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L'accès au lexique dans la perception audiovisuelle et visuelle de la parole

Abstract : Seeing the facial gestures of a speaker enhances phonemic identification in noise. The goal of this research was to assess whether this visual information can activate lexical representations. We investigated this question in adults (Experiment 1 to 4) and in children (Experiment 5). First, our results provide evidence indicating that visual information on consonant (Experiment 1) and vowel identity (Experiment 2) contributes to lexical activation processes during word recognition, when the auditory information is deteriorated by noise. Then, we also demonstrated that the mere presentation of the first two phonemes – i.e., the articulatory gestures of the initial syllable– is enough visual information to activate lexical representations and initiate the word recognition process (Experiment 3 and 4). However, our data suggest that visual speech mostly contributes in pre-lexical phonological -rather than lexical- processing in children till the age of 10 (Experiment 5). Key words : speech, visual and audiovisual speech, spoken word recognition, lexical access.
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https://tel.archives-ouvertes.fr/tel-00716384
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Submitted on : Tuesday, July 10, 2012 - 2:29:15 PM
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Mathilde Fort. L'accès au lexique dans la perception audiovisuelle et visuelle de la parole. Médecine humaine et pathologie. Université de Grenoble, 2011. Français. ⟨NNT : 2011GRENS034⟩. ⟨tel-00716384⟩

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