웹기반 학습에서 학습자료 유형과 학습내용 제시 시기가 인지부하, 효과성 및 효율성에 미치는 효과 = The Effects of Modality of Text and Timing of Information Presentation on Cognitive Load, Effectiveness and Efficiency in Web Based Learning

다국어 초록 (Multilingual Abstract)

The purpose of this research is to analyze the effects of modality of text and timing of information presentation on cognitive load, effectiveness and efficiency on the CLOLE(Cognitive Load Optimized Learning Environment) in web based learning. This study attempted to find out answers to following 3 questions by examining CLOLE design based on its choice of supporting methods. One, whether the modality of text and timing of information presentation have significant effect on learner`s cognitive load on complex skill in web based learning. Two, whether the modality of text and timing of information presentation have significant effect on the effectiveness of learner`s performance of complex skill in web based learning. Three, whether the modality of text and timing of information presentation have significant effect on the efficiency of learner`s performance of complex skill in web based learning. Based on the results of the studies reported in this thesis, a set of refined guidelines is proposed for the design of web based instruction that resolves complex task. First, the message is to remove any information elements that are not necessary for learning. Second, the text accompanying a picture or animation should be presented as auditory text for preventing overload. Third, procedural information on complex task should present just in time for managing intrinsic load and avoiding split attention. These findings are particularly important for the instructional design of solving complex task because more and more educational approaches stress the importance of meaningful complex tasks. This study showed that the combination of the modality of text and complex task solving, and of the timing of information presentation and complex task solving strongly affect the success of these instructional methods.

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