ROANOKE, Va. — Doctors save lives, but they can sometimes be insufferable know-it-alls who bully nurses and do not listen to patients. Medical schools have traditionally done little to screen out such flawed applicants or to train them to behave better, but that is changing.

At Virginia Tech Carilion, the nation’s newest medical school, administrators decided against relying solely on grades, test scores and hourlong interviews to determine who got in. Instead, the school invited candidates to the admissions equivalent of speed-dating: nine brief interviews that forced candidates to show they had the social skills to navigate a health care system in which good communication has become critical.

The new process has enormous consequences not only for the lives of the applicants but, its backers hope, also for the entire health care system. It is called the multiple mini interview, or M.M.I., and its use is spreading. At least eight medical schools in the United States — including those at Stanford, the University of California, Los Angeles, and the University of Cincinnati — and 13 in Canada are using it.

At Virginia Tech Carilion, 26 candidates showed up on a Saturday in March and stood with their backs to the doors of 26 small rooms. When a bell sounded, the applicants spun around and read a sheet of paper taped to the door that described an ethical conundrum. Two minutes later, the bell sounded again and the applicants charged into the small rooms and found an interviewer waiting. A chorus of cheerful greetings rang out, and the doors shut. The candidates had eight minutes to discuss that room’s situation. Then they moved to the next room, the next surprise conundrum and the next interviewer, who scored each applicant with a number and sometimes a brief note.