Welcome Asako!
Librarians play an important role in any research project. Stocking books that provide background in online research, as well as those with findings those researchers discovered, is beneficial.
Your idea, off the top of your head, is a good one. In addition to verbal questions and responses, you could use a shared whiteboard allowing the research participant to diagram or mindmap key concepts. Using the web tour, participants could show you examples of their Personal Learning Envrionments.Or, you could show one or more example (online, media, etc.) and ask them how their experiences compare and contrast with the example. I will be showing how to do use some of these approaches when we meet in Elluminate.
I hope these ideas spark your imagination!
Janet