The interview factors greatly in the decision making process of an admissions committee. It is important, though, to remember that it is not the only factor. Prior to an interview, the admissions committee only has statistics on a piece of paper to try to deduce what type of person is behind the facts. They use the interview to see if you possess the qualities necessary to become a successful physician.
In most cases, the interview is not meant to be a pressure cooker of facts and figures. You, the interviewee, are not on trial (although you may feel like it). The committee is trying to find out what kind of person you are, what your interests are, and what your motivations are. There are a few interviewers who will want to see how you react in stressful situations. When this happens, take a deep breath and think before you speak.
Some interviewers have a standard set of questions, but many questions will come from essays submitted with your application. Be honest in your essay, because the interviewer may ask you to expand on parts of it. If you exaggerate, it may become apparent to the interviewer. Your answers may ...