The design and evaluation of a high-performance soft keyboard
Proceedings of the SIGCHI conference on Human Factors in Computing Systems
Predicting text entry speed on mobile phones
Proceedings of the SIGCHI conference on Human Factors in Computing Systems
The metropolis keyboard - an exploration of quantitative techniques for virtual keyboard design
UIST '00 Proceedings of the 13th annual ACM symposium on User interface software and technology
LetterWise: prefix-based disambiguation for mobile text input
Proceedings of the 14th annual ACM symposium on User interface software and technology
Model for non-expert text entry speed on 12-button phone keypads
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Alphabetically constrained keypad designs for text entry on mobile devices
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
An enhanced multitap text entry method with predictive next-letter highlighting
CHI '05 Extended Abstracts on Human Factors in Computing Systems
LetterEase: Improving text entry on a handheld device via letter reassignment
OZCHI '05 Proceedings of the 17th Australia conference on Computer-Human Interaction: Citizens Online: Considerations for Today and the Future
Évaluation heuristique d'un clavier virtuel pour la télévision interactive
IHM '06 Proceedings of the 18th International Conferenceof the Association Francophone d'Interaction Homme-Machine
IHM 2005 Proceedings of the 17th international conference on Francophone sur l'Interaction Homme-Machine
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
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Positional mapping: keyboard mapping based on characters writing positions for mobile devices
Proceedings of the 9th international conference on Multimodal interfaces
Positional mapping Myanmar text input scheme for mobile devices
Proceedings of the 9th international conference on Human computer interaction with mobile devices and services
UniGlyph: une méthode universelle pour la saisie de texte sur dispositifs mobiles
IHM '07 Proceedings of the 19th International Conference of the Association Francophone d'Interaction Homme-Machine
A flexible on-screen keyboard: dynamically adapting for individuals' needs
UAHCI'07 Proceedings of the 4th international conference on Universal access in human-computer interaction: applications and services
BloNo: a new mobile text-entry interface for the visually impaired
UAHCI'07 Proceedings of the 4th international conference on Universal access in human-computer interaction: ambient interaction
Using cell phone keyboards is (NP) hard
FUN'10 Proceedings of the 5th international conference on Fun with algorithms
WeGliss, clavier pour la télévision interactive
Conference Internationale Francophone sur I'Interaction Homme-Machine
Optimizing a personalized cellphone keypad
ICHIT'11 Proceedings of the 5th international conference on Convergence and hybrid information technology
WeSlide: gestural text entry for elderly users of interactive television
Proceedings of the 11th european conference on Interactive TV and video
OnScreenDualScribe: a computer operation tool for users with a neuromuscular disease
UAHCI'13 Proceedings of the 7th international conference on Universal Access in Human-Computer Interaction: design methods, tools, and interaction techniques for eInclusion - Volume Part I
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A novel text entry system designed based on the ubiquitous 12-button telephone keypad and its adaptation for a soft keypad are presented. This system can be used to enter full text (letters + numbers + special characters) on devices where the number of keys or the keyboard area is limited. Letter-frequency data is used for assigning letters to the positions of a 3x3 matrix on keys, enhancing the entry of the most frequent Letters performed by a double-click. Less frequent letters and characters are entered based on a 3x3 adjacency matrix using an unambiguous, two-keystroke scheme. The same technique is applied to a virtual or soft keyboard layout so letters and characters are entered with taps or slides on an 11-button keypad. Based on the application of Fitts' law, this system is determined to be 67% faster than the QWERTY soft keyboard and 31% faster than the multi-tap text entry system commonly used on cell phones today. The system presented in this paper is implemented and runs on Palm OS PDAs, replacing the built-in QWERTY keyboard and Graffiti recognition systems of these PDAs.