Extraretinal and retinal amplitude and phase errors during Filehne illusion and path perception
Extraretinal and retinal amplitude and phase errors during Filehne illusion and path perception
复制标题
DOI：
10.3758/bf03212076
复制
发表时间：
2000-07-01
期刊：
影响因子：
--
通讯作者：
Crowell, JA
中科院分区：
文献类型：
--
作者：
Freeman, TCA;Banks, MS;Crowell, JA
追踪眼球运动引起视网膜运动。为了判断刺激相对于头部的运动，视觉系统必须通过使用视网膜外的眼速信号来校正眼运动。这种校正在各种运动估计任务中是重要的，包括相对于头部的对象运动的判断和来自光流的自运动方向的判断。Filehne错觉（一个静止的物体似乎与追踪的方向相反）是由视网膜和视网膜外速度估计之间的不匹配造成的。也可能存在时间上的不匹配。速度和定时误差进行了研究，使用正弦追求眼球运动。我们描述了一种新的错觉障碍错觉，其中自我运动的感知方向左右摆动时，眼睛正弦运动。提出了一个线性模型，确定的增益比和相位差的视网膜外和视网膜信号伴随的Filehne和障碍错觉。在Filehne和自运动的情况下，使用运动归零程序测量速度失配和定时差。时间误差是非常小的Filehne和障碍赛的幻想。然而，视网膜外与视网膜增益的比值始终小于1，因此这两种错觉都是视网膜和视网膜外速度估计值不匹配的结果。恢复的自我运动的方向在追求眼球运动的结果的相关性进行了讨论。
Pursuit eye movements give rise to retinal motion. To judge stimulus motion relative to the head, the visual system must correct for the eye movement by using an extraretinal, eye-velocity signal. Such correction is important in a variety of motion estimation tasks including judgments of object motion relative to the head and judgments of self-motion direction from optic flow. The Filehne illusion (where a stationary object appears to move opposite to the pursuit) results from a mismatch between retinal and extraretinal speed estimates. A mismatch in timing could also exist. Speed and timing errors were investigated using sinusoidal pursuit eye movements. We describe a new illusion-the slalom illusion-in which the perceived direction of self-motion oscillates left and right when the eyes move sinusoidally. A linear model is presented that determines the gain ratio and phase difference of extraretinal and retinal signals accompanying the Filehne and slalom illusions. The speed mismatch and timing differences were measured in the Filehne and self-motion situations using a motion-nulling procedure. Timing errors were very small for the Filehne and slalom illusions. However, the ratios of extraretinal to retinal gain were consistently less than 1, so both illusions are the consequence of a mismatch between estimates of retinal and extraretinal speed. The relevance of the results for recovering the direction of self-motion during pursuit eye movements is discussed.