基于Fitts’law的Twiddler点击绩效模型实验  

Experiment of the Twiddler Tapping Performance Model Based on Fitts'Law

作　　者：黄志奇[1] 陈东义[1] 王厚军[1] 

机构地区：[1]电子科技大学移动计算中心,成都610054

出　　处：《电子测量与仪器学报》2008年第5期33-37,共5页Journal of Electronic Measurement and Instrumentation

基　　金：国家863计划支助项目(2006AA01Z113);武器装备预研基金项目(9140A16060406DZ02)资助

摘　　要：Fitts＇law是一种被广泛用于点击设备绩效模型评估的重要准则，Twiddle是可穿戴计算机最常用的输入设备。为了对Twiddler的点击绩效进行评估，参考Paul Fitts所采用的反复敲击试验，建立了Twiddler点击绩效测试系统。根据D／W取值的不同，设计了11种测试条件，使得Twiddler点击难度系数ID在1～5的范围内。在大量试验数据的分析基础上，根据不同的Fitts＇law表达式，建立了3种不同的Twiddler点击绩效模型。结合AIC模型判定准则，得到了最优的Twiddler点击绩效模型，模型反映出Twiddler的点击绩效较低，操控比较困难，这些与Twiddler的实际特性相符。在进行可穿戴计算机GUI设计时，应使Twiddler的点击难度系数ID小于4。Fitts＇ law is an important criterion for evaluating pointing devices, which has been accepted and applied widespread in human computer interaction field, and the twiddler is a most commonly used input device for wearable computer. In order to evaluate the tapping performance of the twiddler, an experiment system was established, which takes the repeat tapping experiment Paul Fitts used as a reference. According to different values of D/W, 11 kinds of test conditions were designed, so the ID （ index of difficulty） of the twiddler tapping was in the range of 1 - 5. Large numbers of test data were analyzed and three kinds of tapping performance models were established based on different Fitts＇ law expresses. According to AIC （Aksike＇s Information Criterion） , a criterion for statistical model selection, the most superior tapping model was set up. The model reflects that the tapping performaccords with the characteristic of the twiddler. When the GUI （ graphical user inance of the twiddler is low, which terface） of wearable computer is designed, the ID of the twiddler taping should be smaller than 4.

关 键 词：Twiddler Fitts'law 绩效模型 AIC判定准则 

分 类 号：TP20[自动化与计算机技术—检测技术与自动化装置]