[Air-L] Observational research in online discussion groups such as LinkedIn

My doctoral research is about how security management professionals are using their Personal Learning Environments for work-based learning and professional development. Prior to individual interviews and focus groups, I am doing observations in discussion groups such as LinkedIn. I would appreciate hearing if you are aware of any observational research that has been conducted in LinkedIn or similar environments. My work is qualitative, but I am also interested in quantitative or mixed methods studies. Thanks, Tony A.E. (Tony) Ratcliffe, M.Ed. PhD Researcher Institute for Learning Innovation, School of Education University of Leicester, UK (residing in Edmonton, Canada)