College & Research Libraries has released a preprint of "Undergraduates' Use of Social Media as Information Sources."
Here's an excerpt:
Focusing on undergraduate students, a survey was conducted to investigate the following: (1) which social media platforms are used as information sources, (2) what are the main reasons for using these social media platforms for information seeking, and (3) what kinds of actions are taken to evaluate the quality of the information gained from such sources. The study provides a snapshot of current trends in terms of the use of social media as information sources. It also sheds lights on the actions that the undergraduate students took to evaluate information from social media, including social networking and video sharing sites that have rarely been studied previously.