Document (#9853)

Author

MacKenzie, I.S.
Buxton, W.

Title

Prediction of pointing and dragging times in graphical user interfaces

Source

Interacting with computers. 6(1994) no.2, S.213-227

Year

1994

Abstract

Describes an experiment which demonstrates that the point-drag sequence common on interactive systems can be modelled as 2 separate Fitts law tasks - point select task followed by a drag select task. Strong prediction models were built; however, comparisons with previous models were not as close as the standard error coefficients implied. Caution is warranted in follow-up applications of models built in research settings. The claim that target height is the appropriate substitute for target width in calculating Fitts' index of difficulty in dragging tasks was not supported. The experiment varied tge dragging target's width and height independently. Models using the horizontal width of the drag target or the smaller of the target's width or height outperformed the target height model

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