Admissions assessment comparison

CASPer vs the MMI: What Transfers and What Does Not

CASPer and the multiple mini-interview both test how you reason and communicate in difficult situations, but they are different tasks. CASPer is a standardized online assessment with short typed and video response windows. An MMI is a live, school-designed station circuit. CASPer practice can sharpen your reasoning for an MMI, but it cannot replace live delivery, follow-up, role-play, or school-specific prep.

How are CASPer and the MMI different?

The main difference is standardization. Acuity publishes one current CASPer sequence and set of response timers. By contrast, an MMI is an interview method that each school adapts. McMaster's interview guidance notes that station number, timing, and task can vary by institution, so there is no single national “MMI format” to memorize.

Where does each assessment sit in admissions?

CASPer is commonly completed before interview invitations. A program may use it as a threshold, a weighted pre-interview component, or one part of holistic review. The MMI happens later and evaluates you in a live setting. Program use is not uniform: always verify the current admissions page instead of assuming that every school treats either assessment the same way.

This sequence matters. A weak application strategy is to prepare for a future interview while missing the exact CASPer test type or distribution deadline that keeps the application eligible. Start with the registration workflow, then train the assessment that occurs first.

Which CASPer skills transfer to the MMI?

The strongest transfer is not a memorized framework. It is a repeatable reasoning process that stays useful when the wording and delivery format change.

1. Identify the decision: state what must be resolved before drifting into background.
2. Map the stakeholders: include the person with less power, privacy, safety, and institutional duties.
3. Separate facts from assumptions: ask what you would clarify instead of inventing motives.
4. Balance competing values: show why empathy, fairness, autonomy, and safety may pull in different directions.
5. Choose a proportionate action: start with the least escalatory safe step and explain when escalation becomes necessary.
6. Communicate the decision: use direct, respectful language that another person could act on.

The PACE reasoning framework and CASPer answer-structure guidecan help you practise that backbone. During MMI prep, loosen the structure so the answer sounds like a conversation rather than a recited template.

A worked example: how one scenario changes across formats

Imagine a teammate altered project data to make the results look better. In CASPer, you might have 3.5 minutes to answer two typed questions. A strong response would avoid declaring fraud before checking the record, recognize the integrity and downstream safety risks, speak to the teammate privately, preserve accurate documentation, and escalate to the appropriate supervisor if the change was intentional or not corrected. The response must make those priorities visible quickly.

An MMI can use the same ethical core but change the performance task. The interviewer might ask you to role-play the conversation, then add a follow-up: “The deadline is tomorrow and your teammate says nobody will be harmed. What do you do?” You now need to listen, respond naturally, explain why urgency does not erase accuracy, and adapt without repeating your opening answer.

This is the right way to reuse preparation: transfer the quality of the judgment, then practise the new delivery task. Repeating a memorized paragraph in both formats creates a brittle answer and wastes the MMI's interactive cues.

What does not transfer from CASPer to the MMI?

CASPer does not train the full interview environment. An MMI may ask you to respond to a follow-up that challenges your first answer, interact with an actor, collaborate on a task, discuss a policy, interpret information, or explain why a particular program fits your goals. You also need to manage eye contact, listening, interruption, pacing across a longer answer, and recovery after a difficult station.

The reverse is also true. A polished eight-minute MMI answer can fail inside CASPer's short fixed timer. CASPer requires fast reading, immediate prioritization, and concise completion across both response modes. Use the current CASPer formatbefore translating any interview method into test-day practice.

Which one is harder?

Neither is universally harder. Diagnose the kind of pressure that changes your performance. If you know what you think but cannot finish inside a short timer, CASPer will expose that gap. If you write clearly but freeze when someone probes or disagrees, the MMI will expose a different gap.

How should you prepare for CASPer and the MMI?

Prepare in admissions order, then add a short overlap phase. This avoids doing two shallow programs at once and makes the transfer visible.

1. Verify requirements: list each school, exact CASPer type, deadline, and interview format from official sources.
2. Build the reasoning core: practise stakeholder mapping, uncertainty, options, and a justified action under CASPer timing.
3. Complete a full CASPer simulation: use Acuity's official practice test on your real equipment.
4. Translate aloud: take one prior scenario and answer conversationally for two minutes, then invite a follow-up.
5. Expand the MMI range: add role-play, personal, policy, teamwork, and target-school station types.
6. Run a circuit: practise switching stations and resetting after an imperfect response.

CasperCoach can support steps two and three with a timed CASPer diagnostic and feedback on typed and video responses. It is not an MMI simulator; pair it with live mocks for interview-specific delivery.

Bottom line

CASPer and the MMI reward some of the same judgment, but they create different performance problems. Build a sound reasoning process once. Then practise it under CASPer's fixed online timers and rebuild it for the MMI's live, variable, interactive stations.