Zhang Lei, Mou Weimin
Department of Psychology, University of Alberta.
J Exp Psychol Learn Mem Cogn. 2017 Mar;43(3):472-491. doi: 10.1037/xlm0000324. Epub 2016 Sep 26.
During locomotion, individuals can determine their positions with either idiothetic cues from movement (path integration systems) or visual landmarks (piloting systems). This project investigated how these 2 systems interact in determining humans' positions. In 2 experiments, participants studied the locations of 5 target objects and 1 single landmark. They walked a path after the targets and the landmark had been removed and then replaced the targets at the end of the path. Participants' position estimations were calculated based on the replaced targets' locations (Mou & Zhang, 2014). In Experiment 1, participants walked a 2-leg path. The landmark reappeared in a different location during or after walking the second leg. The results showed that participants' position estimations followed idiothetic cues in the former case, but the displaced landmark in the latter case. In Experiment 2, participants saw the displaced landmark when they reached the end of the second leg and then walked a third leg without the view of the landmark. Participants were asked or not to point to 1 of the targets before they walked the third leg. The results showed that the initial position of the third leg was still influenced by the displaced landmark in the former case, but was determined by idiothetic cues in the latter case. These results suggest that the path integration system works dynamically and the piloting system resets the path integration system when people judge their positions in the presence of conflicting piloting cues. (PsycINFO Database Record
在移动过程中，个体可以通过运动产生的自身运动线索（路径整合系统）或视觉地标（导航系统）来确定自己的位置。本项目研究了这两种系统在确定人类位置时是如何相互作用的。在两个实验中，参与者研究了5个目标物体和1个单一地标的位置。在目标物体和地标被移除后，他们沿着一条路径行走，然后在路径终点重新放置目标物体。根据重新放置的目标物体的位置计算参与者的位置估计值（Mou & Zhang，2014）。在实验1中，参与者走了一条由两段组成的路径。地标在走第二段路的过程中或之后出现在不同的位置。结果表明，在前一种情况下，参与者的位置估计遵循自身运动线索，而在后一种情况下则遵循移位后的地标。在实验2中，参与者在到达第二段路的终点时看到了移位后的地标，然后在没有看到地标的情况下走第三段路。在走第三段路之前，参与者被要求或不被要求指向其中一个目标物体。结果表明，在前一种情况下，第三段路的起始位置仍然受到移位后的地标的影响，而在后一种情况下则由自身运动线索决定。这些结果表明，路径整合系统是动态工作的，当人们在存在冲突的导航线索的情况下判断自己的位置时，导航系统会重置路径整合系统。（PsycINFO数据库记录）
