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Twiddler的点击绩效评估


□ 黄志奇 陈东义 王厚军

  (电子科技大学 移动计算中心, 成都610054)
  摘 要:Twiddler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,对Twiddler和鼠标往复点击绩效进行了测试,在大量实验数据的分析基础上,结合赤池信息准则,得到了最优的Twiddler和鼠标点击绩效模型。通过将Twiddler与鼠标的点击绩效模型对比分析,反映出Twiddler的点击绩效比鼠标的点击绩效低,操控比较困难。在可穿戴计算机的人机界面设计时,为了增强Twiddler的可控性,应使Twiddler点击的难度系数小于4。
  关键词:Twiddler;费兹原理;点击绩效模型;赤池信息准则
  中图分类号:TP20 文献标志码:A
   文章编号:10013695(2009)01022103
  
  Evaluation of Twiddler’s tapping performance
  HUANG Zhiqi,CHEN Dongyi,WANG Houjun
  (Center of Mobile Computing, University of Electronic Science & Technology of China, Chengdu 610054, China)
  Abstract:The twiddler was a most commonly used input device for wearable computer, its tapping performance directly affected the controllability and usability of wearable computer. According to Fitts’ law and reciprocal tapping experiment which Paul Fitts used, the test system which used to test the tapping performance was established. The tapping performances of the Twiddler and the mouse were tested under the same test condition, and large numbers of tested data were obtained and analyzed. According to AIC(Akaike’s information criterion), a criterion for statistical model selection, the most superior tapping models of the Twiddler and the mouse were set up. Contrasting to the mouse, the tapping performance and the controllability which the Twiddler owns were lower. When us design the GUI (graphical user interface) of the wearable computer, in order to enhance the controllability of the Twiddler, the index difficulty of the Twiddler’s tap should be smaller than 4. ......
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