Event-related potentials elicited by automatic targets: a dual-task analysis.
Event-related potentials elicited by automatic targets: a dual-task analysis.
复制标题
自动目标引发的事件相关电位：双任务分析。
DOI：
--
复制
发表时间：
1985
期刊：
影响因子：
--
通讯作者：
L. C. Oatman
中科院分区：
文献类型：
--
作者：
J. Hoffman;M. R. Houck;Frank W. Macmillan;R. Simons;L. C. Oatman
采用行为和事件相关脑电位（ERP）双任务范式，研究了有限容量加工在自动目标检测中的作用。一个自动检测任务与另一个并发歧视配对，而每个任务的相对重要性是系统变化的。由此产生的性能操作特性（POC）表明，自动检测响应的速度和准确性的影响分配的注意。每项任务准确性的降低都伴随着ERP（P300）晚期阳性成分幅度的降低。此外，在双任务条件下，自动目标诱发的P300成分的潜伏期增加。行为和ERP措施的比较表明，参与两个独立的有限容量的过程中自动检测：一个关注的目标发生的情景表示的形成，另一个与快速运动反应的执行。
The role of limited capacity processes in the detection of automatic targets was investigated in a dual-task paradigm using both behavioral and event-related brain potential (ERP) measures. An automatic detection task was paired with another concurrent discrimination while the relative importance of each task was systematically varied. The resulting performance operating characteristic (POC) showed that both the speed and accuracy of automatic detection responses were affected by the allocation of attention. Reductions in the accuracy of each task were accompanied by reductions in the amplitude of a late-positive component of the ERP (P300). In addition, the latency of the P300 component elicited by automatic targets was increased in dual-task conditions. A comparison of behavioral and ERP measures suggested the involvement of two separate limited-capacity processes in automatic detection: one concerned with the formation of an episodic representation of target occurrence and the other with the execution of rapid motor responses.