I seriously doubt research will even be brought up, unless you say something in that regard. If your active in something, like sports or hobbies your conversation could be steered more along those lines rather than research. Really depends on the school as well. Harvard is very academically based (so I've heard) research would most likely come up.
Where as Indiana for example at least at my interview the dean of admission said you're here, to be trained as an oral health provider rather than a researcher, research is not a big deal. What was funny about his statement was he totally contradicted himself after he said that above statement when he passed out a folder with all of the information about the school and sure enough there is a huge packet of information on research being conducted at the school.
Hd