What is the point of doing the interview? To get you a campus visit. How do you do that? You have to magnetize them. How do you do that? You have to let them cathect you. What does that mean?
You need to talk less than 50% of the time.
ALWAYS say less than you think you need. Inject some SPACE into the conversation.
If they are talking more than you, you pretty much aced the interview.