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Lipreading and the Compensation for Coarticulation Mechanism
Vroomen,J. de Gelder,B.
Vroomen,J.
de Gelder,B.
Abstract
Listeners compensate for coarticulatory influences of one speech sound on another. We examined whether lipread information penetrates this perceptual compensation mechanism. Experiment 1 replicated the finding that when an /as/ or /a/ sound preceded a /ta/-/ka/ continuum, more velar stops were perceived in the context of /as/. Experiments 2 and 3 investigated whether the same phoneme boundary shift would be obtained when the context was lipread instead of heard. An ambiguous sound between /as/ and /a/ was dubbed on the video of a speaker articulating /as/ or /a/. Subjects relied on the lipread information when identifying the ambiguous fricative sound as /s/ or //, but there was no corresponding boundary shift in the following /ta/-/ka/ continuum. These results indicate that biasing of the fricative by lipread information and compensation for coarticulation can be dissociated.
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2001
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Vroomen, J & de Gelder, B 2001, 'Lipreading and the Compensation for Coarticulation Mechanism', Language, Cognition and Neuroscience, vol. 16, no. 5, pp. 661-672.