Visual Influences on Perception of Speech and Nonspeech Vocal-Tract Events
Identifieur interne : 000971 ( Ncbi/Curation ); précédent : 000970; suivant : 000972Visual Influences on Perception of Speech and Nonspeech Vocal-Tract Events
Auteurs : Lawrence Brancazio [États-Unis] ; Catherine T. Best [États-Unis] ; Carol A. Fowler [États-Unis]Source :
- Language and speech [ 0023-8309 ] ; 2006.
Abstract
We report four experiments designed to determine whether visual information affects judgments of acoustically-specified nonspeech events as well as speech events (the “McGurk effect”). Previous findings have shown only weak McGurk effects for nonspeech stimuli, whereas strong effects are found for consonants. We used click sounds that serve as consonants in some African languages, but that are perceived as nonspeech by American English listeners. We found a significant McGurk effect for clicks presented in isolation that was much smaller than that found for stop-consonant-vowel syllables. In subsequent experiments, we found strong McGurk effects, comparable to those found for English syllables, for click-vowel syllables, and weak effects, comparable to those found for isolated clicks, for excised release bursts of stop consonants presented in isolation. We interpret these findings as evidence that the potential contributions of speech-specific processes on the McGurk effect are limited, and discuss the results in relation to current explanations for the McGurk effect.
Url:
PubMed: 16922061
PubMed Central: 2773261
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<front><div type="abstract" xml:lang="en"><p id="P1">We report four experiments designed to determine whether visual information affects judgments of acoustically-specified nonspeech events as well as speech events (the “McGurk effect”). Previous findings have shown only weak McGurk effects for nonspeech stimuli, whereas strong effects are found for consonants. We used click sounds that serve as consonants in some African languages, but that are perceived as nonspeech by American English listeners. We found a significant McGurk effect for clicks presented in isolation that was much smaller than that found for stop-consonant-vowel syllables. In subsequent experiments, we found strong McGurk effects, comparable to those found for English syllables, for click-vowel syllables, and weak effects, comparable to those found for isolated clicks, for excised release bursts of stop consonants presented in isolation. We interpret these findings as evidence that the potential contributions of speech-specific processes on the McGurk effect are limited, and discuss the results in relation to current explanations for the McGurk effect.</p>
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