The self in conflict: The role of executive processes during truthful and deceptive responses about attitudes
The self in conflict: The role of executive processes during truthful and deceptive responses about attitudes
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DOI：
10.1016/j.neuroimage.2007.08.032
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发表时间：
2008-01-01
期刊：
影响因子：
5.7
通讯作者：
Zhu, John
中科院分区：
文献类型：
--
作者：
Johnson, Ray, Jr.;Henkell, Heather;Zhu, John
本研究通过考察执行过程在评价性判断欺骗中的作用，扩展了以往关于特定记忆欺骗的研究成果。此外，鉴于以前的研究欺骗没有包括效价操纵，我们还想确定是否项目的好/坏方面会影响过程中使用的欺骗。因此，我们比较了行为和事件相关电位（ERP）活动，而参与者作出真实和定向谎言（即，与事实相反）对他们强烈同意或不同意的态度项目的反应。与以前的结果相一致，欺骗性反应需要更大的认知控制，如较慢的RT，较大的内侧额叶负波（MFN）和较小的后期积极成分比真实的反应。此外，这些欺骗相关效应的大小取决于参与者分配给项目的效价（即，同意/不同意）。定向谎言反应的态度也导致大大减少反应前的积极性，这表明参与者战略性地监测他们的反应，即使在没有明确的任务要求。项目价也不同的影响幅度的三个ERP组件在650毫秒的反应前的间隔，独立的真实或欺骗性的反应。使用偶极子位置的基础上，从功能磁共振成像研究的评价性判断和欺骗的结果分析表明，ERP和功能磁共振成像结果之间的高度重叠，并揭示了可能的时间特性的血流动力学激活。(C)2007爱思唯尔公司All rights reserved.
This study sought to extend previous results regarding deceptions about specific memories by investigating the role of executive processes in deceptions about evaluative judgments. In addition, given that previous studies of deception have not included valence manipulations, we also wanted to determine whether the goodness/badness aspect of the items would affect the processes used during deception. Thus, we compared behavioral and event-related potential (ERP) activity while participants made truthful and directed lie (i.e., press opposite of the truth) responses about attitude items with which they either strongly agreed or disagreed. Consistent with previous results, deceptive responses required greater cognitive control as indicated by slower RTs, larger medial frontal negativities (MFN) and smaller late positive components than truthful responses. Furthermore, the magnitude of these deception-related effects was dependent on the valence that participants assigned to the items (i.e., agree/disagree). Directed lie responses about attitudes also resulted in greatly reduced pre-response positivities, an indication that participants strategically monitored their responses even in the absence of explicit task demands. Item valence also differentially affected the amplitude of three ERP components in a 650 ms pre-response interval, independently of whether truthful or deceptive responses were made. Analyses using dipole locations based on results from fMRI studies of evaluative judgments and deception indicated a high degree of overlap between the ERP and fMRI results and revealed the possible temporal characteristics of the hemodynamic activations. (C) 2007 Elsevier Inc. All rights reserved.