Age differences in overlapping-task performance: Evidence for efficient parallel processing in older adults
Age differences in overlapping-task performance: Evidence for efficient parallel processing in older adults
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DOI：
10.1037//0882-7974.17.3.505
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发表时间：
2002-09-01
影响因子：
3.7
通讯作者：
McCann, RS
中科院分区：
文献类型：
--
作者：
Allen, PA;Lien, MC;McCann, RS
两个心理不应期（PRP）实验研究了年轻人和老年人的重叠加工。在任务1 （T-1）中使用形状识别任务（三角形或矩形），在任务2 （T-2）中使用词汇决策任务（单词或非单词）。PRP效应，即T-2反应时间随着刺激起效同步性（SOA）的减少而增加。词频对T-2的影响在较短的SOA中比在较长的SOA中更小，反映了松弛效应，在两个实验中，老年人比年轻人更大。这些结果表明，老年人可以在处理T-1的同时进行T-2的词汇获取，至少与年轻人一样有效。
Two psychological refractory period (PRP) experiments were conducted to examine overlapping processing in younger and older adults. A shape discrimination task (triangle or rectangle) for Task 1 (T-1) and a lexical-decision task (word or nonword) for Task 2 (T-2) were used. PRP effects, response time for T-2 increasing as stimulus onset synchrony (SOA) decreased, were obtained for both age groups. The effect of word frequency on T-2 was smaller at the short SOA than at the long SOA, reflecting slack effects, which were larger for older than younger adults in both experiments. These results suggest that older adults can perform lexical access of T-2 in parallel with the processing of T-1 at least as efficiently as younger adults.