Cognitive, social and teaching presence in a virtual world and a text chat von Traphagan, Tomoko Watanabe, Chiang, Yueh-hui Vanessa, Chang, Hyeseung Maria, Wattanawaha, Benjaporn, Lee, Haekyung, Mayrath, Michael Charles, Woo, Jeongwon, Yoon, Hyo-Jin, Jee, Min Jung, Resta, Paul E.

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