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Kang, M., Kim, S., Choi, H. & Park, S. (2007). Validating an Emotional Presence Scale to Measure Online Learners’ Engagement. In T. Bastiaens & S. Carliner (Eds.), Proceedings of E-Learn 2007--World Conference on E-Learning in Corporate, Government, Healthcare, and Higher Education (pp. 6079-6082). Quebec City, Canada: Association for the Advancement of Computing in Education (AACE).