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Illusory Tactile Motion Perception: An Analog of the Visual Filehne Illusion

机译:虚幻的触觉运动感知:视觉文件幻觉的类比

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摘要

We continually move our body and our eyes when exploring the world, causing our sensory surfaces, the skin and the retina, to move relative to external objects. In order to estimate object motion consistently, an ideal observer would transform estimates of motion acquired from the sensory surface into fixed, world-centered estimates, by taking the motion of the sensor into account. This ability is referred to as spatial constancy. Human vision does not follow this rule strictly and is therefore subject to perceptual illusions during eye movements, where immobile objects can appear to move. Here, we investigated whether one of these, the Filehne illusion, had a counterpart in touch. To this end, observers estimated the movement of a surface from tactile slip, with a moving or with a stationary finger. We found the perceived movement of the surface to be biased if the surface was sensed while moving. This effect exemplifies a failure of spatial constancy that is similar to the Filehne illusion in vision. We quantified this illusion by using a Bayesian model with a prior for stationarity, applied previously in vision. The analogy between vision and touch points to a modality-independent solution to the spatial constancy problem.
机译:在探索世界时,我们不断地移动我们的身体和眼睛,导致我们的感觉表面,皮肤和视网膜相对于外部物体移动。为了一致地估计物体的运动,理想的观察者将考虑到传感器的运动,将从感官表面获取的运动的估计转换成固定的,以世界为中心的估计。此功能称为空间恒定性。人类的视觉并不严格遵循此规则,因此在眼睛运动期间会受到感知上的错觉,其中无法移动的物体可能会移动。在这里,我们调查了其中之一Filehne幻觉是否与对方有联系。为此,观察者用移动的或静止的手指通过触觉滑动来估计表面的运动。我们发现,如果在移动时感觉到表面,则感觉到的表面运动会产生偏差。这种效果说明了与视觉中的Filehne错觉相似的空间恒定性失败。我们通过使用先前用于视觉的平稳性的贝叶斯模型对这种错觉进行了量化。视觉和接触点之间的类比指向空间恒定性问题的模态无关解决方案。

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