F4-4　The effects of smartphone width on touch performance

Abstract

The aim of the study is to test the effects of smartphone width on touch performances in order to investigate the appropriate size of smartphone for one-handed interaction. We used four different width level for the experiment, which were 67mm, 70mm, 72mm, and 74mm. Participants were asked to perform tapping task. We measured two touch performances, success rate and task completion time. The success rate of 67mm device was higher than that of other devices. We confirmed that this results come from the poor performances at marginal screen area. However, task completion time of 67mm device was unexpectedly poor than that of other devices.