Temporal features of the degree effect in self-relevance: Neural correlates
Temporal features of the degree effect in self-relevance: Neural correlates
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DOI：
10.1016/j.biopsycho.2011.03.012
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发表时间：
2011-05-01
影响因子：
2.6
通讯作者：
Li, Hong
中科院分区：
文献类型：
--
作者：
Chen, Jie;Yuan, Jiajin;Li, Hong
本研究探讨了自我关联程度心理加工的神经相关因素。当受试者执行三刺激古怪任务时，记录了不同自我相关程度的分散注意力的名字的事件相关电位。结果表明，在P2成分上，高自我相关的名字比中等自我相关、低自我相关和非自我相关的名字具有更大的波幅和更长的潜伏期。此外。高自我相关和中等自我相关的名字比低自我相关和非自我相关的名字的N2振幅降低。此外，在P3和440-540 ms的时间间隔内，高自我相关的名字比中等自我相关的名字引起更大的正偏转，而中等自我相关的名字又比低自我相关和非自我相关的名字引起更大的正偏转。此外，高自我相关和中等自我相关条件下的P3峰潜伏期比低自我相关和非自我相关条件下的P3峰潜伏期延长。因此，除了复制经典的自我相关效应，本研究扩展了以往的研究，显示了一个明确的自我相关程度的效果，与高自我相关刺激处理更优先于那些低的自我相关性在大脑中。(C)出版社：Elsevier B. V.
The present study investigated neural correlates underlying the psychological processing of the extent of self-relevance. Event-related potentials were recorded for distracting names different in extent of self-relevance while subjects performed a three-stimulus oddball task. The results showed larger amplitudes and prolonged latencies for high self-relevant than for moderate self-relevant, low self-relevant and non-self-relevant names at P2 component. Furthermore. N2 amplitudes were decreased for the high self-relevant and moderate self-relevant names than for the low self-relevant and non-self-relevant names. Moreover, the high self-relevant names elicited larger positive deflections than the moderate self-relevant names which, in turn, elicited larger positive deflections than the low self-relevant and non-self-relevant names at both P3 and 440-540 ms intervals. Additionally, the peak latencies of P3 were prolonged during the high self-relevant and moderate self-relevant than during the low self-relevant and non-self-relevant conditions. Therefore, in addition to replicating the classic self-relevant effect, the present study extended previous studies by showing a clear self-relevant degree effect, with high self-relevant stimuli processed more preferentially in the brain relative to those low in self-relevance. (C) 2011 Published by Elsevier B.V.