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Improving two-thumb text entry on touchscreen devices

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Published on Jun 6, 2013

Full Title:

Improving two-thumb text entry on touchscreen devices

Authors:

Antti Oulasvirta, Anna Reichel, Wenbin Li, Yan Zhang, Myroslav Bachynskyi, Keith Vertanen, Per Ola Kristensson

Abstract:

We study the design of split keyboards for fast text entry with two thumbs on mobile touchscreen devices. The layout of KALQ was determined through first studying how users should grip a device with two hands. We then assigned letters to keys computationally, using a model of two-thumb tapping. KALQ minimizes thumb travel distance and maximizes alternation between thumbs. An error correction algorithm was added to help address linguistic and motor errors. Users reached a rate of 37 words per minute (with a 5% error rate) after a training program.

URL: http://dl.acm.org/citation.cfm?id=248...

DOI: http://dx.doi.org/10.1145/2470654.248...

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