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Related Experiment Video

Updated: Sep 2, 2025

Systematic Hearing Performance Evaluation Process for Adolescents with Cochlear Implantation at Early Ages
06:04

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Published on: March 24, 2023

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Exceptional Speech Recognition Outcomes After Cochlear Implantation: Lessons From Two Case Studies.

Carolyn J Herbert1, David B Pisoni1,2, William G Kronenberger1,3

  • 1DeVault Otologic Research Laboratory, Department of Otolaryngology-Head and Neck Surgery, Indiana University School of Medicine, Indianapolis.

American Journal of Audiology
|August 9, 2022
PubMed
Summary

Two adults with cochlear implants (CI) showed excellent outcomes, excelling in multisensory speech recognition and neurocognitive tests. These findings suggest broader outcome measures are needed for cochlear implant recipients.

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Area of Science:

  • Audiology
  • Neuroscience
  • Speech-Language Pathology

Background:

  • Individual variability in cochlear implant (CI) outcomes presents a clinical challenge.
  • Case studies offer insights into information processing mechanisms influencing CI success.
  • Two adults with postlingually acquired hearing loss demonstrated exceptional early CI outcomes.

Purpose of the Study:

  • To examine the auditory, speech recognition, and neurocognitive processing of two adult CI recipients with excellent outcomes.
  • To identify potential factors contributing to exceptional speech recognition performance after cochlear implantation.

Main Methods:

  • A case study design was employed with two adult cochlear implant recipients.
  • Preoperative and postoperative speech recognition tests (including City University of New York sentences) were administered.
  • A comprehensive battery of auditory, visual, and neurocognitive processing tests was utilized.

Main Results:

  • Participants exhibited significantly improved auditory-only and auditory+visual speech recognition post-CI.
  • Speech recognition, environmental sound identification, and speech-in-noise scores exceeded average CI user performance.
  • Above-average performance was observed in visual measures of vocabulary, phonological coding, verbal working memory, and executive functioning.

Conclusions:

  • Multisensory speech recognition and visual neurocognitive functioning correlate with excellent CI outcomes.
  • These neurocognitive domains may explain exceptional performance and inform research on outcome variability.
  • Clinical outcome measures should incorporate advanced speech recognition and neurocognitive assessments beyond traditional metrics.