BackAssist: Augmenting Mobile Touch Manipulation with Back-of-Device Assistance

Liang CHEN  Dongyi CHEN  Xiao CHEN  

IEICE TRANSACTIONS on Information and Systems   Vol.E101-D   No.6   pp.1682-1685
Publication Date: 2018/06/01
Online ISSN: 1745-1361
DOI: 10.1587/transinf.2017EDL8209
Type of Manuscript: LETTER
Category: Computer System
mobile devices,  mobile interface,  back-of-device interaction,  text input,  zooming operation,  

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Operations, such as text entry and zooming, are simple and frequently used on mobile touch devices. However, these operations are far from being perfectly supported. In this paper, we present our prototype, BackAssist, which takes advantage of back-of-device input to augment front-of-device touch interaction. Furthermore, we present the results of a user study to evaluate whether users can master the back-of-device control of BackAssist or not. The results show that the back-of-device control can be easily grasped and used by ordinary smart phone users. Finally, we present two BackAssist supported applications - a virtual keyboard application and a map application. Users who tried out the two applications give positive feedback to the BackAssist supported augmentation.