What you’ll be able to do after this lesson
- Recognise the four selection formats used by imaging programmes and say what each is designed to measure
- Explain why a programme chooses an MMI over a panel, and what that tells you about how to prepare
- Adjust your preparation to the format instead of preparing generically
- Stop treating a bad five minutes as a lost application
Why the format tells you what to do
Programmes do not pick a format at random. Each one is a measuring instrument with known properties, chosen because it measures the thing that programme has decided matters. Once you know what an instrument measures, preparing for it stops being guesswork.
Two facts frame everything below. First, selection into the regulated health professions is largely values-led: the HCPC’s review of admissions across its professions found providers commonly placing values-based recruitment at the centre of decision making, with interviews — in person or virtual — typically preferred. Second, values-based recruitment means, in NHS England’s own words, recruiting people “on the basis that their individual values and behaviours align with the values of the NHS Constitution”. Every format below is an attempt to observe values and behaviour rather than to test knowledge.
Format 1 — the panel interview
Two to four interviewers, typically an academic, a clinician and sometimes a student or a service-user representative, for perhaps twenty to forty minutes, working through a set of questions and scoring against a form.
What it measures. Motivation and insight into the profession; communication; your account of your own experience; and, increasingly, values expressed through past behaviour. It is also, frankly, a test of whether you are someone the panel could imagine on placement in their partner hospitals in eighteen months.
What it does less well. A single panel has a known weakness: the whole assessment rests on a small number of raters meeting you once. In one large multi-institution study, the internal consistency of traditional two-interview processes at three medical schools ran at Cronbach’s α of 0.40, 0.44 and 0.61, against 0.68 and 0.60 at two schools using MMIs — and between-school agreement was markedly higher for the MMI schools (adjusted intraclass correlation 0.47 versus 0.27). The authors’ own conclusion was measured: traditional interviews performed better than earlier literature predicted and need not be abandoned. But the direction of the finding is the reason MMIs exist.
How to prepare. Depth. A panel will follow up, so your examples must survive three layers of “and what happened then?”. Prepare fewer, better stories.
Format 2 — the multiple mini interview (MMI)
A circuit of short stations — commonly somewhere between six and ten — each a few minutes long, each with a different interviewer and a different task, and each scored independently. You rotate on a timer.
What it measures. Deliberately, a spread of separate attributes: ethical reasoning, communication, teamwork, problem-solving, motivation, sometimes a role-play with an actor. Because each station is scored by a different person, individual rater bias is diluted — that is the point of the design, and it is what the reliability data above reflects.
Station types you may meet. A conventional question station; a scenario or ethical dilemma to talk through; a role-play with a trained actor; a task or data station (read something, respond to it); a “prioritise these” station; and occasionally a station where you are asked to critique or reflect on your own performance.
Question types. MMIs use both past-behavioural questions (“tell me about a time when…”) and situational questions (“what would you do if…”). One postgraduate study of a six-station MMI found situational questions more reliable than past-behavioural ones (G-coefficients of 0.96 and 0.87 respectively; 0.80 combined) but recommended asking both, because candidates found the behavioural format more acceptable. Prepare for both types; do not assume one style will carry you.
How to prepare. Breadth and time discipline. You cannot go deep in four minutes, so practise structuring an answer fast and finishing inside the time. And absorb this: stations are scored independently, so a bad station does not contaminate the next one — unless you carry it with you. Recovering after a poor station is a trainable skill and it is worth more marks than any extra reading.
Format 3 — the group task
Six to eight candidates, one problem, twenty minutes, and two or three assessors watching without participating. The task is often deliberately artificial — rank these items, plan this event, agree a decision — because the task is not the point.
What it measures. How you behave in a group when there is competition for airtime: whether you listen, whether you bring quieter people in, whether you build on others’ ideas or restate your own, whether you can disagree without being unpleasant, and whether the group achieved anything.
The two failure modes, both common and both fatal. Domination: talking most, interrupting, steering everything, “leading”. Assessors are not scoring leadership as volume. Disappearance: saying almost nothing and hoping to be scored for pleasantness. Silence scores zero because there is nothing to observe.
How to prepare. Practise three specific moves: summarising where the group has got to, inviting a named quieter person in, and disagreeing with a reason and a proposal attached. Two or three well-placed contributions of that kind outscore fifteen minutes of talking.
Format 4 — the situational judgement test (SJT)
A written or online test, sometimes before interview as a shortlisting tool, sometimes on the day. You are given work-relevant scenarios and asked either to rate response options or, in some formats, to answer in your own words.
What it measures. Professional judgement and values rather than knowledge — integrity, honesty, ethical reasoning, teamwork, patient-centredness. Scoring is typically against a subject-matter-expert key: in one integrity-based SJT, responses scored two, one or zero marks according to whether they matched the response of more than fifty per cent, more than twenty-five per cent, or fewer than twenty-five per cent of experts. The evidence base is reasonable — SJTs have shown predictive validity in medical education, with one recent review noting that fifteen of seventeen studies showed modest additional predictive power, typically five to ten per cent, over other selection assessments — and, importantly, SJTs show little or no redundancy with cognitive ability, which is precisely why programmes add them.
How to prepare. You cannot revise an SJT and you should not try to game it. What genuinely helps is understanding the professional standards it is built on — your regulator’s code of conduct, patient safety, confidentiality, escalation, honesty about error — and reading each scenario carefully for who is at risk and what is actually being asked. Lesson 08 and the Imaging Interview Mastery course drill the reasoning these tests reward.
In practice
Three weeks out, you have an invitation and one line of information: “selection day: MMI and group task”.
Do not start writing answers. Start with the format.
For the MMI, build a bank of six to eight short experiences, each about ninety seconds long, and practise telling each one against a timer, out loud, standing up. Then practise the recovery: deliberately mess up a station in a mock, and practise walking out, taking one breath, and arriving at the next station without carrying it. That is the single highest-value thing you can rehearse.
For the group task, get four friends and a pointless problem, run twenty minutes, and ask an observer to record only two numbers: how many seconds you spoke, and how many times you referred to something someone else said. If the first number is the highest in the room and the second is zero, you now know what to fix.
For anything unknown, email the admissions team and ask what the day contains. This is a normal question, it is not a weakness to ask it, and the answer changes your preparation completely.
Key takeaways
- Every format is an instrument chosen to measure something specific; identify the instrument first, then prepare.
- Panels reward depth and survive follow-up questions; MMIs reward breadth, structure and time discipline; group tasks reward listening and building; SJTs reward professional judgement.
- MMI stations are scored independently — a bad station is contained unless you carry it into the next one.
- In a group task, dominating and disappearing both score badly; summarising, inviting and reasoned disagreement score well.
- Ask the programme what the day contains. It is the cheapest preparation there is.
References
- HCPC. Programme advertising and admissions processes (insight from assessments) https://www.hcpc-uk.org/education/insight-from-our-assessments/programme-advertising-and-admissions-processes/
- Jerant A, Henderson MC, Griffin E, et al. Reliability of Multiple Mini-Interviews and traditional interviews within and between institutions: a study of five California medical schools. BMC Med Educ. 2017;17:190 https://doi.org/10.1186/s12909-017-1030-0
- Yamada T, Sato J, Yoshimura H, et al. Reliability and acceptability of six station multiple mini-interviews: past-behavioural versus situational questions in postgraduate medical admission. BMC Med Educ. 2017;17:57 https://doi.org/10.1186/s12909-017-0898-z
- Husbands A, Rodgerson MJ, Dowell J, Patterson F. Evaluating the validity of an integrity-based situational judgement test for medical school admissions. BMC Med Educ. 2015;15:144 https://doi.org/10.1186/s12909-015-0424-0
- St. Jean CR, Roberts MR, Alves CB, Chen F, et al. Associations between an open-response situational judgment test and performance on OSCEs and fieldwork. BMC Med Educ. 2024;24:1146 https://doi.org/10.1186/s12909-024-06071-0
- NHS England / HEE. Values based recruitment https://www.hee.nhs.uk/our-work/values-based-recruitment