KMID : 1036820240290010107
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Communication Sciences & Disorders 2024 Volume.29 No. 1 p.107 ~ p.116
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Temporal Characteristics of Infant Vocalization during Interaction with Adults
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Jeong Yu-Lim
Ha Seung-Hee
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Abstract
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Objectives: This study aimed to examine the temporal characteristics of infant vocalizations during interactions with adults in natural home environments.
Methods: One day LENA (Language ENvironment Analysis) recordings were collected from 20 infants aged 6 and 12 months. The collected data were analyzed by selecting 20 5-mintue intervals in the order of highest CTCs (conversational turn counts). In the analysis unit of turn-taking, interactions in which the infant responded within 0.05 seconds to 3 seconds after the adult spoke directly to the infant were regarded as one analysis unit. The temporal characteristics of infant vocalization during interactions with adults were examined through infants¡¯ Vocalization response ratio. The temporal characteristics of infant vocalization in interactions with adults were examined by the after adults¡¯ infant-directed speech (IDS), latency of vocalization response and overlapping vocalization ratio.
Results: Infants¡¯ Vocalization response ratio following IDS in adults did not differ significantly between the two age groups. Infants¡¯ Vocalization response latencies increased significantly with age from 6 to 12 months. Overlapping vocalization ratio showed a significant decrease with increasing age.
Conclusion: This study supports that as infants grow, they acquire temporal turn-taking skills. It also suggests that the temporal characteristics of infant vocalizations during interactions with adults may be a useful to predict infants¡¯ language development.
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KEYWORD
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Early vocalization, Turn-taking, Temporal characteristics of vocalizations, LENA
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