Event-related potential correlates of task switching and switch costs
Event-related potential correlates of task switching and switch costs
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DOI：
10.1111/j.1469-8986.2005.00262.x
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发表时间：
2005-01-01
期刊：
影响因子：
3.7
通讯作者：
Hetrick, WP
中科院分区：
文献类型：
--
作者：
Kieffaber, PD;Hetrick, WP
任务切换的研究表明，任务切换与响应成本，这些成本降低时，提示提前开关。本研究探讨了39名受试者在线索匹配/不匹配辨别任务中任务转换和转换成本的皮层事件相关电位相关性。与非开关试验相比，开关试验与更大的线索相关的，预期的P3 b样波形。转换试验也与较小的目标相关，刺激依赖性P2和P3样成分。此外，开关相关的幅度变化在P3 b的线索和P2的目标与独特的组件的剩余开关成本。研究结果支持所有的整合模型的任务转换与互补，但不同的角色，预期和刺激依赖的过程中的任务转换和转换成本。
Studies of task switching demonstrate that task switches are associated with response costs and that these costs are reduced when a Cue is presented in advance of a switch. The present study examined cortical event-related potential correlates of task switching and switch costs in 39 participants during a cued match/mismatch discrimination task. Compared with non-switch trials, switch trials were associated with a larger cue-related, anticipatory P3b-like waveform. Switch trials were also associated with smaller target-related, stimulus-dependent P2 and P3-like components. Moreover, the switch-related amplitude variability in the P3b to the cue and the P2 to the target were associated with unique components of the residual switch costs. The results support all integrated model of task switching with complementary yet distinct roles for anticipatory and stimulus-dependent processes in task switching and switch costs.