Reation Between the Diagonal Field of View of the Vision Input Devices and the Twiddler's Tapping Performance
The twiddler is a most commonly used input device for wearable computer,its tapping performance directly affects the controllability and usability of wearable computer. According to Fitts' law and reciprocal tapping experiment which Paul Fitts used,the test system which was used to test the tapping performance was established. The 19″liquid-crystal display and two types of head mounted display were the vision input devices in our research. Under another same test condition,the tapping performances of the twiddler were tested,and large numbers of tested data were obtained and analyzed. According to AIC (Aksike's Information Criterion),a criterion for statistical model selection,the most superior tapping models of the twiddler were set up and analyzed. The research results reflect the controllability of the twiddler is more difficult,and is affected by the vision input devices,the degree of the influence increases with decrease of the diagonal field of view,which the vision input device can afford.