Irene de la Cruz-Pavía, J. Gervain, E. Vatikiotis-Bateson, J. Werker
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Coverbal speech gestures signal phrase boundaries: A production study of Japanese and English infant- and adult-directed speech
ABSTRACT The acoustic realization of phrasal prominence is proposed to correlate with the order of V(erbs) and O(bjects) in natural languages. The present production study with 15 talkers of Japanese (OV) and English (VO) investigates whether the speech signal contains coverbal visual information that covaries with auditory prosody, in Infant- and Adult-Directed Speech (IDS and ADS). Acoustic analysis revealed that phrasal prominence is carried by different acoustic cues in the two languages and speech styles, while analyses of motion showed that this acoustic prominence is not accompanied by coverbal gestures. Instead, the talkers of both languages produced eyebrow movements to mark the boundaries of target phrases within elicited utterances in combination with head nods. These results suggest that the signal might contain multimodal information to phrase boundaries, which could help listeners chunk phrases from the input.
期刊介绍：
The research published in Language Acquisition: A Journal of Developmental Linguistics makes a clear contribution to linguistic theory by increasing our understanding of how language is acquired. The journal focuses on the acquisition of syntax, semantics, phonology, and morphology, and considers theoretical, experimental, and computational perspectives. Coverage includes solutions to the logical problem of language acquisition, as it arises for particular grammatical proposals; discussion of acquisition data relevant to current linguistic questions; and perspectives derived from theory-driven studies of second language acquisition, language-impaired speakers, and other domains of cognition.
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