Object motion continuity and the flash-lag effect
Object motion continuity and the flash-lag effect
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物体运动连续性和闪光滞后效应
DOI：
10.1016/j.visres.2013.08.009
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发表时间：
2013
期刊：
影响因子：
1.8
通讯作者：
and Watanabe K
中科院分区：
文献类型：
--
作者：
Au RKC;and Watanabe K
当视觉对象短暂闪烁时，它似乎落后于另一个移动对象（闪光滞后效应；FLE）。先前的研究表明，在闪光演示时移动物体的突然变化会消除 FLE。我们检查了当突然的颜色变化嵌入到移动物体上的一系列颜色交替中时，FLE 是否会被消除。观察者观察一个移动的圆盘，其颜色根本没有变化，仅在另一个静止物体闪烁时改变一次，或者在闪烁呈现之前在移动时在两种颜色之间定期（实验1）或随机（实验2）交替。尽管与无变化条件相比，幅度有所减小，但在运动过程中改变颜色的运动物体观察到的 FLE 明显强于单变化条件下。在实验3中，物体颜色在两种颜色之间交替，但当闪光出现时却意外地变成了一种新颜色。在这种条件下 FLE 的消除与一次性变化条件相当，这表明意外的变化恢复了运动物体在闪光呈现时的显着性，从而使观察者免于感知到 FLE。我们提出，在没有意外事件的情况下，运动物体表面特征的快速变化部分地降低了物体文件的维护，但这并不妨碍视觉系统记录运动流中仅一个物体的存在。
When a visual object is briefly flashed, it appears to lag behind another moving object (flash-lag effect; FLE). Previous studies showed that a sudden change to the moving object at the time of the flash presentation would eliminate the FLE. We examined whether the FLE would be eliminated when a sudden color change was embedded in a sequence of color alternations on a moving object. Observers viewed a moving disc, the color of which did not change at all, changed only once when another stationary object flashed, or alternated regularly (Experiment 1) or randomly (Experiment 2) between two colors as it was moving before the flash presentation. Although the magnitude was reduced compared with the no-change condition, the FLE observed with the moving object that changed color during motion was significantly stronger than that in the one-change condition. In Experiment 3, the object color alternated between two but unexpectedly changed to a new color when the flash appeared. The elimination of FLE in such condition was comparable to the one-change condition, suggesting that the unexpected change restored the salience of the moving object at the time of flash presentation, which spared the observer from perceiving the FLE. We propose that, without an unexpected event, rapid changes in the surface feature of the moving object partially degrade the maintenance of object file, but this does not preclude the visual system in registering the existence of only one object in the motion stream.