TY - JOUR
T1 - Experiments on auditory-visual perception of sentences by users of unilateral, bimodal, and bilateral cochlear implants
AU - Dorman, Michael
AU - Liss, Julie
AU - Wang, Shuai
AU - Berisha, Visar
AU - Ludwig, Cimarron
AU - Natale, Sarah Cook
N1 - Funding Information:
This article reports the results from the PhD dissertation of Shuai Wang and the master’s-thesis work of Cimarron Ludwig. Experiment 3 was entirely the work of Shuai Wang and Visar Berisha. These projects were supported by National Institute on Deafness and Other Communication Disorders Grants R01 DC 010821 and R01 DC DC010494, awarded to Michael F. Dorman, and R01 DC006859, awarded to Julie Liss.
Publisher Copyright:
© 2016 American Speech-Language-Hearing Association.
PY - 2016
Y1 - 2016
N2 - Purpose: Five experiments probed auditory-visual (AV) understanding of sentences by users of cochlear implants (CIs). Method: Sentence material was presented in auditory (A), visual (V), and AV test conditions to listeners with normal hearing and CI users. Results: (a) Most CI users report that most of the time, they have access to both A and V information when listening to speech. (b) CI users did not achieve better scores on a task of speechreading than did listeners with normal hearing. (c) Sentences that are easy to speechread provided 12 percentage points more gain to speech understanding than did sentences that were difficult. (d) Ease of speechreading for sentences is related to phrase familiarity. (e) Users of bimodal CIs benefit from low-frequency acoustic hearing even when V cues are available, and a second CI adds to the benefit of a single CI when V cues are available. (f) V information facilitates lexical segmentation by improving the recognition of the number of syllables produced and the relative strength of these syllables. Conclusions: Our data are consistent with the view that V information improves CI users’ ability to identify syllables in the acoustic stream and to recognize their relative juxtaposed strengths. Enhanced syllable resolution allows better identification of word onsets, which, when combined with place-of-articulation information from visible consonants, improves lexical access.
AB - Purpose: Five experiments probed auditory-visual (AV) understanding of sentences by users of cochlear implants (CIs). Method: Sentence material was presented in auditory (A), visual (V), and AV test conditions to listeners with normal hearing and CI users. Results: (a) Most CI users report that most of the time, they have access to both A and V information when listening to speech. (b) CI users did not achieve better scores on a task of speechreading than did listeners with normal hearing. (c) Sentences that are easy to speechread provided 12 percentage points more gain to speech understanding than did sentences that were difficult. (d) Ease of speechreading for sentences is related to phrase familiarity. (e) Users of bimodal CIs benefit from low-frequency acoustic hearing even when V cues are available, and a second CI adds to the benefit of a single CI when V cues are available. (f) V information facilitates lexical segmentation by improving the recognition of the number of syllables produced and the relative strength of these syllables. Conclusions: Our data are consistent with the view that V information improves CI users’ ability to identify syllables in the acoustic stream and to recognize their relative juxtaposed strengths. Enhanced syllable resolution allows better identification of word onsets, which, when combined with place-of-articulation information from visible consonants, improves lexical access.
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U2 - 10.1044/2016_JSLHR-H-15-0312
DO - 10.1044/2016_JSLHR-H-15-0312
M3 - Article
C2 - 27960006
AN - SCOPUS:85006995085
SN - 1092-4388
VL - 59
SP - 1505
EP - 1519
JO - Journal of Speech, Language, and Hearing Research
JF - Journal of Speech, Language, and Hearing Research
IS - 6
ER -