Lateralized processes constrain auditory reinforcement in human newborns
Lateralized processes constrain auditory reinforcement in human newborns
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DOI：
10.1016/j.heares.2009.06.012
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发表时间：
2009-09-01
期刊：
影响因子：
2.8
通讯作者：
Prescott, Phyllis
中科院分区：
文献类型：
--
作者：
DeCasper, Anthony J.;Prescott, Phyllis
我们调查了人类新生儿的操作性吸吮反应学习。听觉检查器总是单耳出现，以观察它们的效力是否在耳朵之间存在差异。实验一：我们控制了两种刺激，一种是子宫内的心跳声，另一种是不熟悉的语言，让婴儿选择哪只耳朵接受刺激。只有当婴儿可以使用右耳时，不熟悉的言语才能增强学习，只有当婴儿可以使用左耳时，心跳才能增强学习。实验3 -我们控制耳朵，而婴儿选择他们的母亲与陌生人的声音和他们的母亲与外语之间。只有当婴儿能够使用左耳时，更熟悉的语言才能加强学习。我们提出，听觉系统的效能在不同的耳朵之间是不同的，因为新生儿的听觉系统，就像成年人的一样，通过左偏化处理其快速的时间变化和右偏化处理其持久的光谱特性来优化其感知清晰度。(C)2009爱思唯尔有限公司版权所有。
We investigated operant sucking response learning in human newborns. Auditory reinforcers always occurred monaurally to see whether their potency differed between ears. Experiment I - we controlled the reinforcers, either intrauterine heartbeat sounds or unfamiliar speech, while infants chose which ear received it. Experiment 2 - we controlled the reinforcers and the receiving ear. Unfamiliar speech reinforced learning only if infants could use their right ear and heartbeats reinforced learning only if infants could use their left ear. Experiment 3 - we controlled the ear while infants chose between their mothers' vs. a stranger's voice and between their mothers' vs. a foreign language. The more familiar speech reinforced learning only if infants could use their left ear. We proposed reinforcers' potencies differed between ears because the newborn's auditory system, just like adult's, optimizes their perceptual clarity by left-lateralized processing of their rapid temporal variations and right-lateralized processing of their longer-lasting spectral characteristics. (C) 2009 Elsevier B.V. All rights reserved.