Immediate post-saccadic information mediates space constancy
Immediate post-saccadic information mediates space constancy
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DOI：
10.1016/s0042-6989(98)00048-0
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发表时间：
1998-10-01
期刊：
影响因子：
1.8
通讯作者：
Schneider, WX
中科院分区：
文献类型：
--
作者：
Deubel, H;Bridgeman, B;Schneider, WX
我们最近证明，眼跳期间移位的视觉目标的感知稳定性关键取决于眼跳结束时目标是否立即出现；在扫视期间和之后对目标进行消隐使其扫视内位移更加明显（Deubel er al. Vis Res 1996；36:985-996）。在这里，我们研究视觉背景和空白的相互作用。受试者看到一个扫视目标和一个相同大小的干扰物。在扫视期间，其中一个向左或向右移位。与此同时，其中一个物体可能会短暂消失。受试者报告目标或干扰物是否跳跃。被遮蔽的物体更常被视为跳跃（实验 1），无论哪个物体真正跳跃，这意味着连续可见的物体优先被视为稳定的。当两个物体都被遮蔽时，较长的遮蔽时间可以更准确地识别在扫视期间哪个物体发生了跳跃。当一个物体被跳跃而另一个静止物体被遮蔽时（实验 2），被遮蔽的物体被错误地视为跳跃，直到跳跃覆盖了扫视幅度的 50% 或更多。在实验 3 中，一个大的连续存在的纹理在扫视期间经历了未被检测到的跳跃，从而对空白目标的同时跳跃的判断产生了偏差。结果表明，正常情况下的空间恒定性取决于连续存在的模式是稳定的假设——该模式成为扫视后感知空间重新校准的空间参考。 (C) 1998 Elsevier Science Ltd. 保留所有权利。
We recently demonstrated that the perceived stability of a visual target that is displaced during a saccade critically depends on whether the target is present immediately when the saccade ends; blanking a target during and just after a saccade makes its intra-saccadic displacement more visible (Deubel er al. Vis Res 1996;36:985-996). Here, we investigate the interaction of visual context and blanking. Subjects saw a saccade target and an equal-sized distracter. During a saccade one or the other was displaced left or right. At the same time, one of the objects could be blanked briefly. Subjects reported whether the target or the distracter had jumped. The object that was blanked was more often seen as jumping (Experiment 1), regardless of which object really jumped, implying that continuously visible objects are preferentially perceived as stable. When both objects were blanked, longer blanking led to better accuracy at identifying which had jumped during a saccade. When one object was jumped and the other, stationary object was blanked (Experiment 2), the blanked object was mistakenly seen as jumping until the jump covered 50% or more of the saccade amplitude. In Experiment 3 a large continuously present texture underwent an undetected jump during a saccade, biasing judgments of simultaneous jumps of a blanked target. The results demonstrate that space constancy in normal situations is dominated by the assumption that a continuously present pattern is stable-this pattern becomes the spatial reference for the post-saccadic recalibration of perceptual space. (C) 1998 Elsevier Science Ltd. All rights reserved.