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Mixed-Language Input and Infant Volubility: Friend or Foe?
Yufang Ruan1,2, Krista Byers-Heinlein2,3,4, Adriel John Orena5
1School of Communication Sciences and Disorders, Faculty of Medicine and Health Sciences, McGill University, Montréal, Québec, Canada.
Bilingual children exposed to more language mixing were less vocal overall. However, within mixed-language contexts, more words heard correlated with more infant vocalizations, suggesting complex developmental links.
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Area of Science:
- Developmental Psychology
- Linguistics
- Child Language Acquisition
Background:
- Language mixing is prevalent in bilingual children's early linguistic input.
- The relationship between mixed-language input and early language development is not fully understood.
Purpose of the Study:
- To investigate the association between mixed-language input and infant vocal activeness (volubility).
- To examine this relationship at 10 and 18 months of age using both observational and parent-reported data.
Main Methods:
- Quantified mixed-language input through 30-second segment counts/proportions in day-long recordings.
- Included parent-reported scores for mixed-language input.
- Measured infant vocal activeness (volubility) at 10 and 18 months.
Main Results:
- Higher proportions or scores of mixed input in social contexts correlated with lower infant volubility.
- Within language-mixing contexts, infants hearing more words exhibited greater vocalizations.
- Divergent findings highlight the complexity of mixed input's impact.
Conclusions:
- The impact of mixed-language input on infant vocal development is nuanced and context-dependent.
- Further research is needed to elucidate the causal factors influencing these associations.
- Understanding these dynamics is crucial for comprehending bilingual language acquisition.