Wallis Guy
Perception and Motor Systems Laboratory, Connell Building, University of Queensland, Qld 4072, Australia.
Vision Res. 2006 Sep;46(18):2848-58. doi: 10.1016/j.visres.2006.01.037. Epub 2006 Apr 27.
High-fidelity eye tracking is combined with a perceptual grouping task to provide insight into the likely mechanisms underlying the compensation of retinal image motion caused by movement of the eyes. The experiments describe the covert detection of minute temporal and spatial offsets incorporated into a test stimulus. Analysis of eye motion on individual trials indicates that the temporal offset sensitivity is actually due to motion of the eye inducing artificial spatial offsets in the briefly presented stimuli. The results have strong implications for two popular models of compensation for fixational eye movements, namely efference copy and image-based models. If an efference copy model is assumed, the results place constraints on the spatial accuracy and source of compensation. If an image-based model is assumed then limitations are placed on the integration time window over which motion estimates are calculated.
高保真眼动追踪与感知分组任务相结合，以深入了解眼睛运动引起的视网膜图像运动补偿背后可能的机制。实验描述了对纳入测试刺激中的微小时间和空间偏移的隐蔽检测。对单个试验中的眼动分析表明，时间偏移敏感性实际上是由于眼睛运动在短暂呈现的刺激中诱发了人为的空间偏移。这些结果对两种流行的注视性眼动补偿模型，即传出副本模型和基于图像的模型，具有重要意义。如果假设是传出副本模型，结果对补偿的空间精度和来源施加了限制。如果假设是基于图像的模型，那么对计算运动估计的积分时间窗口就有了限制。
