Sex differences in electrophysiological indices of conflict monitoring
Sex differences in electrophysiological indices of conflict monitoring
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DOI：
10.1016/j.biopsycho.2011.03.011
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发表时间：
2011-05-01
影响因子：
2.6
通讯作者：
Larson, Michael J.
中科院分区：
文献类型：
--
作者：
Clayson, Peter E.;Clawson, Ann;Larson, Michael J.
本研究的目的是探讨性别差异的认知控制所测量的刺激锁定N2成分的事件相关电位（ERP）。114名健康人（60名女性，54名男性）完成了改良的Eriksen Flanker任务。行为措施（即，错误率、反应时间）和N2振幅进行分析。在侧翼任务，女性的反应显着较慢，犯更多的错误比男性。对于N2振幅，有一个显着的主效应的一致性，增加振幅不一致的试验。重要的是，性别不同的一致性的函数，与男性表现出显着更大的不一致的N2振幅比女性。N2振幅的性别差异仍然存在于一个亚组的参与者，没有不同的行为，人口统计学和情感变量。冲突适应的电生理或行为指标无性别差异。结果表明，性别差异与冲突监测大脑激活。研究结果可以用两种相互矛盾的可能性来解释：（1）女性更有效地监控冲突，这是因为在匹配的子样本中，对于类似的行为表现，女性的神经激活比男性少，或者。(2)女性对冲突的监测不如男性有效。(C)2011 Elsevier B.V.保留所有权利。
The purpose of this study was to investigate sex differences in cognitive control as measured by the stimulus-locked N2 component of the event-related potential (ERP). High-density ERPs were obtained from 114 healthy individuals (60 females, 54 males) who completed a modified Eriksen Flanker Task. Behavioral measures (i.e., error rates, reaction times) and N2 amplitudes were analyzed. On the flanker task, females responded significantly slower and committed more errors than males. For N2 amplitude, there was a significant main effect of congruency, with increased amplitude to incongruent trials. Importantly, sexes differed as a function of congruency, with males showing significantly larger incongruent N2 amplitudes than females. Sex differences in N2 amplitude remained in a subgroup of participants that did not differ for behavioral, demographic, and affective variables. No sex differences were shown for electrophysiological or behavioral indices of conflict adaptation. Results indicate sex differences in brain activation associated with conflict monitoring. Findings may be explained by two contradictory possibilities: (1) females more effectively monitor conflict as indicated by less neural activation than males for similar behavioral performance in a matched subsample, or. (2) females less effectively monitor conflict than males. (C) 2011 Elsevier B.V. All rights reserved.