How to pass the AMC CAT MCQ: preparation in three stages

What you are preparing for

The CAT MCQ is a single computer adaptive exam of 150 multiple-choice questions over 3 hours 30 minutes, each with five options and one correct response, spread across six patient groups. It is set at the level expected of new graduates of Australian medical schools about to begin intern training. Each question must be answered before the next is shown, with no going back. The exam format guide sets out the structure in full, and the guide to CAT MCQ eligibility and the application steps covers the paperwork, which can run alongside preparation.

That description already implies the shape of preparation. Breadth matters more than depth in any one specialty, Australian guidance matters more than the practice you trained under and decisions under time matter more than recognition.

Stage one: establish a baseline

Start by finding out where you stand across the blueprint rather than where you assume you stand. The AMC's six patient groups are adult health (medicine) at 30% of the exam, adult health (surgery) at 20%, and women's health, child health, mental health, and population health and ethics at 12.5% each. A short assessment sampled across all six will usually contradict at least one assumption.

The result to look for is the ranking of groups, read against the weight each carries in the blueprint, more than the overall percentage. A weak group that carries little weight is a smaller problem than a middling group that carries a great deal.

The free diagnostic samples every patient group and gives a first read on every subject, with an explanation for every question.

Stage two: close the gaps, weighted

Work through the patient groups in order of weight multiplied by weakness, rather than in the order a textbook lists them. Adult medicine and adult surgery together make up half the exam, so a gap there costs more than an equivalent gap in a smaller group.

For each topic, three things are worth doing in this order.

1. Read the Australian guidance for the common conditions rather than a general textbook chapter. Antibiotic choice, imaging thresholds, screening intervals, immunisation schedules and referral pathways are where candidates trained elsewhere lose marks, and these are national decisions.
2. Reduce each topic to short, recallable principles. "Which patients with this presentation need imaging, and which do not" is examinable. Three pages of prose is not.
3. Answer questions on the topic immediately, while it is fresh, and review every option.

Keep a written record of principles as you go. The record should be short enough to reread in the last fortnight.

Stage three: rehearse

In the final phase, shift the balance from learning to performing. Mixed sets under time replace single-topic sets, because the exam randomises questions across the blueprint and switching between specialties without warning is a specific demand. Full-length timed mocks come in last, to test whether accuracy holds across three and a half hours.

Three habits are worth building deliberately.

• A fixed per-question pace. About 84 seconds, with a decision at the end of it. Practise committing to an answer on a question you cannot resolve.
• Finishing all 150. The AMC expects every question to be completed, and not completing them can produce a fail with insufficient data to obtain a result. There is no negative marking.
• Ignoring perceived difficulty. In an adaptive exam, a correct answer is followed by a more difficult question, so hard questions do not mean you are failing. The pass mark page explains how the 0 to 500 score and the 250 pass work.

Leaving the first full-length mock until the last week is one of the patterns below that cost candidates marks.

Ten patterns that cost marks

A candidate who fails the CAT MCQ rarely fails because of a single topic. Marks are lost in a pattern repeated across the exam, and a pattern corrected improves every patient group at once.

1. Answering from another health system. The reasoning is sound and the answer is correct where the candidate trained, but it is not what is done in Australia. It shows most in antibiotic choice, imaging thresholds, immunisation schedules, screening programs, referral pathways and what is managed in general practice rather than in hospital. Read Australian guidance for the common conditions and note where it differs from what you were taught.
2. Uneven coverage of the patient groups. Candidates revise what they enjoy, and an exam randomised across all six groups finds the one never properly covered, often mental health or population health and ethics. Give every group scheduled time, by weight and weakness.
3. Answering a different question from the one asked. The lead-in asks for the most appropriate next investigation and the candidate chooses the definitive treatment, or it asks for the most likely diagnosis and the candidate chooses the most serious one to exclude. Read the lead-in before the options, and again before confirming.
4. Pacing that collapses in the final hour. Accuracy over the first hour says little about accuracy over the fourth. Sit full-length timed mocks early enough to act on what they show. A sharp fall in the last quarter is a stamina problem, and stamina is trainable.
5. Spending too long on hard questions. Three minutes on one question takes the time of another and rarely produces a correct answer. Hold to the budget of about 84 seconds, choose between the two remaining options and move on.
6. Reading difficulty as failure. A candidate performing well finds much of an adaptive exam hard. Knowing this before the day prevents the anxiety that costs more marks than the difficulty does.
7. Practising volume without review. Large volumes with brief review build familiarity with question wording rather than reasoning. Review all five options of every question and record the principle that decided it.
8. Relying on recall questions. Compilations of remembered questions are often inaccurate and out of date, and they train recognition of specific items. The AMC prohibits recording, disclosing or selling exam content and may withhold a result that analysis suggests reflects prior knowledge of questions. The page on AMC recalls sets out what the AMC says.
9. Booking a date the preparation does not support. An underprepared sitting costs another A$2,920 authorisation and lengthens the timeline, because the AMC does not accept a new application until the previous results are out. Work backwards from the date, as described below.
10. Not finishing all 150 questions. Not completing them can produce a fail with insufficient data to obtain a result, and there is no negative marking. Decide every question when it appears and check the on-screen timer at fixed points.

Working out the time you need

There is no single answer, and averages are unhelpful because the starting points differ so widely. The variables that matter are how recently you practised, how close your training system's practice is to Australian practice and how many hours a week you can commit.

A more reliable method is to work backwards. Count the weeks to your exam window, multiply by the hours you can commit in an ordinary week rather than a good one and allocate those hours across the patient groups by weight and weakness. If the arithmetic does not cover the ground, the honest options are more hours a week or a later window. The study plan guide sets out that calculation with worked timelines, and the AMC CAT MCQ dates page counts the weeks to each window.

Around clinical work and in the final fortnight

The study plan guide covers fitting preparation around a clinical roster and what to do in the last two weeks, and the exam day guide covers the arrangements for the day itself.