Assessing the Use of Social Media in Massive Open Online Courses
  The study explores whether the use of Twitter in Massive Open Online Courses (MOOCs) promotes the interaction among learners. The social network analysis shows that instructors still play a very central role in the social media communication and the communication network between students shrinking over time. The mere use of social media fails to promote learner-learner interaction. More research is needed for understanding learner motivation and how instructional design can help increase their engagement and participation. 
Suhang Jiang, Dimitrios Kotzias
cs.CY cs.SI