Analyzing the effect of sibling number on input and output in the first 18 months.
Analyzing the effect of sibling number on input and output in the first 18 months.
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分析前 18 个月兄弟姐妹数量对输入和输出的影响。
DOI：
10.1111/infa.12578
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发表时间：
2024
期刊：
影响因子：
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通讯作者：
Bergelson,Elika
中科院分区：
文献类型：
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作者：
Laing,Catherine;Bergelson,Elika
先前的研究表明，在广泛的认知，教育和基于健康的措施中，第一个出生的孩子表现优于后来出生的同龄人。使用自然主义家庭记录数据和父母词汇报告扩展这些文献，我们发现，在43名来自中高社会经济地位家庭的英语学习美国儿童的样本中，早期语言结果因兄弟姐妹数量而异。更具体地说，我们发现，在我们的样本中，有两个或更多（但不是一个）哥哥姐姐的孩子在18个月时的生产词汇量较小，并且在几项措施中从照顾者那里听到的输入比他们的同龄人少，少于两个兄弟姐妹。我们讨论了婴儿在婴儿期经历和学习的家庭规模的影响。
Prior research suggests that across a wide range of cognitive, educational, and health‐based measures, first‐born children outperform their later‐born peers. Expanding on this literature using naturalistic home‐recorded data and parental vocabulary reports, we find that early language outcomes vary by number of siblings in a sample of 43 English‐learning U.S. children from mid‐to‐high socioeconomic status homes. More specifically, we find that children in our sample with two or more—but not one—older siblings had smaller productive vocabularies at 18 months, and heard less input from caregivers across several measures than their peers with less than two siblings. We discuss implications regarding what infants experience and learn across a range of family sizes in infancy.