Visual search does not remain efficient when executive working memory is working
Visual search does not remain efficient when executive working memory is working
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DOI：
10.1111/j.0956-7976.2004.00730.x
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发表时间：
2004-09-01
影响因子：
8.2
通讯作者：
Kim, MS
中科院分区：
文献类型：
--
作者：
Han, SH;Kim, MS
工作记忆（WM）被认为不仅包括短期记忆存储，而且还包括对记忆内容进行操作的执行过程。本研究采用双任务范式考察了工作记忆在搜索中的参与情况，在该范式中，参与者在进行视觉搜索的同时操纵或简单地维持工作记忆中的信息。实验1a和2a涉及执行WM任务，需要从一个目标数字向后计数和排序的字母串，分别。在这两个实验中，搜索斜率在双任务条件下显着陡峭比那些在搜索单独的条件下，表明执行WM操作任务的影响视觉搜索的效率。与此相反，当信息简单地保持在WM（实验1b和2b），搜索斜率之间的单任务和双任务条件没有差异。这些结果表明，WM资源相关的执行功能可能需要在视觉搜索。
Working memory (WM) has been thought to include not only short-term memory stores but also executive processes that operate on the contents of memory. The present study examined the involvement of WM in search using a dual-task paradigm in which participants performed visual search while manipulating or simply maintaining information held in WM. Experiments 1a and 2a involved executive WM tasks that required counting backward from a target digit and sorting a string of letters alphabetically, respectively. In both experiments, the search slopes in the dual-task condition were significantly steeper than those in a search-alone condition, indicating that performing the WM manipulation tasks influenced the efficiency of visual search. In contrast, when information was simply maintained in WM (Experiments 1b and 2b), search slopes did not differ between the single- and dual-task conditions. These results suggest that WM resources related to executive functions may be required in visual search.