Comparative study on text entry methods for mobile devices with a hover function
Toshiaki Aiyoshizawa, Takashi Komuro · 2017
In this paper, we compared text entry methods for mobile devices such as smartphones, in which part of a software keyboard around the finger position is enlarged by using a hover function. We examined four methods: fixing the center of enlargement, not fixing the center of enlargement, adding a scrolling function, and using a standard software keyboard for reference. We recruited 12 participants and evaluated the text entry speed and error rates. The method in which the center of enlargement was fixed had the slowest text entry speed, but showed an error rate that was significantly lower than the method in which the center of enlargement was not fixed. This result shows that fixing the center of enlargement enables users to select keys stably and enter target letters accurately.