ABSTRACT
The usability of interactive graphic interface for mobile financial service is evaluated using an orthogonal array experiment. The effects of design factors including frame size (Large--468×326 pixels, Small--231×331 pixels), interactivity (Yes/No), data series (multiple, single), grid (Yes/No), and luminance contrast (0, 0.33, 0.67, 0.99) on the visual performance and visual fatigue are examined. Response variables including response time, critical flicker fusion (CFF), user interface satisfaction rating, and overall workload would be collected. Five types of financial tasks would be assigned to each participant including exact value, maximum, correlation, comparison, and trend tasks. Users’ experience will help us to evaluate service efficiency and user interface satisfaction with mobile financial services. The results indicate two-factor interactions of interactivity × grid and interactivity × luminance contrast would significantly affect total response time. In addition, the design with interactivity has higher satisfaction than ones without interactivity.
