Hemispheric specialization in infant chimpanzees (Pan troglodytes): evidence for a relation with gender and arousal.
Hemispheric specialization in infant chimpanzees (Pan troglodytes): evidence for a relation with gender and arousal.
复制标题
婴儿黑猩猩（Pan troglodytes）的半球特化：与性别和唤醒关系的证据。
DOI：
10.1002/dev.420260405
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发表时间：
1993
影响因子：
2.2
通讯作者：
Bard,KA
中科院分区：
文献类型：
--
作者：
Hopkins,WD;Bard,KA
目前的研究扩展了先前关于婴儿黑猩猩的手到口的自我安慰行为的行为不对称性的文献。通过比较新生儿唤醒水平、调节能力和运动表现的个体差异与3个月时偏侧程度的个体差异，研究了偏侧化手-口、自我平静行为的潜在来源。3个月大时不对称的手到嘴，自我平静的行为与2天大时的一般唤醒显著相关（即，由Brazelton新生儿行为评估量表测量的状态聚类评分范围）。简单地说，与非右撇子个体相比，在手对嘴行为中具有右手偏好的黑猩猩在2天大时表现出较低的唤醒。状态范围聚类中唯一区分受试者的项目是易怒：右撇子受试者不那么易怒。以前，有报道称，手到嘴行为的偏侧性存在性别差异的趋势。随着本研究中受试者数量的增加，我们发现女性（13人中的12人）比男性（15人中的9人）表现出明显更大的右手偏手行为。我们的结论是，新生儿唤醒能力，而不是调节能力或运动表现，预测了3个月大黑猩猩的手到嘴，自我平静行为中发现的偏侧程度。这些数据从影响偏侧发育的早期分娩或宫内因素的角度进行了讨论。John Wiley & Sons，Inc.
The current study extends previous documentation of behavioral asymmetries in hand‐to‐mouth, self‐consoling behaviors of infant chimpanzees. The underlying source of lateralized hand‐to‐mouth, self‐calming behavior was investigated by comparing individual differences in neonatal arousal levels, regulatory ability, and motor performance with individual differences in the degree of laterality at 3 months. Asymmetrical hand‐to‐mouth, self‐calming behaviors at 3 months of age were significantly related to general arousal at 2 days of age (i.e., the Range of State cluster scores measured by the Brazelton Neonatal Behavioral Assessment Scale). Simply stated, chimpanzees with a right‐hand bias in hand‐to‐mouth behavior exhibited lower arousal at 2 days of age compared with nonright‐handed individuals. The only item of the Range of State cluster to distinguish subjects was irritability: Right‐handed subjects were less irritable. Previously, a trend was reported with respect to sex differences in the laterality of hand‐to‐mouth behavior. With the greater number of subjects in the present study, we found that females exhibited a significantly greater right‐hand bias for hand‐to‐mouth behaviors (12 of 13) than did males (9 of 15). We conclude that neonatal arousability, and not regulatory capacity or motor performance, predicts the degree of laterality found in hand‐to‐mouth, self‐calming behaviors in 3‐month‐old chimpanzees. These data are discussed from the standpoint of early pari‐parturitional or intrauterine factors affecting lateralized development. © 1993 John Wiley & Sons, Inc.