Relationship between P300 amplitude and subsequent recall for distinctive events: dependence on type of distinctiveness attribute.
Relationship between P300 amplitude and subsequent recall for distinctive events: dependence on type of distinctiveness attribute.
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DOI：
10.1111/1469-8986.3750644
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发表时间：
2000-09
期刊：
影响因子：
3.7
通讯作者：
L. Otten;Emanuel Donchin
中科院分区：
文献类型：
--
作者：
L. Otten;Emanuel Donchin
独特的词汇会激发与事件相关的大脑电位的P300成分，也很可能被回忆起来。先前的研究表明，独特的单词引起的P300越大，这些单词被回忆起来的可能性就越大。本研究探讨了这种关系是否受到独特性诱导方式的影响。要么通过改变显示单词的字符大小，要么通过在近距离或远距离用边框将单词包围起来，来操纵区别性。所有的区别性特征都能提高回忆成绩。大小不同的词诱发出较大的P300，随后回忆的词的P300波幅较大。框架属性诱发了一个小的P300，并且这些P300的幅度与随后的回忆成绩没有相关性。相反，在远画面组中，前额慢波与随后的回忆表现相关。结果表明，P300波幅与后续回忆的关系取决于区分性属性的类型，因此不应归因于一般的区分性对记忆编码过程的影响。
Distinctive words elicit the P300 component of the event-related brain potential, and are also likely to be recalled. Previous studies have shown that the larger the P300 elicited by distinctive words, the more likely it is that those words will be recalled. The present study addressed whether this relationship is affected by the manner in which distinctiveness is induced. Distinctiveness was manipulated either by varying the size of the characters in which a word was displayed, or by surrounding the word with a frame at close or far distance. All distinctiveness attributes resulted in improved recall performance. The words whose size was distinctive elicited a large P300, and P300 amplitude was larger for subsequently recalled words. The frame attributes elicited a small P300, and the amplitude of these P300s was not correlated with subsequent recall performance. Instead, a frontal slow wave was correlated with subsequent recall performance in the far frame group. It is concluded that the relationship between P300 amplitude and subsequent recall depends on the type of distinctiveness attribute, and should therefore not be ascribed to a generalized effect of distinctiveness on memory encoding processes.