How do interviewers pick candidates?

I've always wondered this. I was just interviewed not too long ago at my top school and just happened to have this thought. I know of some schools that have 20-25 interview dates each with 20-30 students interviewing a day, and they have to end up narrowing all of them down to about 100 or so ( > 150 if it's a big medical school).

My question is mainly directed towards adcoms (and current/prospective students if you have feedback): how in the world do you pick your next medical school...

How do interviewers pick candidates?

How do interviewers pick candidates?