"Masanori YAMADA,Kanji AKAHORI","Social Presence in Synchronous CMC-based Language Learning -How Does It Affect the Productive Performance and Consciousness of Learning Objectives?",,"CALL (Swets & Zeitlinger Publishers)","CALL Journal (Swets & Zeitlinger Publishers)","Vol. 20","No. 1","pp. 37-65",2007,Feb.