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The Effects of Intended Use on Target Acquisition

This is a completed project.


Fitts’s Law has been used extensively in HCI to describe 2D targeting; however, the controlled tasks generally used neglect aspects of real-world pointing, including how the intended use of a target affects its acquisition. We studied aiming to a target in four tasks requiring varying precision after acquisition. Our results present the first evidence that the intended use of a target affects its acquisition in terms of movement time and motion kinematics for computer aiming. Important for researchers who model 2D targeting, our results also have particular impact for HCI research that uses motion kinematics, and interfaces designs that use endpoint prediction to assist with aiming on large displays.


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Mandryk, R., Lough, C. (2011), Proceedings of the 2011 Annual Conference on Human Factors in Computing Systems (CHI 2011), Vancouver, BC, Canada. 1649-1652. <doi:10.1145/1978942.1979182>