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Estimating Learners' Subjective Impressions of the Difficulty of Course Materials by Observing Their Faces in e-Learning
Kazuaki NAKAMURA Koh KAKUSHO Masayuki MURAKAMI Michihiko MINOH
D - Abstracts of IEICE TRANSACTIONS on Information and Systems (Japanese Edition)
Publication Date: 2010/05/01
Online ISSN: 1881-0225
Print ISSN: 1880-4535
Type of Manuscript: PAPER
e-learning, quality evaluation of course materials, facial behaviors, subjective impressions of the difficulty of course materials (SIDC),
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Recently, many educational institutions have introduced e-learning to their curriculum. In e-learning, it is difficult to evaluate the quality of course materials from the viewpoint of difficulty or understandability because teachers cannot know directly learners' subjective impressions of the difficulty of the course materials (SIDC), which are mainly appeared on the learners' facial behaviors. In this paper, we aim to estimate the learners' SIDC for e-learning from the learners' facial behaviors. Based on the result of two preliminary experiments, we adopted the position/direction of the face, points of regard, and amount of mumbling as the features, which have significant correlations with the SIDC. Since the correlations depend on the learners, we differently modeled the correlations by machine learning methods for each learner. In the result of our experiment, the learners' SIDC were estimated with enough accuracy (more than 75% on an average).