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Visuomotor Tracking Tasks With Delayed Pursuit and Escape

[+] Author Affiliations
John Milton, Toru Ohira

The Claremont Colleges, Claremont, CA

Joshua Lippai

Pomona College, Claremont, CA

Rachel Bellows

Pitzer College, Claremont, CA

Andrew Blomberg

Claremont McKenna College, Claremont, CA

Atsushi Kamimura

The University of Tokyo, Tokyo, Japan

Paper No. DETC2011-47312, pp. 419-425; 7 pages
doi:10.1115/DETC2011-47312
From:
  • ASME 2011 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 4: 8th International Conference on Multibody Systems, Nonlinear Dynamics, and Control, Parts A and B
  • Washington, DC, USA, August 28–31, 2011
  • Conference Sponsors: Design Engineering Division and Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5481-5
  • Copyright © 2011 by ASME

abstract

Virtual stick balancing (VSB) is a manual visuomotor tracking task that involves interplay between a human and a computer in which the movements are programmed to resemble those of balancing a stick at the fingertip. Since time delays and random perturbations (“noise”) are intrinsic properties of this task, we modeled VSB as a delayed pursuit-escape process: the target movements are described by a simple random walk and those movements controlled by the computer mouse by a delayed random walk biased towards the target. As subjects become more skilled, a stereotyped and recurring pursuit-escape pattern develops in which the mouse pursues the target until it overtakes it, causing the target to move in a different direction, followed, after a lag, by the pursing mouse. The delayed pursuit-escape random walk model captured the qualitative nature of this tracking task and provided insights into why this tracking task always fails at some point in time, even for the most expert subjects.

Copyright © 2011 by ASME

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