Entering Text with a Four-Button Device

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 e cient 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.

• Type: Journal
• Year: 2002
• Where: COLING
• Authors: Kumiko Tanaka-Ishii, Yusuke Inutsuka, Masato Takeichi
• Keywords: Adaptive Language Model, COLING 2002, COLING 2008, Text-entry Device, Text-entry Systems