CASPer vs MMI: What Australian Medical Applicants Need to Know
Getting into medical school in Australia involves a lot more than a strong ATAR. Whether you're applying as an undergrad or postgrad, selection panels weigh up academic results, standardised testing (GAMSAT or UCAT), and interview performance — and that last one carries more weight than most applicants expect, often 33–50% of your total selection score.
At that interview stage, two assessments come up again and again: CASPer and the MMI. Both are designed to test non-academic qualities like ethics, empathy, and communication — so it's easy to see why applicants often mistake one for the other. But they work through completely different formats, in different settings, and demand different preparation. Treating one like the other is one of the most common mistakes applicants make.
This guide breaks down exactly what each assessment involves, how they differ, and how to prepare for both.
What is the CASPer test?
CASPer (Computer-Based Assessment for Sampling Personal Characteristics) is an online situational judgement test — done at home, on your own computer, in a single sitting of around 90 to 110 minutes.
You're presented with a series of scenarios, either as short video clips or written prompts, and asked open-ended questions about each. Some responses are typed, others are recorded on video. Either way, timing is strict — each question has a set window, and when it closes, it closes.
The whole point of CASPer is to assess qualities that don't show up on a transcript: ethical reasoning, empathy, communication, professionalism, and how you think through competing priorities under pressure. There are no right or wrong answers — assessors aren't looking for a specific conclusion, they're looking at how you reason your way to one.
What is the MMI?
The Multiple Mini Interview (MMI) is a structured interview format used widely across Australian and international medical schools. Instead of one long sit-down with a panel, you rotate through a series of short, timed stations — usually six to ten — each testing something different.
You spend around five to eight minutes at each station before a bell signals you to move on. One station might throw an ethical dilemma at you, another might involve a role-play with an actor, and another might be a personal reflection question. Each station has its own assessor, which helps reduce individual bias and gives the panel a much more rounded picture of who you are.
MMIs can be held in person at the medical school or online via video. But regardless of the format, one thing stays constant: you're speaking aloud the whole time. Your verbal communication, presence, and ability to think on your feet are all being observed in real time — there's nowhere to hide.
CASPer vs MMI
Key Differences Between CASPer and MMI
Key Similarities Between CASPer and MMI
Despite their different formats, CASPer and the MMI share a common purpose. Both are designed to evaluate the qualities that grades and test scores cannot capture.
A few things are true of both, regardless of which one you're sitting:
- There's no single "correct" answer — how you reason matters as much as where you land.
- Ethics, empathy, and nuanced decision-making are central to both.
- Structured thinking under time pressure is non-negotiable.
- Both are ultimately trying to predict the kind of doctor you'll be, not just the student you are.
Skills Assessed in Both CASPer and MMI
The core skills being assessed are also the same: communication, empathy, ethical reasoning, problem-solving, professionalism, and self-awareness.
The difference isn't in what gets assessed — it's in how you're expected to show it. In CASPer, that means typed or recorded responses. In the MMI, it means speaking clearly and confidently in front of a live assessor. Same qualities, completely different delivery.
Which Australian Medical Schools Use CASPer vs MMI?
Not every Australian medical school uses both — and the landscape is always shifting. Here's a general overview as of 2026:
CASPer schools
MMI schools
MMI is by far the more widely adopted format across Australian medical schools, while CASPer tends to be used more selectively. That said, if you're casting a wide net across multiple institutions, there's a good chance you'll need to prepare for both. Always double-check directly with your target universities before you start prepping, as requirements can change between cycles!
How CASPer and MMI Work Together in Admissions
At schools that use both — like Curtin University and Notre Dame — CASPer and the MMI aren't interchangeable, they're sequential. They each play a distinct role at different stages of the selection process.
CASPer typically comes first, acting as a screening tool. It helps admissions teams cut down a large applicant pool to a manageable shortlist before interview invitations go out. Because it's done remotely and can be sat by thousands of applicants at once, it's a practical and cost-effective way to assess non-academic qualities early on.
The MMI then takes over as the final hurdle, reserved for shortlisted candidates who've already cleared the CASPer stage. Think of it as a two-step filter: CASPer gets you to the interview, the MMI determines whether you get an offer.
The takeaway? A strong CASPer score is necessary, but it's not enough on its own. If your target schools use both, you need to take both seriously.
How to Prepare for the CASPer Test
CASPER prep is mostly solo exercise, it’s just you, a timer, and a keyboard. The goal is to build the habit of structuring a clear, empathetic, and well-reasoned response quickly under time pressure.
What to Focus On
- Structured written responses: Practise organising your answer into a clear framework — acknowledge the situation, consider multiple perspectives, propose a course of action, and reflect on outcomes.
- Typing speed and clarity: If you're slow to type, even excellent ideas may not make it onto the screen in time. Practise typing longer responses fluently.
- Ethical frameworks: Familiarity with principles like autonomy, beneficence, non-maleficence, and justice gives you a reliable scaffold for ethical scenarios.
How to Practise
- Set a timer for three and a half minutes and write a full response to a scenario — no extensions, no going back.
- Work through sample CASPer questions and form your own answer before looking at any model responses.
- Read medical ethics case studies or even just news articles about healthcare dilemmas, and jot down a quick reflection on the competing interests at play.
- Record your video responses and watch them back — you'll spot habits you didn't know you had.
If you want to take your prep further, Fraser's CASPer Program gives you everything in one place — 4 full mock exams with solutions, an in-depth breakdown of all 9 CASPer competencies, 2 private tutorials, and access to our comprehensive ATLAS resources.
And it works — 89% of students who completed the full program in 2025 scored in the top quartile. Spots for 2026 are now open, enrol now and get immediate access to all the resources you need!
How to Prepare for the MMI
MMI prep on the other hand is the opposite, you can't do it alone — or at least, you can't do it well alone. Because your performance depends on how you come across to a live assessor in real time, you need to practise speaking aloud, getting feedback, and thinking on your feet in front of another person.
What to Focus On
- Verbal communication: Clarity, pacing, and the ability to structure a spoken argument without rambling are essential.
- Body language and confidence: Assessors observe your non-verbal cues. Eye contact, posture, and composure all register.
- Thinking aloud: In the MMI, silence can work against you. Practise narrating your reasoning process rather than arriving at a conclusion silently and then stating it.
How to Practise
- Run mock MMI sessions with peers, mentors, or a tutor — with a timer running and proper feedback afterwards.
- Practise each station type separately: ethical dilemmas, role-plays, personal reflection questions, and current affairs stations all have their own rhythm.
- When you ask for feedback, push for specifics on delivery — are you easy to follow? Do you come across as warm? Confident? Don't just ask "was that good?"
- Film yourself. You'll notice things about your body language and vocal habits that you'd never pick up otherwise.
The best way to accelerate all of this is to practise with someone who can give you real, structured feedback.
With Fraser's Interview, our Comprehensive Package includes one-on-one tutoring, general and university-specific mock MMIs, and detailed personalised feedback — so every session is moving you forward, not just going through the motions.
CASPer vs MMI Preparation: Key Differences
Common Mistakes to Avoid
A few patterns come up again and again in candidates who underperform — and most of them come down to mixing up the two formats or over-preparing in the wrong direction.
- Prepping for CASPer like it's an interview. Written responses need structure — the conversational, free-flowing style that works when you're speaking doesn't translate well on the page.
- Prepping for the MMI like it's CASPer. Scripted, memorised answers are easy to spot and uncomfortable to listen to. Assessors want to see you think, not recite.
- Leaving timing practise too late. Both assessments are time-pressured by design — that's not something you can adapt to in a week. Build it into your practice from day one.
- Being so rehearsed that you stop sounding human. Genuine warmth and engagement matter in both formats. If your answers sound polished but hollow, that registers.
- Forgetting about the other people in the scenario. Failing to consider how a situation affects different stakeholders is one of the most common weaknesses in scenario responses — and one of the easiest to fix with practise.
- Treating ethics questions like they have a right answer. They don't. Candidates who pick a side and argue it without acknowledging the complexity almost always miss the point.
Can You Prepare for Both at the Same Time?
Short answer: yes — and if you're applying to multiple schools, you probably have to.
The good news is that the core skills overlap heavily. Working through ethical scenarios for CASPer builds the same reasoning muscles you'll use in an MMI ethics station. Practising how to structure a response under pressure helps in both formats. You're not starting from scratch each time — you're just adjusting how you deliver.
That adjustment is really the main thing to be conscious of. When you practise for CASPer, type it out or record it. When you switch to MMI mode, say the same ideas aloud — and notice what changes. Spoken reasoning needs slightly different pacing, more signposting ("so the main tension here is..."), and a bit more awareness of the person sitting across from you.
The most efficient approach is to build one solid scenario-response framework and practise it in both formats. Something like: identify the core issue, consider who's affected and how, weigh up the competing values, propose a course of action, and reflect on why. On paper, that becomes your written structure. Out loud, it becomes the thread that keeps your answer from wandering.
How Fraser’s Can Help
If you want to put all of this into practice, Fraser’s Interview has you covered on both fronts. Our Comprehensive Package includes one-on-one tutoring, general and university-specific mock MMIs, and personalised feedback — everything in one place, tailored to the schools you're actually applying to. Sitting CASPer too? Our dedicated CASPer package takes care of that side of your prep.
And if you don't get an interview offer after completing the course, our pro-rata money-back guarantee means you're refunded for what you didn't use! And if you complete the course in full but aren't successful at interview, we'll support you with a complimentary mock for the next interview season. Because knowing what to do and being able to do it under pressure are two very different things — and we want to make sure you get there!
Frequently Asked Questions
Where to Next?
If you found this article helpful, don’t stop here! Fraser’s Medical has more resources to help students navigate medical school. Explore our other in-depth articles and tools to deepen your understanding, strengthen your preparation, and stay ahead in your medical journey:
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