Feature-based attention involuntarily and simultaneously improves visual performance across locations.
Feature-based attention involuntarily and simultaneously improves visual performance across locations.
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DOI：
10.1167/11.6.15
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发表时间：
2011-05-20
影响因子：
1.8
通讯作者：
Carrasco M
中科院分区：
文献类型：
--
作者：
White AL;Carrasco M
选择性注意可以选择性地增加对特定视觉特征的敏感性，以便优先考虑行为相关的刺激。此外，即使在被忽略的位置，对关注特征值的神经反应也会增强。我们为这种“基于全局特征的注意力对视觉表现的非自愿和同时影响提供了行为证据。观察者被提示注意在一个位置沿特定方向移动的点（主要任务），同时区分屏幕另一侧的两组移动点中哪一组包含连贯运动（次要任务）。一个类似的实验测试了对方向的选择性注意。次要任务不需要观察者区分或选择性地注意存在的特定特征值。尽管如此，当方向或方向发生时，敏感度最高。通过将表现与中性条件进行比较，我们发现，参与特征值的增强比其他特征值的抑制更多。
Selective attention can selectively increase sensitivity to particular visual features in order to prioritize behaviorally relevant stimuli. Moreover, neural responses to attended feature values are boosted even at ignored locations. We provide behavioral evidence for involuntary and simultaneous effects of this “globalfeature-based attention on visual performance. Observers were cued to attend to dots moving in a particular direction at one location (the primary task), while discriminating which of two groups of moving dots on the other side of the screen contained coherent motion (the secondary task). An analogous experiment tested selective attention to orientation. The secondary tasks did not require observers to discriminate or selectively attend to the particular feature values present. Nonetheless, sensitivity was highest when the direction or orientation happened to match the one cued in the primary task. By comparing performance to a neutral condition, we revealed more enhancement of attended feature values than suppression of others.
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