Dissociating oculomotor contributions to spatial and feature-based selection
Dissociating oculomotor contributions to spatial and feature-based selection
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DOI：
10.1152/jn.00275.2013
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发表时间：
2013-10-01
影响因子：
2.5
通讯作者：
Theeuwes, Jan
中科院分区：
文献类型：
--
作者：
Jonikaitis, Donatas;Theeuwes, Jan
眼跳不仅提供视觉感知所需的高分辨率视网膜图像，而且与眼跳目标选择相关的处理阶段甚至在眼球运动开始之前就会影响视觉感知。这些扫视前效应被认为产生于两种视觉选择机制：增强扫视目标位置处理的空间选择和增强扫视目标特征处理的基于特征的选择。通过测量眼球运动表现和知觉辨别力，我们确定了哪些选择机制与眼跳准备有关。我们在眼跳准备过程中观察到了基于特征的选择和基于空间的选择，但发现基于特征的选择与眼跳的启动无关，也不受同时观察到的空间选择的重新分布的影响。我们得出结论，动眼神经选择只以一种空间的、非特定特征的方式偏向视觉选择。
Saccades not only deliver the high-resolution retinal image requisite for visual perception, but processing stages associated with saccade target selection affect visual perception even before the eye movement starts. These presaccadic effects are thought to arise from two visual selection mechanisms: spatial selection that enhances processing of the saccade target location and feature-based selection that enhances processing of the saccade target features. By measuring oculomotor performance and perceptual discrimination, we determined which selection mechanisms are associated with saccade preparation. We observed both feature-based and space-based selection during saccade preparation but found that feature-based selection was neither related to saccade initiation nor was it affected by simultaneously observed redistribution of spatial selection. We conclude that oculomotor selection biases visual selection only in a spatial, feature-unspecific manner.