4.6 Article

Effects of Footpad Slope, Movement Direction and Contact Part of Foot on Foot-Based Interactions

Journal

APPLIED SCIENCES-BASEL
Volume 13, Issue 11, Pages -

Publisher

MDPI
DOI: 10.3390/app13116636

Keywords

foot movement; foot interface design; foot touchpad; movement direction

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This study aims to improve the speed and accuracy of touching a touchpad with the feet while seated. The study found that moving the foot at a 30 degrees angle to the right was the most effective direction, using the big toe as the touch area resulted in the best speed and accuracy, and a slope angle of 15 degrees increased work efficiency. These findings can be used for designing foot interfaces.
Feet cannot perform tasks as quickly and with as much dexterity as hands. However, due to the heavy workload placed on hands, there is potential for feet to replace or assist them . In order to use feet more effectively, this study aims to find ways to increase the speed and accuracy of directly touching a touchpad with the feet while in a seated position. The study investigates the effects of three factors: the slope of the touchpad, the direction of the foot movement, and the touch area of the foot used. Regarding the direction of the foot movement, the study found that the most effective direction for both accuracy and speed was at a 30 degrees angle to the right when the front of the right foot was set at 0 degrees. The 0 degrees and 60 degrees angles showed similar efficiencies, but were lower than the 30 degrees angle. The study also found that using the big toe as the touch area resulted in the best speed, accuracy, and subjective satisfaction. The index toe was the second-best option, while using the ball of the foot was the least accurate and slowest option. Lastly, using an slope angle of 15 degrees for the touchpad was found to increase work efficiency compared to using a 7 degrees slope angle. These findings can serve as guidelines for designing foot interfaces.

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