Memory changes with normal aging: behavioral and electrophysiological measures.
Memory changes with normal aging: behavioral and electrophysiological measures.
复制标题
DOI：
10.1111/1469-8986.3560669
复制
发表时间：
1998-11
期刊：
影响因子：
3.7
通讯作者：
C. Joyce;K. Paller;H. Mcisaac;M. Kutas
中科院分区：
文献类型：
--
作者：
C. Joyce;K. Paller;H. Mcisaac;M. Kutas
我们考察了年轻人和老年人在内隐(词汇决定)和外显(再认)记忆测试中的表现。两组新词和旧词在词汇判断时间上的差异是相同的，尽管老年人的速度要慢一些。在两组中，语义编码的再认准确率(老年人较低)高于非语义编码，而词汇决定时间不受影响。在词汇判断过程中，新旧单词的不同脑电位构成了重复效应，这反映了对旧单词的更大的积极(200-800ms)，特别是在左半球；这种影响在老年人中较小且较晚。语义编码任务中词汇记忆增强的电生理标记物为左侧正性(500-800ms)。老年人的影响比年轻人小，这为他们受损的识别过程提供了一个额外的指标。
We examined performance in young and elderly on an implicit (lexical decision) and an explicit (recognition) memory test. The difference in lexical decision times between old and new words was equivalent in the two groups, although the elderly were slower. In both groups, recognition accuracy (lower in the elderly) was higher following semantic than nonsemantic encoding, whereas lexical decision times were unaffected. Divergent brain potentials for old and new words during lexical decisions constituted a repetition effect, which reflected greater positivity (200-800 ms) for old words, particularly over the left hemisphere; this effect was smaller and later in the elderly. An electrophysiological marker of enhanced recollection for words from the semantic encoding task took the form of a left-sided positivity (500-800 ms). The effect was smaller in the elderly than the young, providing an additional index of their impaired recognition processes.