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DualKey: Miniature Screen Text Entry via Finger Identification
Aakar Gupta, Ravin Balakrishnan

CHI '16: ACM Conference on Human Factors in Computing Systems
Session: How Fast Can You Type on Your Phone?

Abstract
Fast and accurate access to keys for text entry remains an open question for miniature screens. Existing works typically use a cumbersome two-step selection process, first to zero-in on a particular zone and second to make the key selection. We introduce DualKey, a miniature screen text entry technique with a single selection step that relies on finger identification. We report on the results of a 10 day longitudinal study with 10 participants that evaluated speed, accuracy, and learning. DualKey outperformed the existing techniques on long-term performance with a speed of 19.6 WPM. We then optimized the keyboard layout for reducing finger switching time based on the study data. A second 10 day study with eight participants showed that the new sweqty layout improved upon DualKey even further to 21.59 WPM for long-term speed, was comparable to existing techniques on novice speed and outperformed existing techniques on novice accuracy rate.

DOI:: http://dx.doi.org/10.1145/2858036.285...
WEB:: https://chi2016.acm.org/

Recorded at the 2016 CHI Conference on Human Factors in Computing Systems in San Jose, CA, United States, May 7-12, 2016