Evidence accumulation during perceptual decision-making is sensitive to the dynamics of attentional selection
Evidence accumulation during perceptual decision-making is sensitive to the dynamics of attentional selection
复制标题
感知决策过程中的证据积累对注意力选择的动态敏感
DOI：
10.1016/j.neuroimage.2020.117093
复制
发表时间：
2019
期刊：
影响因子：
5.7
通讯作者：
J. Mattingley
中科院分区：
文献类型：
--
作者：
Dragan Rangelov;J. Mattingley
选择和组合多个感官输入以支持准确决策的能力是适应行为的一个标志。通常需要注意力选择来优先处理与任务相关的刺激，而不是无关的、可能会分散注意力的刺激。到目前为止，大多数关于知觉决策的研究只利用了与任务相关的刺激，对注意力如何调节决策知之甚少。为了解决这个问题，我们开发了一种新的综合决策任务，在该任务中，参与者判断连续目标运动信号的平均方向，而忽略同时存在的和空间上重叠的分心运动信号。在两个不同的注意力选择作用的实验中，我们使用回归来量化目标和分心刺激对行为的影响。使用脑电图学，我们表征了决策、注意力选择以及对目标和分心信号的特定特征反应的神经关联。虽然目标强烈影响知觉决策和相关的神经活动，但我们也发现，同时存在的和空间上重合的分心因素对行为和大脑活动都产生了可测量的偏差。我们的发现表明，注意在知觉决策过程中作为一个实时但不完美的过滤器，通过动态调节与任务相关和无关的感觉输入的贡献来发挥作用。
The ability to select and combine multiple sensory inputs in support of accurate decisions is a hallmark of adaptive behaviour. Attentional selection is often needed to prioritize task-relevant stimuli relative to irrelevant, potentially distracting stimuli. As most studies of perceptual decision-making to date have made use of task-relevant stimuli only, relatively little is known about how attention modulates decision making. To address this issue, we developed a novel ‘integrated’ decision-making task, in which participants judged the average direction of successive target motion signals while ignoring concurrent and spatially overlapping distractor motion signals. In two experiments that varied the role of attentional selection, we used regression to quantify the influence of target and distractor stimuli on behaviour. Using electroencephalography, we characterised the neural correlates of decision making, attentional selection and feature-specific responses to target and distractor signals. While targets strongly influenced perceptual decisions and associated neural activity, we also found that concurrent and spatially coincident distractors exerted a measurable bias on both behaviour and brain activity. Our findings suggest that attention operates as a real-time but imperfect filter during perceptual decision-making by dynamically modulating the contributions of task-relevant and irrelevant sensory inputs.
影响因子：
11.4
作者：
J. Loewenthal
通讯作者：
J. Loewenthal