Sometimes we have to intentionally focus on the details: Incidental encoding and perceptual change decrease recognition memory performance and the ERP correlate of recollection
Sometimes we have to intentionally focus on the details: Incidental encoding and perceptual change decrease recognition memory performance and the ERP correlate of recollection
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DOI：
10.1016/j.bandc.2015.02.003
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发表时间：
2015-06-01
影响因子：
2.5
通讯作者：
Czernochowski, Daniela
中科院分区：
文献类型：
--
作者：
Haese, Andre;Czernochowski, Daniela
先前的研究认为记忆提取是基于两个独立的过程：回忆和熟悉。在这里，我们调查的作用，偶然的和有意的编码，特别是学习和测试之间的感知变化是否影响行为和电生理相关的检索过程。在检索过程中，参与者区分相同的和改变的范例，以及新的干扰。偶然编码后，参与者难以识别改变的样本;项目和特征识别增加故意编码后，特别是改变的样本。反映这种增加的记忆性能，ERP相关的回忆是较大的故意编码后，相同的项目重复，而ERP相关的熟悉程度在很大程度上不受影响。与刺激锁定平均值相比，与回忆后期方面（相对于刺激开始的700-1000 ms）相对应的反应前旧/新效应在反应中更大，但对于相同和变化的样本也具有相似的幅度。这些结果证实了以前的研究结果表明，电生理签名的回忆调制作为一个功能的记忆性能。任务的特点和材料检索记忆调制熟悉为基础的检索过程中的作用进行了讨论。(C)2015 Elsevier Inc. All rights reserved.
Prior studies suggest that memory retrieval is based on two independent processes: Recollection and familiarity. Here, we investigated the role of incidental and intentional encoding, and specifically whether perceptual changes between study and test affects behavioral and electrophysiological correlates of both retrieval processes. During retrieval, participants distinguished between identical and changed exemplars as well as novel distractors. Following incidental encoding, participants had difficulty identifying changed exemplars; item and feature recognition increased after intentional encoding, in particular for changed exemplars. Reflecting this increase in memory performance, the ERP correlate of recollection was larger after intentional encoding and for identical item repetitions, whereas the ERP correlate for familiarity was largely unaffected. Pre-response old/new effects corresponding to later aspects of recollection (700-1000 ms relative to stimulus onset) were larger in response-compared to stimulus-locked averages, but also of similar magnitude for identical and changed exemplars. These results corroborate previous findings suggesting that the electrophysiological signature of recollection is modulated as a function of memory performance. The role of task characteristics and material retrieved from memory for modulations in familiarity-based retrieval processes is discussed. (C) 2015 Elsevier Inc. All rights reserved.