Event-related potentials elicited by unexpected visual stimuli after voluntary actions
Event-related potentials elicited by unexpected visual stimuli after voluntary actions
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DOI：
10.1016/j.ijpsycho.2007.08.004
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发表时间：
2007-12-01
影响因子：
3
通讯作者：
Nittono, Hiroshi
中科院分区：
文献类型：
--
作者：
Adachi, Shinobu;Morikawa, Koji;Nittono, Hiroshi
自愿行动后呈现的视觉刺激的事件相关电位被记录下来，以检查人们如何预期他们的行动效果。无论是在固定条件下，参与者总是按下中心按钮，还是在选择条件下，他们有选择地按下相应的左或右按钮，参与者都会对提示刺激(L或R)做出反应而按下一个按钮。在按下按钮后，第二个刺激(左或右)立即在视觉上呈现，以通知他们的动作被记录下来。当第二个刺激与线索刺激不匹配时(p=0.20)，在500-700ms的潜伏期内出现具有头皮后方分布的晚期正电位(LPP)。这种失配相关的LPP在选择条件下的幅度大于在固定条件下的幅度。研究结果表明，预期动作效果与实际动作效果之间的认知错配反映在LPP中，具体动作的选择强化了对其动作效果的预期。(C)2007 Elsevier B.V.保留所有权利。
Event-related potentials from visual stimuli that were presented after voluntary actions were recorded to examine how people expect their action effects. Participants pressed a button in response to a cue stimulus (L or R) either in the fixed condition where participants always pressed a center button or in the choice condition where they selectively pressed the corresponding left or right button. Immediately after the button press, a second stimulus (left or rigght) was presented visually to inform that their action was registered. When the second stimulus did not match the cue stimulus (p=.20), a late positive potential (LPP) with a posterior scalp distribution occurred in a latency range of 500-700 ms. The amplitude of this mismatch-related LPP was larger in the choice condition than in the fixed condition. The results suggest that the cognitive mismatch between the expected and actual action effects is reflected in the LPP, and the selection of a specific action strengthens the expectation of its action effect. (c) 2007 Elsevier B.V. All rights reserved.