Hwang, Faustina, Keates, Simeon ORCID: 0000-0002-2826-672X, Langdon, Patrick and Clarkson, P. John (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). pp. 85-95. ISSN 1615-5289 (Print), 1615-5297 (Online) (doi:https://doi.org/10.1007/S10209-005-0114-5)

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Abstract

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
Additional Information:	[1] Acknowledgements (funding): This work is funded by the Canadian Cambridge Trust, NSERC, and the EPSRC. [2] Copyright: © Springer-Verlag 2005
Uncontrolled Keywords:	movement time, motion impaired users assisted by force-feedback, movement amplitude, target width, gravity well width
Subjects:	Q Science > QA Mathematics > QA75 Electronic computers. Computer science T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General)
Faculty / School / Research Centre / Research Group:	Faculty of Engineering & Science
Related URLs:	Publisher Publisher
Last Modified:	14 Oct 2016 09:29
URI:	http://gala.gre.ac.uk/id/eprint/12659

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