For more interesting reading on this topic, you could read one of the thousands of psychology /social media research papers which are available free of charge via most libraries. ACM is a great source.
Fotheringham, J. and Smyth, K. (2013) Student generated content: pedagogy and practice. Social media: challenges and opportunities for education in modern society, Social Media Research Papers, Vol.1, No.1. Lithuania: Mykolo Romerio Universitetas/ISTUS (Institutional Strategies Targeting the Uptake of Social Networking in Adult Education), pp. 5-8.
Social Media Research Papers - Survey Analytics