Audiovisual integration for perception of speech produced by nonnative speakers
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Speech often occurs in challenging listening environments, such as masking noise. Visual cues have been found to enhance speech intelligibility in noise. Although the facilitatory role of audiovisual integration for perception of speech has been established in native speech, it is relatively unclear whether it also holds true for speech produced by nonnative speakers. Native listeners were presented with English sentences produced by native English and native Korean speakers. The sentences were in either audio-only or audiovisual conditions. Korean speakers were rated as more accented in audiovisual than in the audio-only condition. Visual cues enhanced speech intelligibility in noise for native English speech but less so for nonnative speech. Reduced intelligibility of audiovisual nonnative speech was associated with implicit Asian-Foreign association, suggesting that listener-related factors partially influence the efficiency of audiovisual integration for perception of speech produced by nonnative speakers.
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