Task reconfiguration and carryover in task switching: An event-related potential study

Shulan Hsieh, Poyu Cheng

研究成果: Article同行評審

22 引文 斯高帕斯(Scopus)

摘要

This study investigated the electrophysiological correlates of the processes involved in task switching. A pair-wise task-switching paradigm was used where each trial comprised two tasks that were either the same (task repeat) or different (task switch). In the paradigm, task-switch and repeat trials are compared in conditions of foreknowledge and non-foreknowledge of the forthcoming task type and during different response-stimulus intervals (RSIs). The results of this study show that, before the second task began in a task-pair trial, i.e., during the RSI, there was a CNV-like negativity for all trials. This indicates a general anticipatory effect. In foreknowledge conditions, there is an additional switch-specific reconfiguration process followed by a task-specific (including both switch- and repeat-related) preparatory process. During the post-task 2 stage, P3b was found to be smaller in switch trials than in repeat trials. Such differential P3b between switch and repeat trials appeared earlier and larger in foreknowledge than in non-foreknowledge conditions. The results of this study support the existence of advance preparation and uphold the role of carryover effects in task switching.

原文English
頁(從 - 到)132-145
頁數14
期刊Brain Research
1084
發行號1
DOIs
出版狀態Published - 2006 四月 21

All Science Journal Classification (ASJC) codes

  • 神經科學 (全部)
  • 分子生物學
  • 神經病學(臨床)
  • 發展生物學

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