MMI Guide

What is an MMI?

A Multiple Mini Interview (MMI) is a structured interview format used by the majority of UK medical schools. Instead of a single extended conversation, candidates rotate through a series of short, independent stations. Each station presents a different task or scenario, and a separate assessor scores each one.

The format was designed to reduce the effect of a single interviewer's personal bias and to test a wider range of attributes than a traditional panel interview allows. Because each station is scored independently, a strong performance at one station can compensate for a weaker one.

Common station types

MMI stations vary between medical schools, but most draw from a consistent set of formats. Understanding what each type is designed to assess helps you prepare more effectively.

• Ethical scenario: a hypothetical dilemma that tests your ability to reason through competing principles. There is rarely a single correct answer.
• Role-play: a structured conversation with an actor playing a patient, colleague or member of the public. Tests communication and empathy.
• Communication task: explaining something clearly to a non-expert, or extracting information through careful questioning.
• Current affairs or NHS: questions about healthcare in the UK, recent medical developments or NHS structure.
• Motivation and insight: questions about your reasons for studying medicine and what you have learned from your experiences.
• Academic or problem-solving: a task requiring you to analyse information and reach a reasoned conclusion.

Format and timing

Most MMIs consist of six to twelve stations, each lasting between five and ten minutes. A rest station, where no assessor is present, is sometimes included. Candidates rotate on a signal, usually a bell or announcement, and have a short preparation period outside each station before entering.

Preparation time outside the door varies from one to two minutes. Use this time to read the prompt carefully, identify what the station is asking and decide on your opening approach. Arriving unprepared at the door because you spent the previous station's bell time thinking about it is a common mistake.

What assessors are looking for

MMI assessors are usually trained using a structured mark scheme. They are not looking for perfection or a specific answer, but for evidence of the qualities they are scoring: empathy, communication, reasoning, professional awareness and integrity.

Candidates who think aloud, acknowledge complexity and maintain a respectful and calm demeanour typically score well. Candidates who arrive at a definitive answer immediately, without exploring the scenario, or who become defensive when challenged, tend to score less well.

How to prepare

MMI preparation is fundamentally different from preparing for an exam. You are not building a knowledge base to recall; you are practising the application of a way of thinking under time pressure. The most effective preparation combines structured reading (medical ethics, NHS structure, current issues) with timed practice stations run aloud, ideally with another person acting as the assessor.

Use your work experience reflections as source material for motivation and insight stations. Specific, genuine examples of what you observed and what you concluded are more convincing than general statements about wanting to help people.