Usability evaluation of the touch screen user interface design

With the advancement of ICT technologies, touch-screen interface mobile devices become a standard feature. This study aims to evaluate the Popover interface design under different age groups. The UI elements being considered for evaluation include location, window length and font size of the popover in three visual search tasks. The results show that there were significant differences in reaction time and accuracy rate between age groups. The worst performance was found in the older group. The best button position was on the bottom screen. In addition, significant performance differences between popover window length and font size were also found. Generally speaking, it is recommended to use the popover window with long cell length, and bigger font size for better readability, especially for the older age group users.