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Usability Evaluation of Touchless Mouse Based on Infrared Proximity Sensing

Young Sam Ryu, Do Hyong Koh, Dongseok Ryu, and Dugan Um

Journal of Usability Studies, Volume 7, Issue 1, November 2011, pp. 31 - 39

Abstract

In this work, we examined a touchless mouse, which is a Human-Machine Interface (HMI) device for non-contact gesture inputs to a computer system. The touchless or T-less mouse is used by moving a finger without touching any device or surface. We evaluated it according to the guidelines and testing procedures for evaluating computer pointing devices. Via data collection and statistical techniques, the T-less mouse was compared to a conventional mouse. The results indicated that the average completion time with the T-less mouse is longer than that with a conventional mouse. The number of errors with the T-less mouse were not significantly higher than that with a conventional mouse. A majority of the participants indicated that the T-less mouse could be a useful alternative in special situations in which a conventional mouse cannot be used.

Practitioner’s Take Away

The speed of using a T-less mouse was about three times slower than using a conventional mouse, while there was no significant difference in error rate. There were signs of some training effect in using the T-less mouse, because the second trial set of T-less mouse showed improved speed, although it was not significant. Consequently, the T-less mouse as currently designed is not an alternative to a conventional mouse under standard office or home environments.

However, considering that the majority of the participants agreed that the T-less mouse can be a useful alternative in special circumstances, the T-less mouse may be useful in situations where users need to operate computers with wet, oily, or dusty hands.  The T-less mouse can be a reliable input device, but it takes a longer time to complete tasks compared to a conventional mouse.

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Usability Evaluation of Touchless Mouse Based on Infrared Proximity Sensing