Kim Juno, Palmisano Stephen
School of Psychology, Faculty of Health and Behavioural Sciences, University of Wollongong, Wollongong, NSW, Australia.
J Vis. 2010 Oct 1;10(12):7. doi: 10.1167/10.12.7.
This study examined the role of eccentric gaze dynamics in the generation of visual illusions of self-motion (i.e., vection). In Experiment 1, observers maintained their gaze either upward, downward, leftward, or rightward with respect to the center of a radially expanding optic flow pattern, which simulated forward self-motion in depth through a 3D cloud of objects. Real-time vection strength ratings and changes in horizontal and vertical eye positions were recorded simultaneously. Vection strength was found to increase progressively over the course of each 30-s presentation of radial flow. Eye tracking revealed strong optokinetic responses, consistent with ocular following responses (OFRs). Reported increases in vection strength in all four gaze conditions were typically preceded by reductions in slow-phase eye velocity. Similar results were found in Experiment 2, where displays simulated self-motion over a ground plane, which provided superior perspective. We conclude in both cases that enhancements of vection strength over time were temporally contingent upon the changing character of OFR while viewing these displays.
本研究考察了偏心注视动态在自我运动视觉错觉（即动感）产生中的作用。在实验1中，观察者相对于径向扩展的光流模式中心，将目光保持向上、向下、向左或向右，该光流模式通过三维物体云模拟了深度上的向前自我运动。同时记录实时动感强度评分以及水平和垂直眼位的变化。发现在每次30秒的径向流呈现过程中，动感强度逐渐增加。眼动追踪显示出强烈的视动反应，与眼跟随反应（OFRs）一致。在所有四种注视条件下，报告的动感强度增加通常之前是慢相眼速的降低。在实验2中也发现了类似结果，其中显示器模拟了在地平面上的自我运动，这提供了更好的视角。我们在这两种情况下都得出结论，在观看这些显示器时，随着时间的推移，动感强度的增强在时间上取决于OFR的变化特征。
