Wu Lili, Cai Huajian, Gu Ruolei, Luo Yu L L, Zhang Jianxin, Yang Jing, Shi Yuanyuan, Ding Lei
Key Laboratory of Mental Health, Institute of Psychology, Chinese Academy of Sciences, Beijing, China.
Key Laboratory of Behavioral Science, Institute of Psychology, Chinese Academy of Sciences, Beijing, China.
PLoS One. 2014 Jul 9;9(7):e101837. doi: 10.1371/journal.pone.0101837. eCollection 2014.
Behavioral research has established that humans implicitly tend to hold a positive view toward themselves. In this study, we employed the event-related potential (ERP) technique to explore neural manifestations of positive implicit self-esteem using the Go/Nogo association task (GNAT). Participants generated a response (Go) or withheld a response (Nogo) to self or others words and good or bad attributes. Behavioral data showed that participants responded faster to the self paired with good than the self paired with bad, whereas the opposite proved true for others, reflecting the positive nature of implicit self-esteem. ERP results showed an augmented N200 over the frontal areas in Nogo responses relative to Go responses. Moreover, the positive implicit self-positivity bias delayed the onset time of the N200 wave difference between Nogo and Go trials, suggesting that positive implicit self-esteem is manifested on neural activity about 270 ms after the presentation of self-relevant stimuli. These findings provide neural evidence for the positivity and automaticity of implicit self-esteem.
行为研究表明，人类潜意识里往往对自己持有积极看法。在本研究中，我们采用事件相关电位（ERP）技术，运用Go/NoGo联想任务（GNAT）来探究积极内隐自尊的神经表现。参与者对自我或他人的词语以及好或坏的属性做出反应（Go）或不做出反应（NoGo）。行为数据表明，与搭配坏的自我相比，参与者对搭配好的自我反应更快，而对他人则相反，这反映了内隐自尊的积极性质。ERP结果显示，与Go反应相比，Nogo反应在额叶区域的N200增强。此外，积极内隐自我-积极偏向延迟了Nogo和Go试验之间N200波差异的起始时间，表明积极内隐自尊在呈现与自我相关的刺激后约270毫秒的神经活动中表现出来。这些发现为内隐自尊的积极性和自动性提供了神经学证据。
