TY - CHAP T1 - The Effects of Electronic Communication Support on Presence Learning Scenarios AU - Harrer, A. AU - Zeini, S. AU - Pinkwart, N. TI - Computer Supported Collaborative Learning 2005: The Next 10 Years! Proceedings of the International Conference on Computer Supported Collaborative Learning (CSCL) PY - 2005 PB - Lawrence Erlbaum Associates ER -