PDF(Pubmed)
Abstract：
Humans can selectively process information and make decisions by directing their attention to desired locations in their daily lives. Numerous studies have shown that attention increases the rate of correct responses and shortens reaction time, and it has been hypothesized that this phenomenon is caused by an increase in sensitivity of the sensory signals to which attention is directed. The present study employed psychophysical methods and electroencephalography (EEG) to test the hypothesis that attention accelerates the onset of information accumulation. Participants were asked to discriminate the motion direction of one of two random dot kinematograms presented on the left and right sides of the visual field, one of which was cued by an arrow in 80% of the trials. The drift-diffusion model was applied to the percentage of correct responses and reaction times in the attended and unattended fields of view. Attention primarily increased sensory sensitivity and shortened the time unrelated to decision making. Next, we measured centroparietal positivity (CPP), an EEG measure associated with decision making, and found that CPP latency was shorter in attended trials than in unattended trials. These results suggest that attention not only increases sensory sensitivity but also accelerates the initiation of decision making.
摘要：
人类可以选择性地处理信息并通过将注意力引导到日常生活中想要的位置来做出决定。大量研究表明，注意力提高了正确反应的速度，缩短了反应时间，据推测，这种现象是由注意力所指向的感觉信号的敏感性增加引起的。本研究采用了心理物理学方法和脑电图（EEG）来检验以下假设：注意力加速了信息积累的开始。要求参与者区分视野左右两侧显示的两个随机点运动学图之一的运动方向，在80%的试验中，其中一个是箭头提示的。将漂移扩散模型应用于有人值守和无人值守的视野中正确响应和反应时间的百分比。注意力主要增加了感觉敏感性，缩短了与决策无关的时间。接下来,我们测量了中心顶叶阳性(CPP)，与决策相关的脑电图测量，并发现参与试验的CPP潜伏期比无人参与试验短.这些结果表明，注意力不仅增加了感觉敏感性，而且加速了决策的开始。
