This systematic review surveyed research on the associations between sleep and the memory processes involved in word learning in infancy. We found only 16 studies that addressed this topic directly, identifying associations between infant sleep and the memory processes, the identification of word forms in running speech, and the stabilization and generalization of new word form–meaning associations. Some studies investigated changes in brain responses after word learning and in sleep parameters during postlearning sleep. Others investigated the long-term effects of sleeping patterns on later vocabulary development. All but one of these studies identified positive associations between sleep and word learning in early childhood, extending similar findings from studies on adults and school-aged children. However, there remain several gaps in the current research on early lexical development and sleep. Future investigations should address these gaps for researchers to better understand lexical development and to create links between memory and language acquisition research.

中文翻译：

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睡眠对婴儿期记忆和单词学习影响的系统评价

该系统评价调查了有关睡眠与婴儿期单词学习记忆过程之间关联的研究。我们发现只有 16 项研究直接涉及这个主题，确定婴儿睡眠与记忆过程之间的关联，识别正在运行的语音中的词形，以及新词形-意义关联的稳定和概括。一些研究调查了单词学习后大脑反应的变化以及学习后睡眠期间睡眠参数的变化。其他人调查了睡眠模式对以后词汇发展的长期影响。除了一项研究外，所有这些研究都确定了儿童早期睡眠和单词学习之间的正相关关系，扩展了对成人和学龄儿童的研究的类似发现。然而，目前关于早期词汇发育和睡眠的研究仍然存在一些差距。未来的调查应该解决这些差距，以便研究人员更好地理解词汇发展并在记忆和语言习得研究之间建立联系。