Movement time for motion-impaired users assisted by force-feedback: effects of movement amplitude, target width and gravity well width

Hwang, F. ORCID: https://orcid.org/0000-0002-3243-3869, Keates, S., Langdon, P. and Clarkson, P.J. (2005) Movement time for motion-impaired users assisted by force-feedback: effects of movement amplitude, target width and gravity well width. Universal Access in the Information Society, 4 (2). 85 - 95. doi: 10.1007/s10209-005-0114-5

Abstract/Summary

This paper presents a study investigating how the performance of motion-impaired computer users in point and click tasks varies with target distance (A), target width (W), and force-feedback gravity well width (GWW). Six motion-impaired users performed point and click tasks across a range of values for A, W, and GWW. Times were observed to increase with A, and to decrease with W. Times also improved with GWW, and, with the addition of a gravity well, a greater improvement was observed for smaller targets than for bigger ones. It was found that Fitts Law gave a good description of behaviour for each value of GWW, and that gravity wells reduced the effect of task difficulty on performance. A model based on Fitts Law is proposed, which incorporates the effect of GWW on movement time. The model accounts for 88.8% of the variance in the observed data.

Item Type	Article
URI	https://reading-clone.eprints-hosting.org/id/eprint/15292
Item Type	Article
Refereed	Yes
Divisions	Life Sciences > School of Biological Sciences > Department of Bio-Engineering
Uncontrolled Keywords	Fitts Law - Motion-impaired - Force-feedback - Haptic
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