Time Courses of Attended and Ignored Object Representations.
Time Courses of Attended and Ignored Object Representations.
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DOI：
10.1162/jocn_a_01972
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发表时间：
2023-04-01
影响因子：
3.2
通讯作者：
Mangun, George R. R.
中科院分区：
文献类型：
--
作者：
Noah, Sean;Meyyappan, Sreenivasan;Ding, Mingzhou;Mangun, George R. R.
选择性注意会优先处理与行为目标相关的信息。以前的研究表明，注意到的视觉信息得到了更有效的处理和表征，但分散注意力的视觉信息并没有完全被抑制，而且可能还会继续在大脑中呈现。在自然视觉中，场景中可能同时存在关注对象和忽略对象。准确地了解视觉系统中的每一种表征，以及这些神经表征如何随着时间的推移而演变，仍然是认知神经科学的一个关键目标。在这项研究中，我们记录了参与者在执行基于物体的线索注意任务时的脑电，该任务涉及注意目标物体，忽略同时呈现的和空间重叠的分心物体。我们对刺激诱发的脑电数据进行支持向量机分类，分别跟踪目标表征和干扰表征的时间动力学。我们发现(1)目标和分心物体在物体处理的早期阶段(目标开始后约100毫秒至约200毫秒)都是可解码的，以及(2)两个对象的表征都随着时间的推移而维持，在~1000毫秒延迟之前保持高于机会的可解码。然而，(3)分心物体信息在大约300毫秒的延迟后开始显著褪色。这些发现提供了关于复杂场景知觉中注意和忽视视觉信息的命运的信息。
Selective attention prioritizes information that is relevant to behavioral goals. Previous studies have shown that attended visual information is processed and represented more efficiently, but distracting visual information is not fully suppressed, and may also continue to be represented in the brain. In natural vision, to-be-attended and to-be-ignored objects may be present simultaneously in the scene. Understanding precisely how each is represented in the visual system, and how these neural representations evolve over time, remains a key goal in cognitive neuroscience. In this study, we recorded EEG while participants performed a cued object-based attention task that involved attending to target objects and ignoring simultaneously presented and spatially overlapping distractor objects. We performed support vector machine classification on the stimulus-evoked EEG data to separately track the temporal dynamics of target and distractor representations. We found that (1) both target and distractor objects were decodable during the early phase of object processing (~100 msec to ~200 msec after target onset), and (2) the representations of both objects were sustained over time, remaining decodable above chance until ~1000 msec latency. However, (3) the distractor object information faded significantly beginning after about 300 msec latency. These findings provide information about the fate of attended and ignored visual information in complex scene perception.
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影响因子：
5.7
作者：
Bae GY;Luck SJ
通讯作者：
Luck SJ
影响因子：
16.2
作者：
Bosman CA;Schoffelen JM;Brunet N;Oostenveld R;Bastos AM;Womelsdorf T;Rubehn B;Stieglitz T;De Weerd P;Fries P
通讯作者：
Fries P
影响因子：
3.5
作者：
Won BY;Venkatesh A;Witkowski PP;Banh T;Geng JJ
通讯作者：
Geng JJ
DOI：
10.1073/pnas.1108491108
发表时间：
2011-10-04
影响因子：
11.1
作者：
Burge, Johannes;Geisler, Wilson S.
通讯作者：
Geisler, Wilson S.
影响因子：
5.3
作者：
Green, Jessica J.;Boehler, Carsten N.;Woldorff, Marty G.
通讯作者：
Woldorff, Marty G.