S. J. Castellucci and I. S. Mackenzie, Graffiti vs. unistrokes: an empirical comparison, Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '08), pp.305-308, 2008.

J. O. Wobbrock, B. A. Myers, and J. A. Kembel, EdgeWrite: a stylus-based text entry method designed for high accuracy and stability of motion, Proceedings of the 16th annual ACM symposium on User interface software and technology (UIST '03), pp.61-70, 2003.

F. E. Sandnes, T. B. Tan, A. Johansen, E. Sulic, E. Vesterhus et al., Making touchbased kiosks accessible to blind users through simple gestures, Universal Access in the Information Society, vol.11, issue.4, pp.421-431, 2012.

N. Banovic, K. Yatani, and K. N. Truong, Escape-Keyboard: A Sight-Free One-Handed Text Entry Method for Mobile Touch-screen Devices, Int. J. Mob. Hum. Comput. Interact, vol.5, issue.3, pp.42-61, 2013.

D. J. Ward, A. F. Blackwell, and D. J. Mackay, Dasher-a data entry interface using continuous gestures and language models, Proceedings of the 13th annual ACM symposium on User interface software and technology (UIST '00), pp.129-137, 2000.

D. Goldberg and C. Richardson, Touch-typing with a stylus, Proceedings of the INTERACT '93 and CHI '93 Conference on Human Factors in Computing Systems (CHI '93), pp.80-87, 1993.

I. S. Mackenzie and S. X. Zhang, The design and evaluation of a high-performance soft keyboard, Proceedings of the SIGCHI conference on Human Factors in Computing Systems (CHI '99), pp.25-31, 1999.

X. Bi, B. A. Smith, and . S. Zhai, Quasi-qwerty soft keyboard optimization, Proceedings of the SIGCHI Conference on Human Factors in Computing Systems (CHI '10), pp.283-286, 2010.

S. Zhai and B. A. Smith, Alphabetically biased virtual keyboards are easier to use: layout does matter, CHI '01 Extended Abstracts on Human Factors in Computing Systems (CHI EA '01), pp.321-322, 2001.

E. Matias, I. S. Mackenzie, and W. Buxton, Half-QWERTY: typing with one hand using your two-handed skills, Conference Companion on Human Factors in Computing Systems (CHI '94), pp.51-52, 1994.

F. E. Sandnes and A. Aubert, Bimanual text entry using game controllers: relying on users' spatial familiarity with QWERTY, Interacting with Computers, vol.19, issue.2, pp.140-150, 2007.

D. Rempel, The split keyboard: An ergonomics success story, Human Factors, vol.50, issue.3, pp.385-392, 2008.

A. Çaxir, Acceptance of the adjustable keyboard, Ergonomics, vol.38, issue.9, pp.1728-1744, 1995.

M. Honan, E. Serina, R. Tal, and D. Rempel, Wrist postures while typing on a standard and split keyboard, Proceedings of the Human Factors and Ergonomics Society annual meeting, vol.39, pp.366-368, 1995.

M. J. Smith, B. T. Karsh, F. T. Conway, W. J. Cohen, C. A. James et al., Effects of a split keyboard design and wrist rest on performance, posture, and comfort, Human Factors, vol.40, issue.2, pp.324-336, 1998.

D. Rempel, D. Nathan-roberts, B. Y. Chen, and D. Odell, The effects of split keyboard geometry on upper body postures, Ergonomics, vol.52, issue.1, pp.104-111, 2009.

W. Shi, C. Yu, X. Yi, Z. Li, and . Y. Shi, TOAST: Ten-Finger Eyes-Free Typing on Touchable Surfaces, Proc. ACM Interact. Mob. Wearable Ubiquitous Technol, vol.2, issue.1, 2018.

S. Zhu, T. Luo, X. Bi, and . S. Zhai, Typing on an Invisible Keyboard, Proceedings of the 2018 CHI Conference on Human Factors in Computing Systems (CHI '18), 2018.

S. Azenkot and S. Zhai, Touch behavior with different postures on soft smartphone keyboards, Proceedings of the 14th international conference on Human-computer interaction with mobile devices and services (MobileHCI '12), pp.251-260, 2012.

M. B. Trudeau, P. J. Catalano, D. L. Jindrich, and J. T. Dennerlein, Tablet keyboard configuration affects performance, discomfort and task difficulty for thumb typing in a two-handed grip, PloS one, vol.8, issue.6, p.67525, 2013.

M. I. Lin, R. H. Hong, J. H. Chang, and X. M. Ke, Usage position and virtual keyboard design affect upper-body kinematics, discomfort, and usability during prolonged tablet typing, PloS one, vol.10, issue.12, p.143585, 2015.

J. Hong, S. Heo, P. Isokoski, and G. Lee, SplitBoard: A simple split soft keyboard for wristwatch-sized touch screens, Proceedings of the 33rd Annual ACM Conference on Human Factors in Computing Systems, pp.1233-1236, 2015.

I. S. Mackenzie and R. W. Soukoreff, Phrase sets for evaluating text entry techniques, CHI '03 Extended Abstracts on Human Factors in Computing Systems (CHI EA '03), pp.754-755, 2003.

, JASP Team: JASP (Version 0.9, 2018.