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KMID : 1036820190240010001
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Communication Sciences & Disorders
2019 Volume.24 No. 1 p.1 ~ p.8
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Canonical Babbling in Korean-Acquiring Infants at 4-9 Months of Age
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Ha Seung-Hee
Oller D. Kimbrough
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Abstract
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Objectives: Canonical babbling is a key feature of vocal development in the first year. This study aimed to examine changes in canonical babbling in Korean-acquiring infants from 4 to 9 months of age based on vocal samples obtained through all-day recordings in naturalistic environments.
Methods: Language ENvironment Analysis (LENA) all-day home recordings were obtained from 13 infants aged 4-6 months and 13 infants aged 7-9 months. Twenty 5-minute segments with the highest child vocalization rate were extracted from each infant’s LENA recording. The coders, who received intensive coding training, determined syllable types (canonical, non-canonical, glide, or glottal syllables) while listening to the selected recordings. The effects of age and gender were determined on the number of each syllable type and canonical babbling ratios (CBR).
Results: The results indicated that infants aged 7-9 months produced significantly more canonical syllables and showed higher CBR than infants aged 4-6 months. Eight 7 to 9-month-old infants had entered canonical babbling stage. Boys produced significantly more canonical syllables and showed higher CBR than girls in this study.
Conclusion: This study is the first effort to evaluate canonical babbling in Korean-acquiring infants and examine vocal development through a representative sampling of vocalizations in natural environments through day-long recordings.
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KEYWORD
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Canonical babbling, Language ENvironment Analysis, 4 to 9 months, Korean-acquiring children
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