Quikwriting: continuous stylus-based text entry
Proceedings of the 11th annual ACM symposium on User interface software and technology
Dual touch: a two-handed interface for pen-based PDAs
UIST '00 Proceedings of the 13th annual ACM symposium on User interface software and technology
Peephole displays: pen interaction on spatially aware handheld computers
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Examining mobile phone text legibility while walking
CHI '04 Extended Abstracts on Human Factors in Computing Systems
Two-handed interaction on a tablet display
CHI '04 Extended Abstracts on Human Factors in Computing Systems
AppLens and launchTile: two designs for one-handed thumb use on small devices
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Gait phase effects in mobile interaction
CHI '05 Extended Abstracts on Human Factors in Computing Systems
Mobile text entry: relationship between walking speed and text input task difficulty
Proceedings of the 7th international conference on Human computer interaction with mobile devices & services
Proceedings of the 7th international conference on Human computer interaction with mobile devices & services
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Target size study for one-handed thumb use on small touchscreen devices
Proceedings of the 8th conference on Human-computer interaction with mobile devices and services
Reading on-the-go: a comparison of audio and hand-held displays
Proceedings of the 8th conference on Human-computer interaction with mobile devices and services
Vector Keyboard for Touch Screen Devices
EHAWC '09 Proceedings of the International Conference on Ergonomics and Health Aspects of Work with Computers: Held as Part of HCI International 2009
Proceedings of the 22nd annual ACM symposium on User interface software and technology
Vector keyboard for android platform-based devices
HI'11 Proceedings of the 2011 international conference on Human interface and the management of information - Volume Part I
Extending mobile user ambient awareness for nomadic text entry
Proceedings of the 23rd Australian Computer-Human Interaction Conference
Designing and Evaluating Mobile Interaction: Challenges and Trends
Foundations and Trends in Human-Computer Interaction
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Effective text entry on handheld devices remains a significant problem in the field of mobile computing. On a personal digital assistant (PDA), text entry methods traditionally support input through the motion of a stylus held in the user's dominant hand. In this paper, we present the design of a two-handed software keyboard for a PDA which specifically takes advantage of the thumb in the non-dominant hand. We compare our chorded keyboard design to other stylus-based text entry methods in an evaluation that studies user input in both stationary and mobile settings. Our study shows that users type fastest using the miniqwerty keyboard, and most accurately using our two-handed keyboard. We also discovered a difference in input performance with the mini-qwerty keyboard between stationary and mobile settings. As a user walks, text input speed decreases while error rates and mental workload increases; however, these metrics remain relatively stable in our two-handed technique despite user mobility.