Estimation of learners' mental states during the interaction between teacher and learners is very important issues for teacher from quality of learning environment point of view. In this experimental study, relationship between teacher's utterances, behaviors, learner's physiological indexes and mental states were tried to be detected by Machine Learning Method. Particularly, in this study, we tried on estimation of learner's mental states from physiological indexes considering persistent model

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... of mental states. As a results, the effectiveness of considering persistent model and time delay of physiological indexes were suggested.