THE ONSET OF SOCIAL SMILING IN PRETERM AND FULL-TERM INFANTS FROM 2 ETHNIC BACKGROUNDS
THE ONSET OF SOCIAL SMILING IN PRETERM AND FULL-TERM INFANTS FROM 2 ETHNIC BACKGROUNDS
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DOI：
10.1016/s0163-6383(82)80048-9
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发表时间：
1982-01-01
影响因子：
2.1
通讯作者：
ANISFELD, E
中科院分区：
文献类型：
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作者：
ANISFELD, E
以色列的两组婴儿，一组早产儿和一组足月婴儿，从出生到分娩后3个月被跟踪，试图确定在什么年龄第一次出现社交微笑。当以怀孕后的周数计算开始微笑的年龄时，早产婴儿和足月婴儿都在大约10岁时开始微笑。44-45工作。就实足年龄而言，早产婴儿比足月婴儿更晚才开始以这种方式进行社交反应。显然，在计算社交微笑的预期年龄时，应该充分考虑婴儿出生的早产周数。两个种族在开始微笑的年龄上发现了意想不到的差异，这打破了早产和足月的二分法。来自西班牙裔背景的婴儿开始微笑的时间明显早于来自德系犹太人背景的婴儿，无论他们是早产儿还是足月婴儿。
Two groups of infants in Israel, 1 preterm and 1 full-term, were followed from birth until 3 mo. post-due-date in an attempt to determine at what age social smiling first appeared. When the age of onset of smiling was calculated in number of weeks from conception, the perterm and full-term infants both began to smile at .apprx. 44-45 wk. In terms of chronological age, the preterms began to respond socially in this way much later than the full-terms. Apparently, full allowance should be made for the number of weeks preterm a baby is born, when calculating the expected age for the appearance of social smiling. Unanticipated differences were found between 2 ethnic groups in the age of onset of smiling, which cut across the preterm-full-term dichotomy. Infants from Sephardi backgrounds began to smile significantly earlier than infants from Ashkenazi backgrounds regardless of whether they were preterm of full-term.