@banafa1 - I’m the mom - my D wore a very plain dress to her interview. I took her to the interview location and we saw another girl leaving wearing a nice pants outfit. D said the 2 interviewers asked her about the things on her resume. D asked them if they were looking specifically for students with previous research and/or neuroscience experience and they said definitely not, that they are trying to introduce neuroscience to students who have not had any experience in the field. FWIW, when she interviewed, my D had only one very brief science-related extracurricular activity on her resume so she was definitely more of the humanities type of student.
At the end of the interview, the interviewer walked my D back out to the lobby area (I was trying to hide in a corner so as not to be noticable) and came over and shook my hand. I guess I didn’t do a great job of being unobtrusive. I did see at least one other parent who came into the lobby area with his kid to wait for the interview.
Good luck - it was a phenomenal program and I can’t overstate what a positive experience it was for my D.