2Maslow, A. (1967). Lessons from the peak experience. Journal of Humanistic Psychology. Vol. 2, spring, 9 -18.
3Csikszentmihalyi, M. & LeFevre, J. ( 1989 ). Optimal experience in work and Leisure. Journal of Personality and Social Psychology, 56(5), 815 -822.
4Holmberg, B. (1986). A discipline of distance education. Journal of distance education V. 1.1 Retrieved on February 19, 2008 from http ://cade. athabascau, ca/.
5Keegan, D. , ( 1990 ) , Foundations of Distance Education, 2nd ed. , Routledge, London.
6Anderson, T. D. & Garrison, D. R. (1998). Learning in a networked world: New Roles and responsibilities. In C. C. Gibson (Ed.) Distance Learners in Higher Education. Madison, Wis. : Atwood Pub.
7Zhang, C., & Fulford, S. (1994). Are interaction time and psycilogical interactivity the same thing in the distance learning televsion classroom? Educational Technology, 34(6), 58-64.
8Chan Tom S. , and Terence C. Ahem(1999). Targeting motivation - adapting flow theory to instructional design, Journal of Educational computing research, Vol. 21, No. 2,pp: 151 -163.
