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Disproportionate language impairment in children using cochlear implants.

Kelvin Hawker1, Jayne Ramirez-Inscoe, Dorothy V M Bishop

  • 1Nottingham Cochlear Implant Programme, Ropewalk House, Nottingham, NG1 6HA.

Ear and Hearing
|May 6, 2008
PubMed
Summary
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Children with cochlear implants (CI) may have severe language impairments beyond deafness. These difficulties could stem from an inherited basis, similar to specific language impairment.

Area of Science:

  • Pediatric audiology
  • Developmental linguistics
  • Clinical audiology

Background:

  • Some children with cochlear implants (CI) exhibit severe language impairments that are not fully explained by their hearing loss.
  • These "disproportionate" language problems (DLI) require further investigation to understand their underlying causes.

Purpose of the Study:

  • To investigate the nature of unexplained, severe language impairments in children using cochlear implants.
  • To determine if these language difficulties are related to specific language impairment (SLI) found in normally hearing children.

Main Methods:

  • A study matched six prelingually deaf children with DLI to control children based on etiology, age at implantation, and CI experience.
  • All children underwent a comprehensive language test battery typically used to diagnose SLI in normally hearing children.

Related Experiment Videos

Main Results:

  • Despite comparable performance IQ scores, significant differences in language abilities were observed between the DLI group and the control group.
  • The DLI group consistently performed worse on all five language tests administered.

Conclusions:

  • Language impairments in some children with CIs appear to be distinct from and additional to challenges posed by deafness.
  • These language difficulties may share a common, predominantly inherited etiology with specific language impairment.