Public touchscreens are filthy and, regardless of how often they are cleaned, they pose a considerable risk in the transmission of bacteria and viruses. While we rely on their use, we should find a feasible alternative to touch devices. Non-touch interaction, via the use of mid-air gestures, has been previously labelled as not user friendly and unsuitable. However, previous works have extensively compared such interaction to precise mouse movements. In this paper, we investigate and compare the usability of an interface controlled via a touchscreen and a non-touch device. Participants (N=22) using a touchscreen and the Leap Motion Controller, performed tasks on a mock-up ticketing machine, later evaluating their experience using the System Usability and Gesture Usability scales. Results show that, in contrast to the previous works, the non-touch method was usable and quickly learnable. We conclude with recommendations for future work on making a non-touch interface more user-friendly.
翻译：公共触摸屏是肮脏的,不管它们经常被清洗,它们都对细菌和病毒的传播构成相当大的风险。虽然我们依靠它们的使用,但我们应该找到一个可行的替代触摸装置。通过中空手势进行的非触摸互动以前被贴上不方便用户和不合适的标签。然而,以前的作品将这种互动与精确的鼠标运动进行了广泛的比较。在本文中,我们调查并比较了通过触摸屏和非触摸装置控制的界面的可用性。参与者(N=22)使用触摸屏和滑动运动控制器,在模拟售票机上完成了任务,后来评估了他们使用系统可用性和可操作性尺度的经验。结果显示,与以往的作品不同,非触摸方法是有用的,可以迅速学习。我们最后建议今后如何使非触摸界面更方便用户。
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