When I went there were about 14 interviewees. We were split into 2 groups. First my group had one-on-one interviews for ~30 minutes in a room with the 7 other candidates also having their one-on-one interviews. We were each at separate tables with our respective interviewer. The other group had their group interview. Then we switched places.
So, our group went in for the group interview. This consisted of the 7 of us seated around a single table with 2 WVSOM faculty members. The faculty members would ask a question and then go around the table getting each person's answer. It was just like the one-on-one interview except that there were 6 other candidates and an extra faculty member listening to your answers.
Questions for both the one-on-one and group interview were the same or very similar:
Why doctoring/DO?
What are your hobbies?
What do you think about Lewisburg?
Tell me/us about yourself?
Do you have any questions for me/us?
What led you into being a doctor, is there anything specific?
That's it, it was very laid-back and not stressful at all.