[Air-L] On methodology

Dear colleagues, I am researching on 'Trustworthiness of information shared in Twitter during disaster situations'. I am finding hard to chose a methodology to my research. Can you please share your experience or ideas to help me figure out methodology for the research? I have collected tweets from Nepal Earthquake 2015. Now, I need to find out how trustworthy are the information shared in Twitter in post-quake situations. Many thanks Bipul