界面可用性对用户SCL信号L-Z复杂度的影响  

Effects of interface usability on lempel-ziv complexity measure of users' SCL

作　　者：李晓军[1,2,3] 陈颂[4] 孙林岩[1,3] 余志勇[5] 

机构地区：[1]西安交通大学管理学院,陕西西安710049 [2]第二炮兵工程大学908教研室,陕西西安710025 [3]过程控制与效率工程教育部重点实验室,陕西西安710049 [4]装甲兵工程学院信息基础室,北京100072 [5]第二炮兵工程大学401教研室,陕西西安710025

出　　处：《计算机工程与设计》2014年第6期2234-2238,2254,共6页Computer Engineering and Design

基　　金：国家科技支撑计划基金项目(2012BAH08F06)

摘　　要：针对信息系统界面可用性对人机交互过程用户皮肤电信号特征的影响规律问题,提出应用归一化的Lempel-Ziv复杂度定量分析交互过程用户皮肤电导水平(skin conductance level,SCL)及其一阶差分绝对值的时域波形变化特征。在可用性测试实验基础上,分析了界面存在可用性问题情形下的用户SCL信号及一阶差分绝对值序列的归一化的Lempel-Ziv复杂度变化规律。两配对样本Wilcoxon符号秩检验结果表明,当界面存在可用性问题时,用户SCL信号的归一化Lempel-Ziv复杂度显著增大,其一阶差分绝对值序列的归一化Lempel-Ziv复杂度显著变小。该结果为基于用户生理信号的人机界面可用性测试技术提供了依据和支持。To quantitatively analyze the effects of interface usability on users＇ SCL change in human-computer interaction,the normalized Lempel-Ziv complexity measure was used to extract the effective and handy features in time domain.Based on usability testing,the change trends of normalized Lempel-Ziv complexity of users＇ SCL and the absolute value of SCL first order difference were obtained when usability problems existed.The results of Wilcoxon signed rank test for two paired-samples showed that the normalized Lempel-Ziv complexity of users＇ SCL increased significantly and the normalized Lempel-Ziv complexity of the absolute value of SCL first order difference decreased significantly when usability problems existed.The results of the study provided evidences and supports for analyzing effects of interface usability on users＇ emotion and cognitive workload during humancomputer interaction.

关 键 词：界面可用性 皮肤电导水平 时域波形 Lempel-Ziv复杂度 可用性测试 

分 类 号：TP311[自动化与计算机技术—计算机软件与理论]