Fiche du document
25 août 2013
- ISIDORE Id: 10670/1.8d615b...
- hal: hal-00860230
info:eu-repo/semantics/OpenAccess
Mots-clés
Speech production development Speech motor control Co-articulation Speech planning -bio]/Neurons and Cognition [q-bio.NC]/Cognitive SciencesSujets proches
TalkingCiter ce document
Guillaume Barbier et al., « Speech planning as an index of speech motor control maturity », HAL SHS (Sciences de l’Homme et de la Société), ID : 10670/1.8d615b...
Métriques
Partage / Export
Résumé
This paper investigates speech motor control maturity in 4-year-old Canadian French children. Acoustic and ultrasound data recorded from four children, and for comparison, from four adults, are presented and analyzed. Maturity of speech motor control is assessed by measuring two characteristics: token-to-token variability of isolated vowels, as a measure of motor control accuracy, and extra-syllabic anticipatory coarticulation within V1-C-V2 sequences. In line with theories of optimal motor control, anticipatory coarticulation is assumed to be based on the use of internal models of the speech apparatus and its efficiency is considered to reflect the maturity of these representations. In agreement with former studies, token-to-token variability is larger in children than in adults. An anticipation of V2 in V1 was found in all adults but in none of the children studied so far. These results indicate that children's speech motor control is immature from two perspectives: insufficiently accurate motor control patterns for vowel production, and inability to anticipate forthcoming gestures. Both aspects are discussed and interpreted in the context of the immaturity of the internal representations of the speech motor apparatus in 4-year-old children.
