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Visual speech processing: word-decoding and word-discrimination related to sentence-based speechreading and hearing-impairment.

B Lyxell·J Rönnberg
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Abstract

Two aspects of visual speech processing in speechreading (word decoding and word discrimination) were tested in a group of 24 normal hearing and a group of 20 hearing-impaired subjects. Word decoding and word discrimination performance were independent of factors related to the impairment, both in a quantitative and a qualitative sense. Decoding skill, but not discrimination skill, was associated with sentence-based speechreading. The results were interpreted such that, in order to represent a critical component process in sentence-based speechreading, the visual speech perception task must entail lexically induced processing as a task-demand. The theoretical status of the word decoding task as one operationalization of a speech decoding module was discussed (Fodor, 1983). An error analysis of performance in the word decoding/discrimination tasks suggested that the perception of heard stimuli, as well as the perception of lipped stimuli, were critically dependent on the same features; that is, the temporally initial phonetic segment of the word (cf. Marslen-Wilson, 1987). Implications for a theory of visual speech perception were discussed.

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AdultAttentionFemaleHearing AidsHearing Loss, BilateralHearing Loss, SensorineuralHumansLipreadingMaleMiddle AgedPhoneticsSemanticsSpeech Discrimination TestsSpeech PerceptionJournal ArticleResearch Support, Non-U.S. Gov't

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BibTeXRIS

B Lyxell, J Rönnberg. 1991. Visual speech processing: word-decoding and word-discrimination related to sentence-based speechreading and hearing-impairment.. https://doi.org/10.1111/j.1467-9450.1991.tb00847.x

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