A model of two-thumb chording on a phone keypad

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A model of two-thumb chording on a phone keypad

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ACM International Conference Proceeding Series archive
Proceedings of the 11th International Conference on Human-Computer Interaction with Mobile Devices and Services table of contents

Bonn, Germany

SESSION: Input techniques table of contents

Article No. 8

Year of Publication: 2009

ISBN:978-1-60558-281-8

Authors

Nirmal Patel	Georgia Institute of Technology, Atlanta, GA
James Clawson	Georgia Institute of Technology, Atlanta, GA
Thad Starner	Georgia Institute of Technology, Atlanta, GA

Sponsors

SIGCHI : Specialist Interest Group in Computer-Human Interaction of the ACM
SIGMOBILE: ACM Special Interest Group on Mobility of Systems, Users, Data and Computing

Publisher

ACM New York, NY, USA

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Downloads (6 Weeks): 28, Downloads (12 Months): 28, Citation Count: 0

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ABSTRACT

When designing a text entry system for mobile phone keypads, a designer needs to overcome the ambiguity that arises from mapping the 26 letters of the roman alphabet to only 12 keys (0--9, *, #). In this paper, we present a novel two-thumb chording system for text entry on a standard 12-key mobile phone keypad and introduce a performance model based on Fitts' Law for an expert user. The model provides a behavioral description of the user and predicts a text entry rate of 55.02 wpm.

REFERENCES

Note: OCR errors may be found in this Reference List extracted from the full text article. ACM has opted to expose the complete List rather than only correct and linked references.

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