Kearns Melissa J, Warren William H, Duchon Andrew P, Tarr Michael J
Cognitive and Linguistic Sciences Department, Brown University, Providence, RI 02906, USA.
Perception. 2002;31(3):349-74. doi: 10.1068/p3311.
We examined the roles of information from optic flow and body senses (eg vestibular and proprioceptive information) for path integration, using a triangle completion task in a virtual environment. In two experiments, the contribution of optic flow was isolated by using a joystick control. Five circular arenas were used for testing: (B) both floor and wall texture; (F) floor texture only, reducing information for rotation; (W) wall texture only, reducing information for translation; (N) a no texture control condition, and (P) an array of posts. The results indicate that humans can use optic flow for path integration and are differentially influenced by rotational and translational flow. In a third experiment, participants actively walked in arenas B, F, and N, so body senses were also available. Performance shifted from a pattern of underturning to overturning and exhibited decreased variability, similar responses with and without optic flow, and no attrition. The results indicate that path integration can be performed by integrating optic flow, but when information from body senses is available it appears to dominate.
我们利用虚拟环境中的三角形完成任务，研究了视觉流信息和身体感觉信息（如前庭和本体感觉信息）在路径整合中的作用。在两个实验中，通过使用操纵杆控制来分离视觉流的贡献。使用了五个圆形场地进行测试：（B）地面和墙壁都有纹理；（F）只有地面纹理，减少旋转信息；（W）只有墙壁纹理，减少平移信息；（N）无纹理控制条件，以及（P）一排柱子。结果表明，人类可以利用视觉流进行路径整合，并且受到旋转流和平移流的不同影响。在第三个实验中，参与者在场地B、F和N中主动行走，因此身体感觉也可用。表现从转向不足转变为转向过度，并且变异性降低，有无视觉流时的反应相似，且没有损耗。结果表明，路径整合可以通过整合视觉流来执行，但当有来自身体感觉的信息时，它似乎占主导地位。
