What Is an MMI? The Multiple Mini Interview, Explained
The Multiple Mini Interview (MMI) replaced the single panel interview at many health programs with a circuit of short, timed stations. Instead of one long conversation, you rotate through several brief challenges, each scored independently.
The MMI in one paragraph
A Multiple Mini Interview is a series of short, independent stations that you move through one after another. At each, you get a prompt: a scenario to discuss, a role to act out, a question about yourself, or a task. You then have a few minutes to respond while an assessor scores you. Because each station is scored on its own by a different person, a single shaky moment does not sink your whole interview, which is one reason schools adopted the format: it is fairer and harder to game than one long conversation.
How the stations work
A typical circuit has six to ten stations. Before each one you get roughly two minutes to read the prompt and gather your thoughts, then five to eight minutes to respond. A bell or timer signals when to move on, and you rotate to the next station and a new prompt. The rhythm of read, think, deliver, reset is a skill in itself, which is why practising to time matters.
Types of stations
- Scenario / ethical: reason through a dilemma or judgement call.
- Role-play / acting: handle a situation with a trained actor who reacts to you.
- Personal: motivations, experiences, and reflection ("why medicine?").
- Policy: discuss a current issue and weigh different viewpoints.
- Task / communication: give clear instructions or solve a problem collaboratively.
What schools are assessing
The MMI is designed to reveal the qualities a transcript cannot: communication, ethical reasoning, problem-solving, empathy, and how you handle pressure. Notably, it is not testing medical knowledge. Reaching for clinical facts usually distracts from what is actually scored.
Which programs use the MMI
Pioneered at McMaster University, the MMI is now used across medicine, dentistry, physician assistant, pharmacy, and other health-professional programs in the US, Canada, the UK, and beyond. Formats vary slightly by school, but the core mechanics of timed, independent stations carry across all of them.
MMI vs traditional interview vs Casper
A traditional interview is one longer conversation with one or two people. The MMI breaks that into many short, independently scored stations. Casper is a separate, situational-judgement test taken online with written and video responses and no live interviewer. Many applicants encounter more than one of these in a single cycle, so it is worth knowing which your schools use.
The best way to understand the MMI is to feel it: try a single timed station for free and read your scored report. If you want to know what the interviewer is doing before you start, try AI-powered MMI practice explains how the follow-up questions are built.
Frequently asked questions
How long does an MMI take?
Most MMIs run about two hours, though the interview portion is often shorter once check-in and instructions are included. Each station is typically around seven to twelve minutes end to end.
How many stations are in an MMI?
Usually six to ten, depending on the school. You rotate through them one at a time, each with a fresh prompt and, often, a fresh assessor.
What's the difference between the MMI and Casper?
Both assess non-academic qualities, but the MMI is a live, spoken, in-person (or virtual) circuit of stations, while Casper is a written and video situational-judgement test you take online on your own. Some schools use one, some use both.
Do I need medical knowledge for the MMI?
Generally no. The MMI assesses communication, ethical reasoning, empathy, and problem-solving, not clinical facts. Any information a station needs is provided in the prompt.