Chen Poyu, Hsieh Shulan
Department of Psychology, National Chung Cheng University, Chiayi, Taiwan.
Department of Psychology, National Cheng Kung University, No. 1, University Road, Tainan, 701, Taiwan.
Psychon Bull Rev. 2015 Oct;22(5):1389-402. doi: 10.3758/s13423-014-0789-9.
The present study investigated whether the advanced reconfiguration processes of the voluntary switching (VTS) paradigm were different from those of the instructed task switching (ITS) paradigm by examining event-related potentials (ERPs) in a within-subjects design. Of importance, given that effector-to-task mapping might lead to differential preparatory strategies, two effector-to-task mapping groups were studied: the hand-to-task (HAND) and finger-to-task (FINGER) groups. Intriguingly, we found the increased posterior negativity for voluntary switch (and/or increased posterior positivity for voluntary repeat) was exclusive to the HAND group, whereas the increased switch-related late posterior positivity in the ITS paradigm was independent of the effector manipulation. Moreover, the lateralized readiness potentials (LRP) and the mu and beta motor-related amplitude asymmetries indicated that the differential switch-related modulations were not the byproduct of hand-specific preparation. The advanced preparatory strategies in the VTS and ITS paradigms are discussed.
本研究通过在被试内设计中检测事件相关电位（ERP），探究了自愿切换（VTS）范式的高级重新配置过程是否与指令性任务切换（ITS）范式不同。重要的是，鉴于效应器与任务的映射可能导致不同的准备策略，研究了两个效应器与任务映射组：手与任务（HAND）组和手指与任务（FINGER）组。有趣的是，我们发现自愿切换时后部负波增加（和/或自愿重复时后部正波增加）仅在HAND组中出现，而ITS范式中与切换相关的晚期后部正波增加与效应器操作无关。此外，侧化准备电位（LRP）以及与μ和β运动相关的振幅不对称表明，与切换相关的差异调制不是特定于手的准备的副产品。讨论了VTS和ITS范式中的高级准备策略。
