AN ACCELERATION ILLUSION CAUSED BY UNDERESTIMATION OF STIMULUS VELOCITY DURING PURSUIT EYE-MOVEMENTS - AUBERT-FLEISCHL REVISITED
AN ACCELERATION ILLUSION CAUSED BY UNDERESTIMATION OF STIMULUS VELOCITY DURING PURSUIT EYE-MOVEMENTS - AUBERT-FLEISCHL REVISITED
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DOI：
10.1068/p190471
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发表时间：
1990-01-01
期刊：
影响因子：
1.7
通讯作者：
VANGELDER, P
中科院分区：
文献类型：
--
作者：
WERTHEIM, AH;VANGELDER, P
当眼睛追求扫过移动背景图案的注视点，并且注视点突然停止时，背景图案的持续运动似乎加速到更高的速度。实验I表明，这种加速度错觉不是由（i）背景和注视点之间的相对速度，（ii）背景图案的视网膜图像的速度，或（iii）实验所用CRT屏幕边缘的视网膜图像的运动的突然变化引起的。在实验II中，错觉的大小被量化。当背景和眼睛向同一方向移动时，它是最强的。当它们以相反的方向移动时，背景速度越高，它就变得不那么明显（甚至消失）。研究结果解释的第一作者提出的模型，其中的感知对象的运动和速度来自视网膜滑移速度信息和大脑的“估计”的眼睛在空间中的速度之间的相互作用。它们说明了经典的奥伯特-弗莱舍现象（当用眼睛追踪时，刺激物似乎比在静止的眼睛面前移动时移动得更慢）是更普遍现象的特殊情况：每当我们进行追踪眼球运动时，我们低估了我们视野中所有刺激物的速度，这些刺激物恰好与我们的眼睛在同一方向上移动，或者在与我们的眼睛相反的方向上缓慢移动。
When the eyes pursue a fixation point that sweeps across a moving background pattern, and the fixation point is suddenly made to stop, the ongoing motion of the back-ground pattern seems to accelerate to a higher velocity. Experiment I showed that this acceleration illusion is not caused by the sudden change in (i) the relative velocity between background and fixation point, (ii) the velocity of the retinal image of the background pattern, or (iii) the motion of the retinal image of the rims of the CRT screen on which the experiment was carried out. In experiment II the magnitude of the illusion was quantified. It is strongest when background and eyes move in the same direction. When they move in opposite directions it becomes less pronounced (and may disappear) with higher background velocities. The findings are explained in terms of a model proposed by the first author, in which the perception of object motion and velocity derives from the interaction between retinal slip velocity information and the brain's 'estimate' of eye velocity in space. They illustrate that the classic Aubert-Fleischl phenomenon (a stimulus seems to be moving slower when pursued with the eyes than when moving in front of stationary eyes) is a special case of a more general phenomenon: whenever we make a pursuit eye movement we underestimate the velocity of all stimuli in our visual field which happen to move in the same direction as our eyes, or which move slowly in the direction opposite to our eyes.