Remembering the color of objects: An ERP investigation of source memory
Remembering the color of objects: An ERP investigation of source memory
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DOI：
10.1093/cercor/11.4.322
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发表时间：
2001-04-01
期刊：
影响因子：
3.7
通讯作者：
Snodgrass, JG
中科院分区：
文献类型：
--
作者：
Cycowicz, YM;Friedman, D;Snodgrass, JG
受试者学习用红色或绿色勾勒出的常见物体的图片，并被要求记住这些物体及其相关的颜色。事件相关电位（ERP）记录在随后的包括（即项目）和排除（即源）的记忆任务。实验的主要目的是确定熟悉和回忆的大脑特征，这两个被认为是情景记忆表现的行为过程，是否会在ERP结果的模式中观察到。对于正确识别的项目，早期，后旧/新的影响被记录（类似于300-600毫秒），项目和源记忆任务之间的幅度或头皮分布没有差异。随后的长时间枕部集中的负性（类似于800毫秒的峰值）是明显的源，但不是项目记忆任务。与源记忆任务中的“源错误”相关的ERP也显示出强烈的早期旧/新效应。然而，“源错误”ERP缺乏额叶头皮活动相比，与正确的源归因。这些数据表明，回忆性反应可能需要额叶参与，而基于熟悉程度的决定可能不需要。
Subjects studied pictures of common objects outlined in either red or green and were asked to memorize the objects and their associated colors. Event-related potentials (ERPs) were recorded during subsequent inclusion (i.e. item) and exclusion (i.e, source) memory tasks. The main goal of the experiment was to determine if brain signatures for familiarity and recollection, two behavioral processes thought to account for episodic memory performance, would be observed in the pattern of ERP results. For correctly recognized items, early, posterior old/new effects were recorded (similar to 300-600 ms) that did not differ in magnitude or scalp distribution between item and source memory tasks. A subsequent long-duration occipitally focused negativity (similar to 800 ms peak) was evident in the source hut not the item memory task. The ERPs associated with 'source errors' in the source memory task also showed robust early old/new effects. However, 'source error' ERPs lacked frontal scalp activity compared to those associated with correct source attribution. The data suggest that a recollective response may require frontal involvement whereas a decision based on familiarity may not.