Revisiting and validating a model of two-thumb text entry

Authors:
Edward Clarkson;Kent Lyons;James Clawson;Thad Starner
Affiliations:
Georgia Institute of Technology, Atlanta, GA;Georgia Institute of Technology, Atlanta, GA;Georgia Institute of Technology, Atlanta, GA;Georgia Institute of Technology, Atlanta, GA
Venue:
Proceedings of the SIGCHI Conference on Human Factors in Computing Systems
Year:
2007

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Abstract

MacKenzie and Soukoreff have previously introduced a Fitts' Law-based performance model of expert two-thumb text entry on mini-QWERTY keyboards [4]. In this work we validate the original model using results from a longitudinal study of mini-QWERTY keyboards, and update the model to account for observed inter-key time data.