Kim Juno, Palmisano Stephen, Bonato Frederick
School of Psychology, University of Wollongong, Wollongong, NSW 2522, Australia.
Perception. 2012;41(4):402-14. doi: 10.1068/p6919.
Research has shown that adding simulated linear head oscillation to radial optic flow displays enhances the illusion of self-motion in depth (ie linear vection). We examined whether this oscillation advantage for vection was due to either the added motion parallax or retinal slip generated by insufficient compensatory eye movement during display oscillation. We constructed radial flow displays which simulated 1 Hz horizontal linear head oscillation (generates motion parallax) or angular head oscillation in yaw (generates no motion parallax). We found that adding simulated angular or linear head oscillation to radial flow increased the strength of linear vection in depth. Neither type of simulated head oscillation significantly reduced vection onset latencies relative to pure radial flow. Simultaneous eye-movement recordings showed that slow-phase ocular following responses (OFRs) were induced in both linear and angular viewpoint oscillation conditions. Vection strength was significantly reduced by active central fixation when viewing displays which simulated angular, but not linear, head oscillation. When these displays with angular oscillation were viewed without stable fixation, vection strength was found to increase with the velocity and regularity of the OFR. We conclude that vection improvements observed during central viewing of displays with angular viewpoint oscillation depend on the generation of eye movements.
研究表明，在径向光流显示中添加模拟线性头部振荡可增强深度上的自我运动错觉（即线性运动错觉）。我们研究了这种振荡对运动错觉的优势是否归因于显示振荡期间由于补偿性眼球运动不足而产生的附加运动视差或视网膜像移。我们构建了径向流显示，模拟了1Hz的水平线性头部振荡（产生运动视差）或偏航方向的角向头部振荡（不产生运动视差）。我们发现，向径向流中添加模拟角向或线性头部振荡会增加深度上线性运动错觉的强度。相对于纯径向流，两种类型的模拟头部振荡均未显著缩短运动错觉的起始潜伏期。同步眼球运动记录显示，在直线和角向视点振荡条件下均诱发了慢相眼球跟随反应（OFRs）。当观看模拟角向而非线性头部振荡的显示时，主动中央注视会显著降低运动错觉强度。当在没有稳定注视的情况下观看这些具有角向振荡的显示时，发现运动错觉强度会随着OFR的速度和规律性而增加。我们得出结论，在中央观看具有角向视点振荡的显示时观察到的运动错觉改善取决于眼球运动的产生。
