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Auditory-visual fusion in speech perception in children with cochlear implants

Schorr, Efrat A. and Fox, Nathan A. and van Wassenhove, Virginie and Knudsen, Eric I. (2005) Auditory-visual fusion in speech perception in children with cochlear implants. Proceedings of the National Academy of Sciences of the United States of America, 102 (51). pp. 18748-18750. ISSN 0027-8424.

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Speech, for most of us, is a bimodal percept whenever we both hear the voice and see the lip movements of a speaker. Children who are born deaf never have this bimodal experience. We tested children who had been deaf from birth and who subsequently received cochlear implants for their ability to fuse the auditory information provided by their implants with visual information about lip movements for speech perception. For most of the children with implants (92%), perception was dominated by vision when visual and auditory speech information conflicted. For some, bimodal fusion was strong and consistent, demonstrating a remarkable plasticity in their ability to form auditory-visual associations despite the atypical stimulation provided by implants. The likelihood of consistent auditory-visual fusion declined with age at implant beyond 2.5 years, suggesting a sensitive period for bimodal integration in speech perception.

Item Type:Article
Additional Information:Copyright © 2005 by the National Academy of Sciences Contributed by Eric I. Knudsen, October 10, 2005. Published online before print December 8, 2005, 10.1073/pnas.0508862102 We thank P. Knudsen for design of the figures, F.P. Roth for design and supervision of the language assessments, and D. Poeppel for assistance with stimuli preparation. This work was supported by National Institute on Deafness and Other Communication Disorders Grant NRSA 1-F31DC006204-02 (to E.A.S.) and the Eugene L. Derlacki, M.D. Grant for Excellence in the Field of Hearing from the American Hearing Research Foundation (to N.A.F. and E.A.S.). Author contributions: E.A.S., N.A.F., and V.v.W. designed research; E.A.S. and N.A.F. performed research; E.A.S., N.A.F., V.v.W., and E.I.K. analyzed data; and E.A.S., N.A.F., and E.I.K. wrote the paper. Conflict of interest statement: No conflicts declared.
Subject Keywords:auditory visual integration; deafness; learning; sensitive periods; speech development
Record Number:CaltechAUTHORS:SCHOpnas05
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Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:6892
Deposited By: Archive Administrator
Deposited On:31 Dec 2006
Last Modified:14 Nov 2014 19:19

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