A Method for Reducing Disorientation in Hypermedia Educational Systems  

作　　者：秦华 饶培伦 

机构地区：[1]Department of Industrial Engineering,Tsinghua University

出　　处：《Tsinghua Science and Technology》2009年第5期655-662,共8页清华大学学报（自然科学版（英文版）

摘　　要：Learners in hypermedia educational systems （HES） often become disorientated and experience cognitive overhead. This study presents a method for reducing disorientation in HES. The study uses two usability methods, retrospective thinking aloud （RTA） and performance measure （PM）, to find usability problems in HES that impact participant disorientation. The participants had field independent （FI） and field dependent （FD） cognitive styles. The results indicate that the participants＇ disorientation degree using the RTA method is significantly less than those using the PM method. For the effect of cognitive styles, only the average search steps index showed that FI learners are significantly less disorientated than FD learners. The results can help designers of hyperrnedia systems design tools to reduce user disorientation.Learners in hypermedia educational systems （HES） often become disorientated and experience cognitive overhead. This study presents a method for reducing disorientation in HES. The study uses two usability methods, retrospective thinking aloud （RTA） and performance measure （PM）, to find usability problems in HES that impact participant disorientation. The participants had field independent （FI） and field dependent （FD） cognitive styles. The results indicate that the participants＇ disorientation degree using the RTA method is significantly less than those using the PM method. For the effect of cognitive styles, only the average search steps index showed that FI learners are significantly less disorientated than FD learners. The results can help designers of hyperrnedia systems design tools to reduce user disorientation.

关 键 词：DISORIENTATION hypermedia educational systems usability evaluation methods cognitive styles 

分 类 号：G434[文化科学—教育学]