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The contribution of audiovisual speech to lexical-semantic processing in natural spoken sentences
Abstract : In everyday communication, natural spoken sentences are expressed in a multisensory way through
auditory signals and speakers’ visible articulatory gestures. An important issue is to know whether
audiovisual speech plays a main role in the linguistic encoding of an utterance until access to
meaning. To this end, we conducted an event-related potential experiment during which
participants listened passively to spoken sentences and a lexical recognition task. The results
revealed that N200 and N400 waves had a greater amplitude after semantically incongruous
words than after expected words. This effect of semantic congruency was increased over N200
in the audiovisual trials. Words presented audiovisually also elicited a reduced amplitude of the
N400 wave and a facilitated recovery in memory. Our findings shed light on the influence of
audiovisual speech on the understanding of natural spoken sentences by acting on the early
stages of word recognition in order to access a lexical-semantic network.
https://hal.univ-lille.fr/hal-03185866
Contributeur : Lilloa Université de Lille Connectez-vous pour contacter le contributeur
Soumis le : mardi 30 mars 2021 - 16:38:33
Dernière modification le : jeudi 1 avril 2021 - 03:21:52
Contributeur : Lilloa Université de Lille Connectez-vous pour contacter le contributeur
Soumis le : mardi 30 mars 2021 - 16:38:33
Dernière modification le : jeudi 1 avril 2021 - 03:21:52
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