Chording and tilting for rapid, unambiguous text entry to mobile phones.
Published: 2004
Language: eng
Number of pages: 64
Description: The numeric keypads on mobile phones generally consist of 12 keys, and thus require multiplexing to use them to enter the 36-characters of the English alphabet and decimal numbers. There exist several techniques for entering text using this keypad, but none has emerged as a clearly superior technique. Chording text entry, where users are required to press multiple keys simultaneously, has been shown to be a superior approach to text entry for mobile systems, although it has failed to be adopted widely. We present two new text-entry systems for mobile phones that use chording: ChordTap, which uses chord keys, and TiltText which replaces chording keys with tilting gestures. We present the results of controlled experiments, which show both ChordTap and TiltText to be respectively 45% and 22% faster than the traditional MultiTap, despite a higher error rate for TiltText (9% vs 3% for  ChordTap and MultiTap).
Notes: Adviser: Ravin Balakrishnan.

Thesis (M.Sc.)--University of Toronto, 2004.

Electronic version licensed for access by U. of T. users.

Source: Masters Abstracts International, Volume: 42-06, page: 2249.

MICR copy on microfiche (1 microfiche).