Center for Studies of Psychological Application and School of Psychology, Key Laboratory of Mental Health and Cognitive Science of Guangdong Province, South China Normal University, Guangzhou, China.
Neuroreport. 2020 Aug 12;31(12):851-856. doi: 10.1097/WNR.0000000000001454.
N450 is described as a valid event-related potential indicator of Stroop interference, but the true specific psychological meaning of the Stroop N450 remains obscure. In the present research, we first used a Chinese character incongruent-eligible task and manipulated different types of conflict to investigate whether Stroop N450 reflects stimulus conflict, response conflict or both. The results showed that, only the N450 in the incongruent-eligible condition was more negative than that of the incongruent-ineligible and neutral conditions in the frontal-central area; simultaneously, there was a left parietal-occipital N450 that successively weakened in the incongruent-eligible, incongruent-ineligible and neutral conditions. These results indicate that Stroop N450 reflects both stimulus conflict and response conflict.
N450 被描述为 Stroop 干扰的有效事件相关电位指标，但 Stroop N450 的真正特定心理意义仍然不清楚。在本研究中，我们首先使用汉字不一致-合格任务，并操纵不同类型的冲突，以调查 Stroop N450 是否反映刺激冲突、反应冲突或两者兼而有之。结果表明，只有在不一致-合格条件下的 N450 在额-中央区域比不一致-不合格和中性条件更负；同时，在不一致-合格、不一致-不合格和中性条件下，存在一个从左顶枕区逐渐减弱的 N450。这些结果表明，Stroop N450 反映了刺激冲突和反应冲突。
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