P. Hill, Online Educational Delivery Models: A Descriptive View, EDUCAUSE Review, vol.47, pp.84-86, 2012.

L. Yuan and S. Powell, MOOCs and open education: Implications for higher education, 2013.

T. R. Liyanagunawardena, P. Parslow, and S. A. Williams, Dropout: MOOC Participants' Perspective, European MOOC Stakeholder Summit, pp.95-100, 2014.

J. Daniel, Making Sense of MOOCs: Musings in a maze of myth, paradox and possibility, Journal of Interactive Media in Education, vol.3, 2012.

R. F. Kizilcec and S. Halawa, Attrition and achievement gaps in online learning. Learning@ Scale, pp.57-66, 2015.

S. Mak, R. Williams, and J. Mackness, Blogs and forums as communication and learning tools in a MOOC. International Conference on Networked Learning, pp.275-285, 2010.

M. Kumar, M. Kan, B. C. Tan, and K. Ragupathi, Learning Instructor Intervention from MOOC Forums: Early Results and Issues. International Educational Data Mining Society, pp.218-225, 2015.

Z. L. Berge, The role of the online instructor/facilitator. Educational technology, pp.22-30, 1995.

F. Brouns, J. Mota, and L. Morgado, A networked learning framework for effective MOOC design: The ECO project approach, Challenges for Research into Open & Distance Learning: Doing Things Better: Doing Better Things, pp.161-171, 2014.

D. Gamage, S. Fernando, and I. Perera, Factors leading to an effective MOOC from participiants perspective, International Conference on Ubi-Media Computing, pp.230-235, 2015.

C. Sandeen, Integrating MOOCs into traditional higher education: The emerging "MOOC 3.0" era. Change: The magazine of higher learning, pp.34-39, 2013.

S. Chang and F. Tung, An empirical investigation of students' behavioural intentions to use the online learning course websites, British Journal of Educational Technology, pp.71-83, 2008.

A. M. Yousef, M. A. Chatti, U. Schroeder, and M. Wosnitza, What drives a successful MOOC? An empirical examination of criteria to assure design quality of MOOCs, International Conference on Advanced Learning Technologies, pp.44-48, 2014.

E. Soloway, M. Guzdial, and K. E. Hay, Learner-centered design: the challenge for HCI in the 21st century. Interactions, pp.36-47, 1994.

R. C. Clark and R. E. Mayer, E-learning and the science of instruction: Proven guidelines for consumers and designers of multimedia learning, 2016.

K. O'regan, Journal of Asynchronous learning networks, pp.78-92, 2003.

A. Tsironis, C. Katsanos, and M. Xenos, Comparative usability evaluation of three popular MOOC platforms. Global Engineering Education Conference (EDUCON), pp.608-612, 2016.

D. F. Onah, J. E. Sinclair, and R. Boyatt, Exploring the use of MOOC discussion forums, London International Conference on Education, pp.1-4, 2014.

D. Yang, M. Wen, A. Kumar, E. P. Xing, and C. P. Rose, Towards an integration of text and graph clustering methods as a lens for studying social interaction in MOOCs. The International Review of Research in Open and Distributed Learning, pp.215-234, 2014.

D. Yang, D. Adamson, and C. P. Rosé, Question recommendation with constraints for massive open online courses, ACM Conference on Recommender systems, pp.49-56, 2014.

M. Mazzolini and S. Maddison, Sage, guide or ghost? The effect of instructor intervention on student participation in online discussion forums, Computers & Education. pp, pp.237-253, 2003.

J. A. Baxter and J. Haycock, Roles and student identities in online large course forums: Implications for practice. International Review of Research in Open and Distributed Learning, pp.20-40, 2014.

D. F. Onah, J. Sinclair, and R. Boyatt, Dropout rates of massive open online courses: behavioural patterns. EDULEARN14 proceedings, pp.5825-5834, 2014.

R. F. Kizilcec, C. Piech, and E. Schneider, Deconstructing disengagement: analyzing learner subpopulations in massive open online courses. International conference on learning analytics and knowledge, pp.170-179, 2013.

A. Sharif and B. Magrill, Discussion forums in MOOCs, International Journal of Learning, Teaching and Educational Research, pp.119-132, 2015.

M. B. Miles, A. M. Huberman, M. A. Huberman, and M. Huberman, Qualitative data analysis: An expanded sourcebook, 1994.

J. C. Greene, V. J. Caracelli, and W. F. Graham, Toward a conceptual framework for mixedmethod evaluation designs. Educational evaluation and policy analysis, pp.255-274, 1989.

H. L. Stuckey, Three types of interviews: Qualitative research methods in social health, Journal of Social Health and Diabetes, pp.56-59, 2013.

J. Nielsen, Finding usability problems through heuristic evaluation, SIGCHI conference on Human factors in computing systems, pp.373-380, 1992.

C. Lewis, P. G. Polson, C. Wharton, and J. Rieman, Testing a walkthrough methodology for theory-based design of walk-up-and-use interfaces, SIGCHI conference on Human factors in computing systems, pp.397-404, 1990.

M. Chandrasekaran, K. Ragupathi, M. Kan, and B. Tan, Towards feasible instructor intervention in MOOC discussion forums. International Conference on Information Systems, pp.2483-2491, 2015.

A. F. Wise, Y. Cui, W. Jin, and J. Vytasek, Mining for gold: Identifying content-related MOOC discussion threads across domains through linguistic modeling. The Internet and Higher Education, pp.11-28, 2017.