ABSTRACT
This paper presents an experimental study on behavioral characteristics of old users compared to young users in the use of control on display interface. Thirty two seniors who are over 50 years old and 12 juniors who are in 20s years old were participated in this study. Three basic tasks in touch interface, which are tap, move, and flick, were performed by the users. For the tap task, response time and point of touch were collected and the response bias was calculated for each trial. For the move task, task completion time and the distance of finger movements were recorded for each trial. For the flick task, task completion time and flicking distance were recorded. From the collected data, temporal and spatial differences in interacting behavior between young and old users were analyzed. Although the older users took longer to complete tap, move and flick task, their accuracy of pointing was as good as the younger users in tap task. In the move and flick task, the older users moved their finger less. Gender also effects on the touch behavior. Young female users were slower then young males, however old females were faster than old males in the tap and the move task. There was no statistically significant gender effect on task completion time in the flick task. Using index finger to touch (both handed condition) reduced task completion time and increased accuracy in the tap and the move task.
