Session JEP orale O6 Production et perception Vendredi 13 Juin - 10h30 12h30
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.