Psychological Sciences, University of California, Merced, California, United States of America.
Department of Communication, University of California, Los Angeles, California, United States of America.
PLoS One. 2020 Nov 25;15(11):e0242232. doi: 10.1371/journal.pone.0242232. eCollection 2020.
This study used LENA recording devices to capture infants' home language environments and examine how qualitative differences in adult responding to infant vocalizations related to infant vocabulary. Infant-directed speech and infant vocalizations were coded in samples taken from daylong home audio recordings of 13-month-old infants. Infant speech-related vocalizations were identified and coded as either canonical or non-canonical. Infant-directed adult speech was identified and classified into different pragmatic types. Multiple regressions examined the relation between adult responsiveness, imitating, recasting, and expanding and infant canonical and non-canonical vocalizations with caregiver-reported infant receptive and productive vocabulary. An interaction between adult like-sound responding (i.e., the total number of imitations, recasts, and expansions) and infant canonical vocalizations indicated that infants who produced more canonical vocalizations and received more adult like-sound responses had higher productive vocabularies. When sequences were analyzed, infant canonical vocalizations that preceded and followed adult recasts and expansions were positively associated with infant productive vocabulary. These findings provide insights into how infant-adult vocal exchanges are related to early vocabulary development.
本研究使用 LENA 录音设备来捕捉婴儿的家庭语言环境，并研究成人对婴儿发声的反应质量差异如何与婴儿词汇量相关。在对 13 个月大婴儿的全天家庭录音样本中，对婴儿指向性言语和婴儿发声进行了编码。婴儿言语相关的发声被确定并编码为规范或非规范。婴儿指向性成人言语被识别并分为不同的语用类型。多元回归分析考察了成人反应性、模仿、改写和扩展与 caregiver 报告的婴儿接受性和生产性词汇之间的关系，以及婴儿的规范和非规范发声。成人类似声音反应（即模仿、改写和扩展的总数）与婴儿规范发声之间的相互作用表明，产生更多规范发声并获得更多类似声音反应的婴儿具有更高的生产性词汇量。当对序列进行分析时，成人改写和扩展之前和之后的婴儿规范发声与婴儿生产性词汇呈正相关。这些发现为我们提供了有关婴儿-成人发声交流与早期词汇发展之间关系的深入了解。
