期刊名称：International Journal of Asia Digital Art and Design Association
电子版ISSN：1738-8074
出版年度：2016
卷号：20
期号：2
页码：41-47
DOI：10.20668/adada.20.2_41
语种：English
出版社：アジアデジタルアートアンドデザイン学会
摘要：The use of large screen smartphones has been increasing yearly. Large screens have many advantages in that they can display a lot of information at once. However, when people operate smartphones with one hand, several usability problems can occur due to the posture of the user’s hand when holding the device. Among those problems, a significant one we have noticed was that it is difficult to reach the top of the screen with the thumb. In this paper, we propose “IndexAccess”: a system to assist the one-handed operation of comparatively large smartphones by pulling down the GUI on the screen by back-of-device operation using one’s finger (excluding the thumb). In this study, we implemented the IndexAccess system with an application for iOS and a sensor module. After this, we conducted an experiment to investigate the performance and effectiveness of this system on usability by comparing it with Apple’s Reachability in an experiment. Consequently, IndexAccess enables the participants to point more rapidly in the upper half area of screen than Reachability. On the other hand, the participants touched slower in the lower half of the screen than Reachability. It is thought that one of the reasons for this is the prototype was detecting the position of the index finger and moving the display at all times. Consequently, we will improve the usability of IndexAccess by using a pressure-sensitive touch panel instead of a photo-reflective sensor. We will also attempt to move the display not only vertically but horizontally.
