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Please use this identifier to cite or link to this item: http://hdl.handle.net/10373/1178

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Title: Movement time for motion-impaired users assisted by force-feedback: effects of movement amplitude, target width, and gravity well width
Authors: Hwang, Faustina
Keates, Simeon
Langdon, Patrick
Clarkson, P. John
Affiliation: University of Abertay Dundee. School of Computing & Engineering Systems
Keywords: Fitts Law
Motion-impaired
Force-feedback
Haptic
Issue Date: Dec-2005
Publisher: Springer Verlag
Type: Journal Article
Refereed: peer-reviewed
Rights: Published version (c)Springer Verlag, available from http://dx.doi.org/10.1007/s10209-005-0114-5. The original publication is available at www.springerlink.com
Citation: Hwang, F., et al. 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. Available from http://dx.doi.org/10.1007/s10209-005-0114-5
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.
URI: http://hdl.handle.net/10373/1178
ISSN: 1615-5289
Appears in Collections:Computing & Engineering Systems Collection

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