The Effects of Encumbrance and Mobility on Touch-Based Gesture Interactions for Mobile Phones

Ng, A., Williamson, J. and Brewster, S. (2015) The Effects of Encumbrance and Mobility on Touch-Based Gesture Interactions for Mobile Phones. In: MobileHCI 2015: 17th International Conference on Human-Computer Interaction with Mobile Devices and Services, Copenhagen, Denmark, 24-27 Aug 2015, pp. 536-546. ISBN 9781450336529 (doi: 10.1145/2785830.2785853)

106744.pdf - Accepted Version



In this paper, we investigate the effects of mobility and encumbrance (holding objects such as shopping bags) on standard gestures commonly performed on touchscreens: tapping, dragging, spreading & pinching and rotating clockwise & anticlockwise when completed using a twohanded input posture. These one- and two- finger on-screen gesture inputs have become common but previous research has only examined tapping performance in everyday walking and encumbered situations. Therefore, a series of Fitts’ Law style targeting tasks was designed to measure the performance of each gesture with users walking only and walking while carrying bags. The results showed that encumbrance and walking had a negative impact on each gesturein terms of accuracy except for rotational actions, which were performed well. Tapping and dragging both performed poorly which shows the input difficulties of single finger interactions when encumbered and on the move. Our findings will help designers choose the appropriate input techniques for future mobile user interfaces and apps in physically demanding contexts.

Item Type:Conference Proceedings
Glasgow Author(s) Enlighten ID:Brewster, Professor Stephen and Ng, Dr Alexander and Williamson, Dr John
Authors: Ng, A., Williamson, J., and Brewster, S.
College/School:College of Science and Engineering > School of Computing Science
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