抄録
A 100-inch television system is utilized for lectures in which documents and educational video are presented. To investigate degree of understanding of the lectures, a questionnaire is given to each student attending the four lectures which has different contents of the lectures or different attending students. Principal component analysis shows that the students have a good understanding of the contents of the video, but the understanding is almost indepenent of understanding of the entire lectures. Moreover, the correlation between these subjective evaluations and the objective tests are obserbed.
