Jean-Luc Schwartz
Grenoble-INP
Session JEP poster P4 Mardi 10 Juin - 14h00 16h00
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papier 1587
Emergence du langage par jeux déictiques dans une société d'agents sensori-moteurs en interaction.
- Clément Moulin-Frier ( Grenoble-INP)
- Jean-Luc Schwartz ( Grenoble-INP)
- Julien Diard ( Université Pierre Mendes France)
- Pierre Bessière ( Université Joseph Fourier)
- Résumé : Dans cet article, nous montrons comment certaines propriétés du langage humain peuvent émerger d'une fonction plus primitive de déixis (action de montrer les choses). Pour cela, nous modélisons une société d'agents sensori-moteurs capables de produire des vocalisations et de pointer des objets dans leur environnement. Nous montrons alors comment certains principes de la Théorie de la Dispersion (Lindblom, 1972) et de la Théorie Quantique (Stevens, 1989) peuvent émerger de ces interactions entre agents.
- article
Session JEP orale O6 Production et perception Vendredi 13 Juin - 10h30 12h30
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papier 1611
Un circuit pariéto-frontal des bascules perceptives en parole : une étude iEEG
- Anahita Basirat ( GIPSA-Lab/ICP, CNRS UMR 5216, Grenoble INP, Université Joseph Fourier, Université Stendhal, Grenoble)
- Marc Sato ( GIPSA-Lab/ICP, CNRS UMR 5216, Grenoble INP, Université Joseph Fourier, Université Stendhal, Grenoble)
- Jean-Luc Schwartz ( GIPSA-Lab/ICP, CNRS UMR 5216, Grenoble INP, Université Joseph Fourier, Université Stendhal, Grenoble)
- Philippe Kahane ( Département de Neurologie et Psychiatrie & INSERM U836-UJF-CEA, Hôpital Michallon, Grenoble et 4 CTRS-IDEE, Hospices Civils de Lyon)
- Jean-Philippe Lachaux ( Unité Dynamique Cérébrale et Cognition, INSERM U821, Lyon)
- Résumé : The verbal transformation effect refers to perceptual alternations while listening to a speech sequence repeated rapidly. This effect is a rich source of information about the speech processing mechanism in the brain. In addition, the verbal transformation effect provides a tool for studying the mechanisms related to attention and decision making (including speech segmentation). In this work, using intracerebral EEG recordings from two epileptic patients, we find gamma activity related to verbal transformations in the left inferior frontal and the left supramarginal gyri. We discuss these findings in relation to perceptuo-motor linkes and dorsal circuit of speech perception. We also discuss the linke with a possible parieto-frontal circuit, already displayed in other perceptual takes.
- article
Session JEP orale O6 Production et perception Vendredi 13 Juin - 10h30 12h30
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papier 1668
Du percept auditif au geste articulatoire : les capacités perceptuo-motrices chez les enfants normolecteurs et dyslexiques
- Muriel Lalain ( GIPSA-Lab)
- Nathalie Vallée ( GIPSA-Lab)
- Jean-Luc Schwartz ( GIPSA-Lab)
- Résumé : It is an old matter of debate to determine to what extent perceptual and motor representations are connected in speech communication. A number of recent neurocognitive data show the existence of strong links between perception and action in the human brain. In the framework of our own perceptuo-motor theory in which speech units are considered as gestures shaped by perceptual processes, we have recently developed a new paradigm for studying the ability of listeners to recover vowel gestures from vowel sounds (Vallée et al., 2002). In this paper, we explore the ability of children, before and after the acquisition of reading (from 4 to 10 years old) to recover the basic vocalic gestures (height, frontness, rounding) from sound. We show that children are indeed able to perform these three tasks up to a certain extent. There appears a clear progress from 4 to 6 and from 6 to 10. An original algorithm enables to infer from these data an internal representational space for oral vowels. The space appears to increase in size and improve in regularity with age. A comparison with dyslexic children shows that at the same age (10 years old) there is a significant decrease in performance, associated to a poorer representation of the basic gestures.
- article