Assessment of Fitts' law for quantifying combined rotational and translational movements

Human Factors
Martin F Stoelen, David L Akin

Abstract

To develop a model for human performance in combined translational and rotational movements based on Fitts' law. Fitts' law has been successfully applied to translational movements in the past, providing generalization beyond a specific task as well as performance predictions. For movements involving both translations and rotations, no equivalent theory exists, making comparisons of input devices for these movements more ambiguous. The study consisted of three experiments. In the first two, participants performed either pure translational or pure rotational movements of 1 degree of freedom. The third experiment involved the same movements combined. On average, the performance times for combined movements were equal to the sum of the times for equivalent separate rotational and translational movements. A simple Fitts' law equivalent for combined movements with a similar slope as the separate components was proposed. In addition, a significant degree of coordination of the combined movements was found. This had a strong bias toward a parallel execution in 12 out of 13 participants. Combined movements with rotations and translations of 1 degree of freedom can be approximated using a simple Fitts' law equivalent. The rotational and...Continue Reading

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Citations

Mar 25, 2016·Assistive Technology : the Official Journal of RESNA·Wenjuan ZhangManida Swangnetr
May 8, 2021··Zhibin Li, Eleftherios Triantafyllidis
Oct 10, 2017··Yuan Yuan QianRobert J. Teather

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