Component processes in task switching
Component processes in task switching
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DOI：
10.1006/cogp.2000.0736
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发表时间：
2000-11-01
影响因子：
2.6
通讯作者：
Sapir, A
中科院分区：
文献类型：
--
作者：
Meiran, N;Chorev, Z;Sapir, A
参与者在两个随机排序的两选择反应时间（RT）任务之间切换，其中指示性提示先于目标刺激并指示要执行的任务。任务转换成本在等待指令提示时被动地消散，以便知道执行哪个任务（在反应-提示间隔期间）。转换成本急剧下降，但没有废除，当参与者积极准备的任务切换，以响应教学线索（在线索-目标间隔）。任务转换的准备工作并不是通过阶段性警觉或预测目标发生而进行的一般准备工作的副产品。任务转换成本至少有三个组成部分，反映了（1）前一个任务集的被动耗散，（2）新任务集的准备，（3）剩余部分，（c）2000学术出版社。
Participants switched between two randomly ordered, two-choice reaction-time (RT) tasks, where an instructional cue preceded the target stimulus and indicated which task to execute. Task-switching cost dissipated passively while the participants waited for the instructional cue in order to know which task to execute (during the Response-Cue Interval). Switching cost was sharply reduced, but not abolished, when the participants actively prepared for the task switch in response to the instructional cue (during the Cue-Target Interval). The preparation for a task switch has shown not to be a by-product of general preparation by phasic alertness or predicting target onset. It is suggested that task-switching cost has at least three components reflecting (1) the passive dissipation of the previous task set, (2) the preparation of the new task set, and (3) a residual component, (c) 2000 Academic Press.