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N2pc成分的简述及Pd成分在N2pc相关研究中的发现与应用

Brief Introduction of N2pc Component and the Discovery and Application of Pd in N2pc Component Related Research

中国心理学前沿 / 2021,3(5)： 433-439 / 2021-05-07 791 825

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• 作者： 陈亦宣       余家奇     
• 单位：

  苏州大学教育学院，苏州

• 关键词： N2pc；Pd；视觉注意；事件相关电位
• N2pc; Pd; Visual attention; Event-related potential
• 摘要： N2pc成分是位于目标刺激对侧大脑后部的一个负波，由目标物的对侧ERP成分减去目标物同侧ERP成分得到，通常被当做对目标刺激注意分配的指标。在已有的研究中，研究者们发现实验任务、干扰物特征、认知负荷等因素对N2pc成分的波幅和潜伏期存在影响。此外，N2pc作为注意捕获的电生理指标，而Pd作为主动抑制指标的生理研究被大量使用于视觉注意的相关研究，并有助于研究持续的注意过程。在未来的研究中，N2pc和Pd成分的功能意义值得进一步探索，也可以尝试应用于针对特殊人群注意偏向的研究中去。
• The N2pc component is a negative amplitude located at the back of the brain of the opposite side of the target stimulus, which is obtained by subtracting the ERP component of the same side of the target from the ERP component of the opposite side. The N2pc component is a well-characterized index of the covert deployment of visual attention. In previous studies, researchers have found that the types of the experimental task, distractor characteristics, cognitive load, and other factors affect the amplitude and latency of the N2pc component. In addition, the N2pc component as an index of the covert deployment of visual attention and Pd as an index of suppression of potentially distracting non-target items are widely used in visual attention-related research, and contribute to the study of the sustained attention process. In the future, the functional significance of N2pc and Pd components should be further explored, and they can also be applied to the study of attentional bias in special populations.
• DOI： https://doi.org/10.35534/pc.0305053
• 引用： 陈亦宣，余家奇．N2pc 成分的简述及 Pd 成分在 N2pc 相关研究中的发现与应用［J］．中国心理学前沿，2021，3（5）： 433-439．