Research on the Optimal Control-Display Ratio of Smart Phone Touch Screen

20 subjects participated in the experiment to conduct sliding the slide bar with different sliding directions and sensitivity on the touch screen of same smart phone sample. The completion performance of the sliding task was recorded and analyzed to explore which sensitivity setting control-display ratio to different sliding directions is the highest. The independent variables are the slip direction and sensitivity. Sliding direction included horizontal and vertical design. The sensitivity has five grades, 1, 2, 3, 4 and 5. The dependent variable is the task completion time. The experimental results show that the sliding performance is the highest when the sensitivity is 2 and 3. The horizontal and vertical sliding direction does not affect the user’s sliding performance. This research provides experimental data for the control-display ratio design of intelligent touch screen mobile phone with sliding function software.