryngology, University Hospital, Queen's Medical Centre NHS Trust, United Kingdom.

The American Journal of Otology
|November 27, 1998
PubMed
Summary

Children with congenital or prelingual deafness show significant speech perception gains after cochlear implantation before age 7. Closed-set abilities develop within 3 years, while open-set skills improve over 5 years without reaching a plateau.

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Area of Science:

  • Audiology
  • Pediatric Otolaryngology
  • Speech-Language Pathology

Background:

  • Congenital and prelingual deafness significantly impact speech perception development.
  • Cochlear implantation is a key intervention for restoring auditory function in deaf children.
  • Early implantation is crucial for maximizing speech perception outcomes.

Purpose of the Study:

  • To evaluate the speech perception abilities of congenitally and prelingually deaf children post-cochlear implantation.
  • To track the development of closed-set and open-set speech perception over time.

Main Methods:

  • A prospective study of 119 children (ages 2-7 at implantation) receiving multichannel cochlear implants.
  • Utilized the Iowa Matrix Closed Set Sentence Test and Connected Discourse Tracking.

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  • Assessed speech perception without lip-reading at 12, 24, 36, 48, and 60 months post-implantation.

    • Main Results:

    • Closed-set speech discrimination reached a plateau of 99% by 36 months.
    • Open-set speech perception (Connected Discourse Tracking) showed median scores of 0, 0, 21, 40, and 53 words per minute at 12, 24, 36, 48, and 60 months, respectively.
    • Significant improvements in open-set perception were observed up to 5 years post-implantation.

    Conclusions:

    • Children implanted before age 7 develop significant closed-set speech perception within 3 years.
    • Open-set speech perception without lip-reading is limited initially but improves substantially over 5 years.
    • Cochlear implantation facilitates substantial speech perception development in young deaf children.