Hogendoorn Hinze, Verstraten Frans A J, MacDougall Hamish, Alais David
Helmholtz Institute, Department of Experimental Psychology, Utrecht University, The Netherlands; School of Psychology, The University of Sydney, NSW 2006, Australia.
Helmholtz Institute, Department of Experimental Psychology, Utrecht University, The Netherlands; School of Psychology, The University of Sydney, NSW 2006, Australia.
Vision Res. 2017 Jan;130:22-30. doi: 10.1016/j.visres.2016.11.002. Epub 2016 Nov 25.
Certain visual stimuli can have two possible interpretations. These perceptual interpretations may alternate stochastically, a phenomenon known as bistability. Some classes of bistable stimuli, including binocular rivalry, are sensitive to bias from input through other modalities, such as sound and touch. Here, we address the question whether bistable visual motion stimuli, known as plaids, are affected by vestibular input that is caused by self-motion. In Experiment 1, we show that a vestibular self-motion signal biases the interpretation of the bistable plaid, increasing or decreasing the likelihood of the plaid being perceived as globally coherent or transparently sliding depending on the relationship between self-motion and global visual motion directions. In Experiment 2, we find that when the vestibular direction is orthogonal to the visual direction, the vestibular self-motion signal also biases the direction of one-dimensional motion. This interaction suggests that the effect in Experiment 1 is due to the self-motion vector adding to the visual motion vectors. Together, this demonstrates that the perception of visual motion direction can be systematically affected by concurrent but uninformative and task-irrelevant vestibular input caused by self-motion.
某些视觉刺激可能有两种可能的解释。这些感知解释可能会随机交替，这种现象被称为双稳态。某些类型的双稳态刺激，包括双眼竞争，对来自其他感觉模态（如声音和触觉）的输入偏差敏感。在这里，我们探讨一个问题，即被称为方格图案的双稳态视觉运动刺激是否会受到自我运动引起的前庭输入的影响。在实验1中，我们表明前庭自我运动信号会使双稳态方格图案的解释产生偏差，根据自我运动和全局视觉运动方向之间的关系，增加或降低方格图案被感知为全局连贯或透明滑动的可能性。在实验2中，我们发现当前庭方向与视觉方向正交时，前庭自我运动信号也会使一维运动的方向产生偏差。这种相互作用表明实验1中的效应是由于自我运动向量与视觉运动向量相加所致。总之，这表明视觉运动方向的感知会受到自我运动引起的同时存在但无信息且与任务无关的前庭输入的系统性影响。
