It's 1-on-1. You have a school tour either before or after the interview depending on which group you're in. Both are short, and the interview should be rather relaxing.
Yeah there's only one interview, and it doesn't last more than 20 minutes. It's really chill but having only one interview means that you have only one shot, so don't blow it. 😀
Don't get the lady from Africa... She asked me a diversity question and i answered it based of being from Washington State... Then she goes on talking about all those embassy's (DC)... Whats sad is earlier i was talking about research at WSU... IThe interviewers will not be very prepared and will be going through your application in front of you. After the interview most people seemed to say their interviewer was not prepared.