Psychology Department, University of British Columbia Okanagan, 3333 University Way, Kelowna, BC, Canada V1V 1V7.
Brain Res. 2010 Apr 6;1323:127-38. doi: 10.1016/j.brainres.2010.01.061. Epub 2010 Feb 2.
Past research indicates that observers rely strongly on flow-based and object-based motion information for determining egomotion or direction of heading. More recently, it has been shown that they also rely on displacement information that does not induce motion perception. As yet, little is known regarding the specific displacement cues that are used for heading estimation. In Experiment 1a, we show that the accuracy of heading estimates increases, as more displacement cues are available. In Experiments 1b and 2, we show that observers rely mostly on the displacement of objects and geometric cues for estimating heading. In Experiment 3, we show that the accuracy of detecting changes in heading when displacement cues are used is low. The results are interpreted in terms of two systems that may be available for estimating heading, one relying on movement information and providing navigational mechanisms, the other relying on displacement information and providing navigational planning and orienting mechanisms.
过去的研究表明，观察者主要依赖基于流和基于物体的运动信息来确定自身运动或朝向方向。最近，已经证明他们也依赖于不会引起运动感知的位移信息。然而，对于用于航向估计的具体位移线索，人们知之甚少。在实验 1a 中，我们表明，随着可用的位移线索增加，航向估计的准确性会提高。在实验 1b 和 2 中，我们表明观察者主要依赖物体的位移和几何线索来估计航向。在实验 3 中，我们表明，当使用位移线索时，检测航向变化的准确性较低。结果从可能用于估计航向的两个系统进行解释，一个依赖于运动信息并提供导航机制，另一个依赖于位移信息并提供导航规划和定向机制。
