Morasch Katherine C, Bell Martha Ann
Department of Psychology, 109 Williams Hall, Mail Code 0436, Blacksburg, VA 24061, USA.
Brain Cogn. 2009 Dec;71(3):215-22. doi: 10.1016/j.bandc.2009.08.012. Epub 2009 Sep 27.
This study of infant declarative memory concurrently examined brain-electrical activity and deferred imitation performance in 10-month-old infants. Continuous electroencephalogram (EEG) measures were collected throughout the activity-matched baseline, encoding (modeling) and retrieval (delayed test) phases of a within-subjects deferred imitation task. Infants were divided into two memory performance groups based on the exhibition of ordered-recall after a 24-h delay. Whereas no group differences were found in EEG collected during encoding, performance-group differences in EEG were present during retrieval. Infants who successfully displayed ordered-recall showed a pattern of increasing EEG from baseline to task at anterior temporal scalp locations, whereas infants showing no ordered-recall displayed no changes in EEG from baseline to task. These findings are discussed with respect to the biobehavioral developments underlying declarative memory abilities.
这项关于婴儿陈述性记忆的研究同时检测了10个月大婴儿的脑电活动和延迟模仿表现。在一项被试内延迟模仿任务的活动匹配基线、编码（模仿）和检索（延迟测试）阶段，收集了连续脑电图（EEG）测量数据。根据24小时延迟后的有序回忆表现，婴儿被分为两个记忆表现组。虽然在编码过程中收集的脑电图中未发现组间差异，但在检索过程中脑电图存在表现组差异。成功表现出有序回忆的婴儿在前颞头皮位置显示出从基线到任务时脑电图增加的模式，而没有表现出有序回忆的婴儿从基线到任务时脑电图没有变化。这些发现是基于陈述性记忆能力背后的生物行为发展进行讨论的。
