Alive and grasping: Stable and rapid semantic access to an object category but not object graspability
Alive and grasping: Stable and rapid semantic access to an object category but not object graspability
复制标题
DOI：
10.1016/j.neuroimage.2013.03.058
复制
发表时间：
2013-08-15
期刊：
影响因子：
5.7
通讯作者：
Kutas, Marta
中科院分区：
文献类型：
--
作者：
Amsel, Ben D.;Urbach, Thomas P.;Kutas, Marta
在视觉词语感知之后，不同种类的概念性知识能以多快的速度获得？解决这个问题将为视觉词识别和语义记忆使用的神经和计算理论提供信息。我们使用事件相关脑电位（erp）测量了在go/nogo任务期间的实时脑活动，以确定必须访问的类别相关知识（活的/非活的）和行动相关知识（可掌握的/不可掌握的）的上限，从而影响下游决策过程。我们发现，在刺激开始后160毫秒，决策过程可以受到活体/非活体区分的影响，而在300毫秒之前，关于（单手）可抓性的信息是不可获得的。我们还提供了证据，证明所有项目都能快速获取与类别相关的知识，而不仅仅是活的、非活的、可掌握的或不可掌握的项目的子集，而且所有参与者都能快速获取与类别相关的知识，无论他们的反应速度如何。相比之下，N200 nogo效应的延迟对决策速度敏感。我们提出了语义获取和后续决策过程的神经机制的初步假设。(C) 2013爱思唯尔公司版权所有。
How quickly do different kinds of conceptual knowledge become available following visual word perception? Resolving this question will inform neural and computational theories of visual word recognition and semantic memory use. We measured real-time brain activity using event-related brain potentials (ERPs) during a go/nogo task to determine the upper limit by which category-related knowledge (living/nonliving) and action-related knowledge (graspable/ungraspable) must have been accessed to influence a downstream decision process. We find that decision processes can be influenced by the living/nonliving distinction by 160 ms after stimulus onset whereas information about (one-hand) graspability is not available before 300 ms. We also provide evidence that rapid access to category-related knowledge occurs for all items, not just a subset of living, nonliving, graspable, or ungraspable ones, and for all participants regardless of their response speed. The latency of the N200 nogo effect by contrast is sensitive to decision speed. We propose a tentative hypothesis of the neural mechanisms underlying semantic access and a subsequent decision process. (C) 2013 Elsevier Inc. All rights reserved.