Abstract
| Original language | English |
|---|---|
| Pages (from-to) | 85-95 |
| Number of pages | 11 |
| Journal | Universal Access in the Information Society |
| Volume | 4 |
| Issue number | 2 |
| DOIs | |
| State | Published - Dec 2005 |
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Movement time for motion-impaired users assisted by force-feedback : effects of movement amplitude, target width, and gravity well width. / Hwang, Faustina; Keates, Simeon; Langdon, Patrick; Clarkson, P. John.
In: Universal Access in the Information Society, Vol. 4, No. 2, 12.2005, p. 85-95.Research output: Contribution to journal › Article
TY - JOUR
T1 - Movement time for motion-impaired users assisted by force-feedback
T2 - Universal Access in the Information Society
AU - Hwang,Faustina
AU - Keates,Simeon
AU - Langdon,Patrick
AU - Clarkson,P. John
PY - 2005/12
Y1 - 2005/12
N2 - 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.
AB - 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.
U2 - 10.1007/s10209-005-0114-5
DO - 10.1007/s10209-005-0114-5
M3 - Article
VL - 4
SP - 85
EP - 95
JO - Universal Access in the Information Society
JF - Universal Access in the Information Society
SN - 1615-5289
IS - 2
ER -