Abstract

A crucial component of locomotion and mobility is the successful navigation of apertures (e.g., doorways, lanes, corridors). While much research has studied perceptions of action capabilities in a static environment, far less work has considered how action capabilities change in a dynamic environment, particularly when the environment moves in unpredictable ways. The current experiment assessed actors’ perceptions of aperture passability for a dynamically moving gap. In an immersive virtual environment, participants were seated in a wheelchair rolling toward a sliding door while the door oscillated to various widths. The patterns of oscillation were manipulated in terms of their amplitude (sequence standard deviation), predictability (sequence sample entropy), and base width (sequence mean) in a within-participants design. Participants gave judgments of passability within a temporal occlusion paradigm. Results showed that both the amplitude and predictability of the oscillating door impacted the reliability of passability judgments. We suggest that these variables act to alter the salience of optical constraints (e.g., attractors and repellors) within a dynamical systems framework.

摘要

运动和机动性的重要组成部分是光圈（例如，门口，车道，走廊）的成功导航。尽管许多研究已经研究了在静态环境中对动作能力的看法，但很少有人考虑在动态环境中动作能力如何发生变化，特别是当环境以不可预测的方式运动时。当前的实验评估了演员对于动态移动间隙的光圈可通过性的感知。在身临其境的虚拟环境中，参与者坐在轮椅上，而轮椅则朝着滑动门滚动，同时门摆动到各种宽度。在参与者内部设计中，根据振幅（序列标准偏差），可预测性（序列样本熵）和碱基宽度（序列平均值）来控制振荡模式。参与者对时间遮挡范例中的可通过性做出了判断。结果表明，摆动门的幅度和可预测性都影响通过性判断的可靠性。我们建议这些变量用来改变动力学系统框架内光学约束（例如吸引子和排斥子）的显着性。