@inproceedings{2f0607352b044ea19ea560f18ea60394,
title = "QaZ keyboard: QWERTY based portrait soft keyboard",
abstract = "In this paper, we present a QAZ keyboard, which is a QWERTY keyboard that facilitates one-handed thumb input for a mobile device with a large touchscreen. To design the keyboard, we first conducted experiments to investigate pointing performance on a large mobile touchscreen using one-handed thumb. The results showed that vertically long areas around the center of the touchscreen would be suitable to place a keyboard in terms of accuracy and time of pointing. Based on this finding, we designed and implemented the QAZ keyboard for Android-based devices. A longitudinal study with 4 participants showed that the mean text entry speed was 18.2wpm, and the mean error rate was 9.1%. Moreover, a comparative study of the QAZ keyboard compared to a QWERTY keyboard showed that the QAZ keyboard{\textquoteright}s error rate was significantly lower than the QWERTY keyboard.",
keywords = "Mobile devices, One-handed interaction, Onehanded thumb, Pointing, Smartphone, Software keyboard, Text entry, Touch screen, Virtual keyboard",
author = "Hiroyuki Hakoda and Buntarou Shizuki and Jiro Tanaka",
year = "2016",
doi = "10.1007/978-3-319-40406-6_3",
language = "English",
isbn = "9783319404059",
volume = "9748",
series = "Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)",
publisher = "Springer Verlag",
pages = "24--35",
booktitle = "Design, User Experience, and Usability: Technological Contexts - 5th International Conference, DUXU 2016 Held as Part of HCI International 2016, Proceedings",
address = "Germany",
note = "5th International Conference on Design, User Experience, and Usability, DUXU 2016 Held as Part of 18th International Conference on Human-Computer Interaction, HCI International 2016 ; Conference date: 17-07-2016 Through 22-07-2016",
}