Speech discrimination skills in deaf infants before and after cochlear implantation

David L. Horn, Derek M. Houston, Richard Miyamoto

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

The benefit of early cochlear implantation (CI) to later speech perception outcomes in prelingually deaf (PLD) children is well established and implantation of infants has become more prevalent. The aim of this study was to determine whether or not deaf infants could discriminate audiovisual non-words shortly after CI and whether their attention to speech and non-speech audiovisual stimuli was similar to infants with normal hearing (NH). Three groups of participants were tested: PLD infants tested prior to CI (pre-CI), PLD infants tested post-implantation (post-CI), and a group of age-matched NH infants. A novel version of the visual habituation (VH) procedure was used. Infants were presented repetitions of an audiovisual non-word until their looking-time decreased to a predetermined criterion. They were then presented two types of test trials: repetitions of the old word (non-alternating (NA) trials) and repetitions of a novel non-word alternating with the old word (alternating (A) trials). Longer looking times to the A relative to the NA trials was taken as evidence of discriminating the non-words. An audiovisual non-speech trial was presented at the beginning and the end of each experiment and looking times between speech and non-speech trials were compared. Analyses revealed that pre- and post-CI infants had significantly shorter looking times than NH infants for speech but not non-speech trials. Furthermore, deaf infants often did not look long enough to be exposed to the novel non-word during the A trials. When trials with less than three seconds of looking were removed, analyses revealed that both NH infants and post-CI infants discriminated the non-words but pre-CI infants did not. Pre-implant hearing, age at implantation, and length of CI use were not related to visual preference for A trials. These results suggest that PLD infants show less visual interest in speech stimuli than NH infants. Despite this, PLD infants appear to be able to discriminate audiovisual non-words within three months after implantation.

Original languageEnglish
Pages (from-to)232-241
Number of pages10
JournalAudiological Medicine
Volume5
Issue number4
DOIs
StatePublished - 2007

Fingerprint

Cochlear Implantation
Speech Perception
Hearing

Keywords

  • Cochlear implant
  • Infant speech perception
  • Outcomes
  • Visual habituation

ASJC Scopus subject areas

  • Speech and Hearing
  • Otorhinolaryngology

Cite this

Speech discrimination skills in deaf infants before and after cochlear implantation. / Horn, David L.; Houston, Derek M.; Miyamoto, Richard.

In: Audiological Medicine, Vol. 5, No. 4, 2007, p. 232-241.

Research output: Contribution to journalArticle

@article{461e91f391254f31af224c81ea9d493e,
title = "Speech discrimination skills in deaf infants before and after cochlear implantation",
abstract = "The benefit of early cochlear implantation (CI) to later speech perception outcomes in prelingually deaf (PLD) children is well established and implantation of infants has become more prevalent. The aim of this study was to determine whether or not deaf infants could discriminate audiovisual non-words shortly after CI and whether their attention to speech and non-speech audiovisual stimuli was similar to infants with normal hearing (NH). Three groups of participants were tested: PLD infants tested prior to CI (pre-CI), PLD infants tested post-implantation (post-CI), and a group of age-matched NH infants. A novel version of the visual habituation (VH) procedure was used. Infants were presented repetitions of an audiovisual non-word until their looking-time decreased to a predetermined criterion. They were then presented two types of test trials: repetitions of the old word (non-alternating (NA) trials) and repetitions of a novel non-word alternating with the old word (alternating (A) trials). Longer looking times to the A relative to the NA trials was taken as evidence of discriminating the non-words. An audiovisual non-speech trial was presented at the beginning and the end of each experiment and looking times between speech and non-speech trials were compared. Analyses revealed that pre- and post-CI infants had significantly shorter looking times than NH infants for speech but not non-speech trials. Furthermore, deaf infants often did not look long enough to be exposed to the novel non-word during the A trials. When trials with less than three seconds of looking were removed, analyses revealed that both NH infants and post-CI infants discriminated the non-words but pre-CI infants did not. Pre-implant hearing, age at implantation, and length of CI use were not related to visual preference for A trials. These results suggest that PLD infants show less visual interest in speech stimuli than NH infants. Despite this, PLD infants appear to be able to discriminate audiovisual non-words within three months after implantation.",
keywords = "Cochlear implant, Infant speech perception, Outcomes, Visual habituation",
author = "Horn, {David L.} and Houston, {Derek M.} and Richard Miyamoto",
year = "2007",
doi = "10.1080/16513860701659438",
language = "English",
volume = "5",
pages = "232--241",
journal = "Audiological Medicine",
issn = "1651-386X",
publisher = "Informa Healthcare",
number = "4",

}

TY - JOUR

T1 - Speech discrimination skills in deaf infants before and after cochlear implantation

AU - Horn, David L.

AU - Houston, Derek M.

AU - Miyamoto, Richard

PY - 2007

Y1 - 2007

N2 - The benefit of early cochlear implantation (CI) to later speech perception outcomes in prelingually deaf (PLD) children is well established and implantation of infants has become more prevalent. The aim of this study was to determine whether or not deaf infants could discriminate audiovisual non-words shortly after CI and whether their attention to speech and non-speech audiovisual stimuli was similar to infants with normal hearing (NH). Three groups of participants were tested: PLD infants tested prior to CI (pre-CI), PLD infants tested post-implantation (post-CI), and a group of age-matched NH infants. A novel version of the visual habituation (VH) procedure was used. Infants were presented repetitions of an audiovisual non-word until their looking-time decreased to a predetermined criterion. They were then presented two types of test trials: repetitions of the old word (non-alternating (NA) trials) and repetitions of a novel non-word alternating with the old word (alternating (A) trials). Longer looking times to the A relative to the NA trials was taken as evidence of discriminating the non-words. An audiovisual non-speech trial was presented at the beginning and the end of each experiment and looking times between speech and non-speech trials were compared. Analyses revealed that pre- and post-CI infants had significantly shorter looking times than NH infants for speech but not non-speech trials. Furthermore, deaf infants often did not look long enough to be exposed to the novel non-word during the A trials. When trials with less than three seconds of looking were removed, analyses revealed that both NH infants and post-CI infants discriminated the non-words but pre-CI infants did not. Pre-implant hearing, age at implantation, and length of CI use were not related to visual preference for A trials. These results suggest that PLD infants show less visual interest in speech stimuli than NH infants. Despite this, PLD infants appear to be able to discriminate audiovisual non-words within three months after implantation.

AB - The benefit of early cochlear implantation (CI) to later speech perception outcomes in prelingually deaf (PLD) children is well established and implantation of infants has become more prevalent. The aim of this study was to determine whether or not deaf infants could discriminate audiovisual non-words shortly after CI and whether their attention to speech and non-speech audiovisual stimuli was similar to infants with normal hearing (NH). Three groups of participants were tested: PLD infants tested prior to CI (pre-CI), PLD infants tested post-implantation (post-CI), and a group of age-matched NH infants. A novel version of the visual habituation (VH) procedure was used. Infants were presented repetitions of an audiovisual non-word until their looking-time decreased to a predetermined criterion. They were then presented two types of test trials: repetitions of the old word (non-alternating (NA) trials) and repetitions of a novel non-word alternating with the old word (alternating (A) trials). Longer looking times to the A relative to the NA trials was taken as evidence of discriminating the non-words. An audiovisual non-speech trial was presented at the beginning and the end of each experiment and looking times between speech and non-speech trials were compared. Analyses revealed that pre- and post-CI infants had significantly shorter looking times than NH infants for speech but not non-speech trials. Furthermore, deaf infants often did not look long enough to be exposed to the novel non-word during the A trials. When trials with less than three seconds of looking were removed, analyses revealed that both NH infants and post-CI infants discriminated the non-words but pre-CI infants did not. Pre-implant hearing, age at implantation, and length of CI use were not related to visual preference for A trials. These results suggest that PLD infants show less visual interest in speech stimuli than NH infants. Despite this, PLD infants appear to be able to discriminate audiovisual non-words within three months after implantation.

KW - Cochlear implant

KW - Infant speech perception

KW - Outcomes

KW - Visual habituation

UR - http://www.scopus.com/inward/record.url?scp=35948940396&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=35948940396&partnerID=8YFLogxK

U2 - 10.1080/16513860701659438

DO - 10.1080/16513860701659438

M3 - Article

VL - 5

SP - 232

EP - 241

JO - Audiological Medicine

JF - Audiological Medicine

SN - 1651-386X

IS - 4

ER -