Event-related potentials during encoding: Comparing unitization to relational processing.
Event-related potentials during encoding: Comparing unitization to relational processing.
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DOI：
10.1016/j.brainres.2017.05.003
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发表时间：
2017-07-15
期刊：
影响因子：
2.9
通讯作者：
Diana RA
中科院分区：
文献类型：
--
作者：
Tu HW;Alty EE;Diana RA
语境细节通常通过与相关项目的任意关联被编码到情节记忆中，称为关系绑定。这些上下文细节的后续检索主要由回忆来支持。研究表明，如果语境细节被“单元化”，从而被编码为条目本身的特征，那么语境检索可以依赖于熟悉度。目前对单元化的研究主要集中在熟悉性和回忆对提取过程的贡献上，而对编码过程中的单元化知之甚少。为了开始将单元化理解为编码过程，我们使用事件相关电位来监控大脑活动，同时指示参与者使用关系联想或单元化来编码带有颜色信息的单词。结果表明，在呈现第二段特定策略句子时，基于单元化的编码在左顶区的负向电位显著多于关系编码。这种差异通过第三个句子片段的呈现继续下去，变得不那么偏向，并在最后两个句子片段呈现之前结束。在心理表象阶段，在中央的前200ms以及在左额颞区和顶枕区的400ms到1000ms范围内，基于单元化的编码比关系编码产生了更多的正向电位。我们的发现表明，单元化和关系加工大约在上下文项呈现在关系条件下时出现分歧。在心理想象中，单元化立即偏离了关系加工，这表明单元化影响了项目表征的性质，可能还影响了记忆编码过程中涉及的大脑区域。
Context details are typically encoded into episodic memory via arbitrary associations to the relevant item, known as relational binding. Subsequent retrieval of those context details is primarily supported by recollection. Research suggests that context retrieval can rely on familiarity if the context details are “unitized” and thereby encoded as features of the item itself in a single new representation. With most investigations into unitization focusing on the contributions of familiarity and recollection during retrieval, little is know n about unitization during encoding. In an effort to begin understanding unitization as an encoding process, we used event-related potentials to monitor brain activity while participants were instructed to encode words with color information using relational association or unitization. Results showed that unitization-based encoding elicited significantly more negative potentials in the left parietal region than relational encoding during presentation of the second segment of strategically-specific sentences. This difference continued through presentation of the third sentence segment, becoming less lateralized, and ended before the final two segments were presented. During the mental imagery period, unitization-based encoding elicited significantly more positive potentials than relational encoding in the first 200 ms centrally and from 400 through 1000 ms in left fronto-temporal and parieto-occipital regions. Our findings indicate that unitization and relational processing diverged at approximately the time that the context item was presented in the relational condition. During mental imagery, unitization diverged from relational processing immediately, suggesting that unitization affected the nature of the item representation, and possibly the brain regions involved, during memory encoding.
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影响因子：
2.6
作者：
Ford JH;Verfaellie M;Giovanello KS
通讯作者：
Giovanello KS
影响因子：
2.9
作者：
Diana RA;Van den Boom W;Yonelinas AP;Ranganath C
通讯作者：
Ranganath C
DOI：
10.1037/xlm0000170
发表时间：
2016-01
期刊：
Journal of experimental psychology. Learning, memory, and cognition
影响因子：
--
作者：
Tu HW;Diana RA
通讯作者：
Diana RA
DOI：
10.1037/0278-7393.34.4.730
发表时间：
2008-07
期刊：
Journal of experimental psychology. Learning, memory, and cognition
影响因子：
--
作者：
Diana RA;Yonelinas AP;Ranganath C
通讯作者：
Ranganath C
影响因子：
2.9
作者：
Stróżak P;Abedzadeh D;Curran T
通讯作者：
Curran T