In my opinion social networks are the best way to involve participants MOOC creating learning communities in which they generate and share content provided by students of the course.
Social networks are a privileged environment, given its characteristics to promote connectivism, often forgotten feature that gives great value to this type of course.
I believe that knowledge contributed by the community is the most enriching elements of a MOOC.
MOOC In my course I have come to totally replace the forum that offered the platform for social networking (Google +) and has been a success.
Greetings and if you need more information do not hesitate to contact me and I will help as I can.
I have read many articles recognizing the social network environment as pedagogical tools. In fact social network is the nature of connectivist MOOCs (cMOOCs). cMOOcs are encouraging and supporting collaborative learning.
An article about the subject: Virtual learning environments, social media and MOOCs: key elements in the conceptualization of new scenarios in higher education: EADTU conference 2013.
I think a MOOC is better tan social network for e-learning. Usually a MOOC is managed by an excellent group of specialists in education, but a social network can be used as a tool for distance education, the difference will always be the staff that manages the site.
In our experience from the MOOCs we created at the University of Melbourne, social network learning is an integral part of the design of these courses. As the students are from a wide range of locations, and can never meet up face to face, the only place to interact and discuss course concepts is online.
While some used the discussion forums within the courses (a social network of its own) many join our Facebook (FB) groups that we have established for each of our courses. We made the groups private to give us a little control over spam and inappropriate posts.
Some of these groups have now grown to over 20,000 members and are still very active even after a MOOC has closed. It has established a community of practice that keeps the learning momentum going for the students.
I am the first to admit, that many of the FB groups have a lot of members who are not active, but this is true of discussion forums also. However, even lurking in a group, some people are reading and thinking and learning.
We have done some discourse analysis of one of the groups and are hoping that we can do more research in this area as I believe that it is a powerful compliment to the formal courses that we offer online, either in a MOOC or traditional online learning.
Social networks become a very useful tool to manage this type of course, encouraging student interaction, essential to the smooth running of the course. On the one hand to answer questions between them and the other to generate content. They are perfect to create learning communities that even last beyond the MOOC space.
Another advantage are the features of "viral" and openness, allowing to reach more students, including professionals in the field, and share all the achievements and course content, creating a major source of resources open result of the course.
I don't know if you mean existing social networks or the forming of social learning communities around a course. For the second of these, I have a recently published paper that can be of use when a globally accessible MOOC is combined with a local physical Scandinavian "study circle", which showed to be a very simple way to improve on how many students tghat finsihes a MOOC for example. We are contiuing this project path.
Article Using MOOCs at learning centers in Northern Sweden