Effects of joint attention on long-term memory in 9-month-old infants: an event-related potentials study
Effects of joint attention on long-term memory in 9-month-old infants: an event-related potentials study
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DOI：
10.1111/j.1467-7687.2010.01010.x
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发表时间：
2011-07-01
影响因子：
3.7
通讯作者：
Lindenberger, Ulman
中科院分区：
文献类型：
--
作者：
Kopp, Franziska;Lindenberger, Ulman
联合注意力在生命的第一年发展，但对其对长期记忆的影响知之甚少。我们研究了联合注意是否调节9个月大婴儿的长期记忆。婴儿熟悉视觉呈现的物体在两种条件下，不同程度的联合注意（高与低）。在熟悉阶段（立即识别）和延迟1周（延迟识别）后，直接探测对旧物体和新物体的EEG指标。在即时识别中，正性慢波活动的幅度受到联合注意的调制。在延迟再认中，铅成分的幅度在高、低联合注意之间存在差异。此外，在立即和延迟识别过程中的正慢波幅度与婴儿在熟悉过程中向实验者看的频率相关。在高联合注意力和低联合注意力条件下，对不熟悉物体的处理都与增强的Arc成分相关。我们的研究结果表明，在即时和延迟识别过程中，联合注意的程度调制脑电。我们的结论是，联合注意影响9个月大的婴儿的长期记忆处理，通过提高相关的出席项目。
Joint attention develops during the first year of life but little is known about its effects on long-term memory. We investigated whether joint attention modulates long-term memory in 9-month-old infants. Infants were familiarized with visually presented objects in either of two conditions that differed in the degree of joint attention (high versus low). EEG indicators in response to old and novel objects were probed directly after the familiarization phase (immediate recognition), and following a 1-week delay (delayed recognition). In immediate recognition, the amplitude of positive slow-wave activity was modulated by joint attention. In the delayed recognition, the amplitude of the Pb component differentiated between high and low joint attention. In addition, the positive slow-wave amplitude during immediate and delayed recognition correlated with the frequency of infants' looks to the experimenter during familiarization. Under both high- and low-joint-attention conditions, the processing of unfamiliar objects was associated with an enhanced Arc component. Our results show that the degree of joint attention modulates EEG during immediate and delayed recognition. We conclude that joint attention affects long-term memory processing in 9-month-old infants by enhancing the relevance of attended items.