Usability Views Article Details  home | timeline | recent | popular | e-reports | userati | books | about  AppLens and LaunchTile: Two Designs for One-Handed Thumb Use on Small Devices (09 Jan 2005) Based on our participants’ strong interest in one-handed PDA use, and generally positive reactions to their interaction experiences, we are convinced of the value of research in one-handed, notification-based designs. We have less evidence of the utility of design scalability. Although we have demonstrated the feasibility of transferring both interfaces to smartphones, we do not know whether the designs support smartphone usage scenarios. With respect to command gestures, we are encouraged by the modest yet positively skewed satisfaction ratings for gesture interaction as well as what we consider very reasonable performance for both directional gesture execution and navigation tasks. It’s clear, however, that the introduction of two additional diagonal gestures degrades performance and confuses users. We will need to explore whether AppLens can be an effective interface without these additional commands, or whether a different mapping of commands to gestures or on-screen cues can make the full set of gestures as reliable and learnable as directional gestures seem to be. Finally, we anticipate that extended usage studies with wider populations will unearth more subtle usability issues. With refinement, we hope a single design will emerge to provide a consistent, flexible environment designed for single-handed use. Article URL: ftp://ftp.cs.umd.edu/pub/hcil/Reports-Abstracts-Bibliography/2004-37html/2004-37.htm Read 62 more articles from University Of Maryland sorted by date, popularity, or title. Next Article: Information Visualization and the Challenge of Universal Usability     This site is a labour of love built by Chris McEvoy