Entering text with a four-button device

Authors:
Kumiko Tanaka-Ishii;Yusuke Inutsuka;Masato Takeichi
Affiliations:
The University of Tokyo, Bunkyoku Hongo, Japan;The University of Tokyo, Bunkyoku Hongo, Japan;The University of Tokyo, Bunkyoku Hongo, Japan
Venue:
COLING '02 Proceedings of the 19th international conference on Computational linguistics - Volume 1
Year:
2002

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Abstract

This paper presents the design of a text-entry device that requires only four buttons. Such a device is applicable as the text interface of portable machines and as an interface for disabled people. The text-entry system is predictive; the basis for this is an adaptive language model. Our evaluation showed that the system is at least as efficient for the entry of free text as the text-entry systems of current-generation mobile phones. The system requires fewer keystrokes than a full keyboard. After adaptation, one user reached a maximum speed of 23 wpm.