Telpaz Ariel, Yechiam Eldad
Max Wertheimer Minerva Center for Cognitive Studies, Faculty of Industrial Engineering and Management, Technion - Israel Institute of Technology Haifa, Israel.
Front Behav Neurosci. 2014 Apr 30;8:149. doi: 10.3389/fnbeh.2014.00149. eCollection 2014.
Frontal asymmetry measured at rest using EEG is considered a stable marker of approach-avoidance behaviors and risk taking. We examined whether without salient cues of attention in the form of losses, predictability is reduced. Fifty-seven participants performed an experiential decision task in a gain-only, loss-only, and mixed (gains and losses) condition. Increased risk taking on the part of individuals with relatively high left frontal activation, as denoted by the Alpha band, was only observed in the task involving both gains and losses. Event-related potential analysis sheds light on the processes leading to this pattern. Left-frontal dominant individuals had increased fronto-central P300 activation following risky compared to safe outcomes, while right-frontal dominant individuals did not show a P300 difference following safe and risky outcomes. This interaction also only emerged when losses were contrasted with gains. The findings highlight the sensitivity of behavioral predictability to cues of valence.
使用脑电图（EEG）在静息状态下测量的额叶不对称性被认为是趋近-回避行为和冒险行为的一个稳定指标。我们研究了在没有以损失形式出现的显著注意力线索的情况下，可预测性是否会降低。57名参与者在仅获利、仅损失和混合（获利与损失）条件下执行了一项体验性决策任务。只有在涉及获利和损失的任务中，才观察到由阿尔法波段表示的左额叶激活相对较高的个体冒险行为增加。事件相关电位分析揭示了导致这种模式的过程。与安全结果相比，左额叶占优势的个体在冒险结果后额中央P300激活增加，而右额叶占优势的个体在安全和冒险结果后未显示P300差异。这种相互作用也仅在将损失与获利进行对比时出现。研究结果突出了行为可预测性对价线索的敏感性。
