The Difficulty of Remotely Negotiating Corners

Abstract

Remote navigation, popular in computer games and prevalent in areas such as clinical medicine and teleoperations of robots and drones, uses human-computer interfaces for control. Usability studies of remote navigation interfaces require good metrics for evaluating interfaces, assessing users' capabilities, and determining the difficulty of the navigational task. We studied the time proficient users took to navigate virtual hovercrafts through virtual hallways with corners of various widths and discovered that the time to negotiate corners is inversely proportional to corner width. We derive and evaluate two models for the index of difficulty for negotiating corners. Both models fit the data well, with r² greater than 0.85 for the mean time to negotiate corners verses corner width.

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References

Accot

Zhai

, (1997). Beyond Fitts' Law: Models for Trajectory-Based HCI Tasks, Proceedings of CHI 97 Conference on Human Factors en Computing Systems, 295–304.

Brillouin

, (1962). Science and Information Theory, second edition, Academic Press Inc., New York, NY, 1962.

BBC News, (2005). US plans ‘srobot troops’ for Iraq, January 23, 2005, at: http://news.bbc.co.uk/2/hi/americas/4199935.stm

DARPA, (2006), DARPA Grand Challenge, downloaded January 6, 2006, at: http://www.darpa.mil/grandchallenge/overview.asp

Dario

Carrozza

Pietrabissa

, (1999). Development and In Vitro Testing of a Miniature Robotic System for Computer-Assisted Colonoscopy, Computer Aided Surgery 4, 1–14.

Fitts

P. M.

(1954). The Information Capacity of the Human Motor System in Controlling the Amplitude of Movement, Quarterly Journal of Psychology 47, 381–391.

Looser

Cockburn

Savage

(2005). On the Validity of Using First-Person Shooters for Fitts' Law Studies, Proceedings of People and Computers XIX (Volume 2): British Computer Society Conference on Human Computer Interaction, 33–36.

MacKenzie

Buxton

(1992). Extending Fitts' Law to Two-dimensional Tasks, Proceedings of CHI 92 Conference on Human Factors en Computing Systems, 219–223.

Newell

Rosenbloom

(1981). Mechanisms of Skill Acquisition and the power law of practice, Cognitive Skills and their Acquisition, Anderson

, Erlbaum, Hillsdale, NJ, 1–55.

10.

Pastel

(2006). Measuring the Difficulty of Steering Through Corners, Proceedings of CHI 06 Conference on Human Factors in Computing Systems, 1087–1096.

11.

Shumaker

Zaman

Katon

(2002). Use of a Variable-Stiffness Colonoscope Allows Completion of Colonoscopy after Failure with the Standard Adult Colonoscope, Endoscopy, v. 34, 711–714. http://www.thieme-connect.com/ejournals/abstract/endoscopy/doi/10.1055/s-2002-33442

12.

WebMD (2007), Colorectal Cancer Health Center, Colonoscopy, download May 5, 2007 at http://www.webmd.com/colorectal-cancer/Colonoscopy-16695, See photo link.