5Gunawardena,C.,Lowe,C.& Anderson,T.(1997).Analysis of a Global Online Debate and the Development of an Interaction Analysis Model for Examining the Social Construction of Knowledge in Computer Conferencing.Journal of Educational Computing Research ,1997,17(4): 397-431.
4H. Paul Robertson (2002) interaction1: what is it, and how can I include it in online instruction[J] online interaction;2002
5Leah A. Sutton (2001), The Principle of Vicarious Interaction in Computer -Mediated Communications, International Ⅱ. of Educational Telecommunications (2001) 7(3), 223-242