An ERP study of change detection, change blindness, and visual awareness
An ERP study of change detection, change blindness, and visual awareness
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DOI：
10.1111/1469-8986.00044
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发表时间：
2003-05-01
期刊：
影响因子：
3.7
通讯作者：
Revonsuo, A
中科院分区：
文献类型：
--
作者：
Koivisto, M;Revonsuo, A
对 12 名观察者研究了变化检测和变化盲视的电生理相关性。检测到的变化和未检测到的变化之间的 ERP 差异被认为是视觉意识的电生理相关性。两种不同的电生理反应与变化意识相关。首先，意识与刺激变化后 200 毫秒左右后部位的负振幅变化相关。负面转变的潜伏期随着任务难度和意识到变化的速度而变化。其次，与未检测到的变化相比，在刺激变化后 400 毫秒左右，检测到的变化的 ERP 变得更加积极，在顶叶部位达到峰值。我们认为，早期的消极性与视觉意识内容的变化有关，而后期的积极性可能反映了决策和行动规划所需的更多全局过程。
Electrophysiological correlates of change detection and change blindness were studied in 12 observers. The ERP difference between detected changes and undetected changes was considered an electrophysiological correlate of visual awareness. Two distinct electrophysiological responses correlated with the awareness of change. First, awareness was associated with a negative amplitude shift at posterior sites around 200 ms after the change in the stimulus. The latency of the negative shift varied as a function of the task difficulty and the speed of becoming aware of the change. Second, ERPs to detected changes became more positive as compared with undetected changes around 400 ms after the change in the stimulus, peaking at parietal sites. We suggest that the earlier negativity is associated with a change in the content of visual awareness, whereas the later positivity may reflect more global processes needed in decision making and action planning.