中文摘要：

Twiddle是可穿戴计算机最常用的输入设备，其点击绩效直接影响其可操作性和可用性．根据费兹原理，参考Paul Fitts所采用的反复敲击试验，建立了点击绩效测试系统．在相同的测试条件下，分别对以19寸液晶显示器和两款头戴显示器为视觉输入装置的情况下对Twiddler点击绩效进行了测试，在大量试验数据的分析基础上，结合赤池信息准则，得到了最优的Twiddler点击绩效模型．通过将3种情况下的Twiddler点击绩效模型对比分析，反映出Twiddler的操控比较困难，同时受视觉输入设备的影响较大，影响程度随着其所能提供的对角线视角的减小而增大．

英文摘要：

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.