Abstract
We present a single-handed and eyes-free Japanese kana text input system on touch screens of mobile devices. We first conducted preliminary experiments to investigate the accuracy with which subjects could single-handedly point to and flick without using their eyes. We found from the results that users can point at a screen that was divided into 2 x 2 with 100% accuracy and that users can flick at a 2 x 2 grid without using their eyes with 96.1% accuracy using our algorithm for flick recognition. The system used kana letter input based on two-stroke input with three keys to enable accurate eyes-free typing. First, users flick for consonant input, and then similarly flick for vowel input. We conducted a long-term user study to measure basic text entry speed and error rate performance under eyes-free conditions, and readability of transcribed phrases. As a result, the mean text entry speed was 51.2 characters per minute (cpm) in the 10th session of the user study and the mean error rate was 0.6% of all characters. The mean text entry speed was 33.9 cpm in the 11th session, which was conducted under totally eyes-free conditions and the mean error rate was 4.8% of all characters. We not only measured cpm and error rate, but also measured error rate of reading, which we devised as a novel metric to measure how accurately users can read transcribed phrases. The mean error rate of reading in the 11th session was 5.7% of all phrases.
| Original language | English |
|---|---|
| Title of host publication | MobileHCI 2013 - Proceedings of the 15th International Conference on Human-Computer Interaction with Mobile Devices and Services |
| Pages | 161-170 |
| Number of pages | 10 |
| DOIs | |
| Publication status | Published - 2013 |
| Externally published | Yes |
| Event | 15th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2013 - Munich, Germany Duration: 2013 Aug 27 → 2013 Aug 30 |
Other
| Other | 15th International Conference on Human-Computer Interaction with Mobile Devices and Services, MobileHCI 2013 |
|---|---|
| Country | Germany |
| City | Munich |
| Period | 13/8/27 → 13/8/30 |
Fingerprint
Keywords
- heads-up writing
- multi-tap
- one-handed interaction
- pointing
- shoulder surfing
- text entry
- touch typing
- touchscreen phones
ASJC Scopus subject areas
- Human-Computer Interaction
- Software
Cite this
No-look flick : Single-handed and eyes-free Japanese text input system on touch screens of mobile devices. / Fukatsu, Yoshitomo; Shizuki, Buntarou; Tanaka, Jiro.
MobileHCI 2013 - Proceedings of the 15th International Conference on Human-Computer Interaction with Mobile Devices and Services. 2013. p. 161-170.Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - No-look flick
T2 - Single-handed and eyes-free Japanese text input system on touch screens of mobile devices
AU - Fukatsu, Yoshitomo
AU - Shizuki, Buntarou
AU - Tanaka, Jiro
PY - 2013
Y1 - 2013
N2 - We present a single-handed and eyes-free Japanese kana text input system on touch screens of mobile devices. We first conducted preliminary experiments to investigate the accuracy with which subjects could single-handedly point to and flick without using their eyes. We found from the results that users can point at a screen that was divided into 2 x 2 with 100% accuracy and that users can flick at a 2 x 2 grid without using their eyes with 96.1% accuracy using our algorithm for flick recognition. The system used kana letter input based on two-stroke input with three keys to enable accurate eyes-free typing. First, users flick for consonant input, and then similarly flick for vowel input. We conducted a long-term user study to measure basic text entry speed and error rate performance under eyes-free conditions, and readability of transcribed phrases. As a result, the mean text entry speed was 51.2 characters per minute (cpm) in the 10th session of the user study and the mean error rate was 0.6% of all characters. The mean text entry speed was 33.9 cpm in the 11th session, which was conducted under totally eyes-free conditions and the mean error rate was 4.8% of all characters. We not only measured cpm and error rate, but also measured error rate of reading, which we devised as a novel metric to measure how accurately users can read transcribed phrases. The mean error rate of reading in the 11th session was 5.7% of all phrases.
AB - We present a single-handed and eyes-free Japanese kana text input system on touch screens of mobile devices. We first conducted preliminary experiments to investigate the accuracy with which subjects could single-handedly point to and flick without using their eyes. We found from the results that users can point at a screen that was divided into 2 x 2 with 100% accuracy and that users can flick at a 2 x 2 grid without using their eyes with 96.1% accuracy using our algorithm for flick recognition. The system used kana letter input based on two-stroke input with three keys to enable accurate eyes-free typing. First, users flick for consonant input, and then similarly flick for vowel input. We conducted a long-term user study to measure basic text entry speed and error rate performance under eyes-free conditions, and readability of transcribed phrases. As a result, the mean text entry speed was 51.2 characters per minute (cpm) in the 10th session of the user study and the mean error rate was 0.6% of all characters. The mean text entry speed was 33.9 cpm in the 11th session, which was conducted under totally eyes-free conditions and the mean error rate was 4.8% of all characters. We not only measured cpm and error rate, but also measured error rate of reading, which we devised as a novel metric to measure how accurately users can read transcribed phrases. The mean error rate of reading in the 11th session was 5.7% of all phrases.
KW - heads-up writing
KW - multi-tap
KW - one-handed interaction
KW - pointing
KW - shoulder surfing
KW - text entry
KW - touch typing
KW - touchscreen phones
UR - http://www.scopus.com/inward/record.url?scp=84883725196&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=84883725196&partnerID=8YFLogxK
U2 - 10.1145/2493190.2493243
DO - 10.1145/2493190.2493243
M3 - Conference contribution
AN - SCOPUS:84883725196
SN - 9781450322737
SP - 161
EP - 170
BT - MobileHCI 2013 - Proceedings of the 15th International Conference on Human-Computer Interaction with Mobile Devices and Services
ER -