Sensorimotor influences on speech perception in infancy
| Autor: | Padmapriya Kandhadai, D. Kyle Danielson, Janet F. Werker, Alison G. Bruderer |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
Auditory perception
Male Speech production medicine.medical_specialty Speech perception Language delay media_common.quotation_subject Social Sciences Audiology Language Development 050105 experimental psychology 03 medical and health sciences 0302 clinical medicine Child Development Tongue Phonetics Perception medicine otorhinolaryngologic diseases Humans 0501 psychology and cognitive sciences media_common Ultrasonography Motor theory of speech perception Analysis of Variance Multidisciplinary 05 social sciences Infant Language development Sound Acoustic Stimulation Auditory Perception Speech Discrimination Tests Speech Perception Female Sensorimotor Cortex Psychology psychological phenomena and processes 030217 neurology & neurosurgery |
| Zdroj: | Proceedings of the National Academy of Sciences of the United States of America. 112(44) |
| ISSN: | 1091-6490 |
| Popis: | The influence of speech production on speech perception is well established in adults. However, because adults have a long history of both perceiving and producing speech, the extent to which the perception–production linkage is due to experience is unknown. We addressed this issue by asking whether articulatory configurations can influence infants’ speech perception performance. To eliminate influences from specific linguistic experience, we studied preverbal, 6-mo-old infants and tested the discrimination of a nonnative, and hence never-before-experienced, speech sound distinction. In three experimental studies, we used teething toys to control the position and movement of the tongue tip while the infants listened to the speech sounds. Using ultrasound imaging technology, we verified that the teething toys consistently and effectively constrained the movement and positioning of infants’ tongues. With a looking-time procedure, we found that temporarily restraining infants’ articulators impeded their discrimination of a nonnative consonant contrast but only when the relevant articulator was selectively restrained to prevent the movements associated with producing those sounds. Our results provide striking evidence that even before infants speak their first words and without specific listening experience, sensorimotor information from the articulators influences speech perception. These results transform theories of speech perception by suggesting that even at the initial stages of development, oral–motor movements influence speech sound discrimination. Moreover, an experimentally induced “impairment” in articulator movement can compromise speech perception performance, raising the question of whether long-term oral–motor impairments may impact perceptual development. |
| Databáze: | OpenAIRE |
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