Behavioral dynamics of steering, obstacle avoidance, and route selection

Journal of Experimental Psychology. Human Perception and Performance
Brett R Fajen, William H Warren

Abstract

The authors investigated the dynamics of steering and obstacle avoidance, with the aim of predicting routes through complex scenes. Participants walked in a virtual environment toward a goal (Experiment 1) and around an obstacle (Experiment 2) whose initial angle and distance varied. Goals and obstacles behave as attractors and repellers of heading, respectively, whose strengths depend on distance. The observed behavior was modeled as a dynamical system in which angular acceleration is a function of goal and obstacle angle and distance. By linearly combining terms for goals and obstacles, one could predict whether participants adopt a route to the left or right of an obstacle to reach a go (Experiment 3). Route selection may emerge from on-line steering dynamics, making explicit path planning unnecessary.

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Citations

Feb 3, 2007·Experimental Brain Research·Brett R Fajen, William H Warren
Mar 7, 2008·Experimental Brain Research·Daniel S Marigold, Aftab E Patla
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