The commonest way to use a question bank for PLAB 1 is also the least efficient: open it, answer whatever comes up, read the explanation, repeat until the exam. It feels like work and it produces a rising percentage, which is exactly why it is so seductive. But PLAB 1 is a 180-question paper sat in three hours, mapped to the same content map that underpins the UK Medical Licensing Assessment, and it rewards three distinct capabilities that need to be built in sequence rather than simultaneously. Here is a three-stage structure that does more with the same hours.
Key takeaways
- Stage 1 is coverage: prove you have sampled the whole content map, not just your comfortable subjects.
- Stage 2 is UK calibration: fix the errors caused by practice differences rather than knowledge gaps.
- Stage 3 is simulation: build pacing and stamina under genuine exam conditions.
- Run the stages in order, because adaptive practice on an incomplete baseline just amplifies your blind spots.
- Reserve official GMC sample questions for calibration, not for repeated memorisation.
Stage 1: coverage, in Standard mode
The first job is not improvement, it is measurement. Before an adaptive engine can usefully target your weaknesses, it needs to know where they are, and it cannot know that about a domain you have never attempted. So the first stage is deliberately broad: work in Standard mode across the full breadth of the content map, sampling every major presentation and system rather than following interest or comfort.
The output you want from this stage is not a percentage. It is a coverage map with two separate columns: accuracy, and exposure. A domain where you scored 40 per cent across thirty questions is a known weakness. A domain where you have answered four questions is not a strength, it is an unknown, and unknowns are where exam-day surprises come from. Most candidates discover that their apparent weak areas are simply the areas they have sampled, and that entire domains are sitting unexamined.
Stage 2: UK calibration, in Adaptive mode
With a genuine baseline established, the second stage is remediation, and this is where an adaptive engine earns its place: it can now return you to the domains where you are actually weak rather than the ones you think you are.
But for PLAB 1 specifically, remediation has a particular flavour, because a large share of IMG errors are not knowledge gaps at all. They are UK-practice gaps, where you knew the medicine and applied the rule from the system you trained in. Referral thresholds, prescribing choices, safeguarding, consent and screening are all determined by the health system rather than the disease, and they have to be learned rather than inferred. Tag those errors separately, review them against the UK source, and re-test the principle in a different clinical setting to prove it has transferred. We set out the full method in the PLAB 1 UK-practice gap.
Alongside adaptive remediation, this is the stage to run spaced repetition on the material that decays fastest: thresholds, contraindications, statutory duties and public-health rules. These are exactly the facts that feel secure the day you learn them and evaporate three weeks later.
Stage 3: simulation, in timed mixed blocks
The third stage is about the exam rather than the medicine. PLAB 1 gives you three hours for 180 questions, which is one minute per question, and that constraint changes how you must read a stem. Candidates who have only ever worked untimed, one question at a time with the explanation open, routinely find their accuracy collapses under exam conditions, not because they know less but because they have never practised deciding quickly.
So in the final phase, shift to timed, mixed blocks that mirror the real paper: no topic filtering, no explanations until the block is done, and full-length runs at least twice before the exam. Track two things separately, accuracy and speed, and look specifically at whether your accuracy drops in the last third of a block, which is a stamina problem rather than a knowledge problem and needs a different fix.
Where the official sample questions fit
The GMC publishes sample PLAB 1 questions, and they are the single best guide to the style and cognitive level the exam actually uses. Use them as calibration, not as content: sit them under realistic timing, before you have seen the answers, and compare the wording and the reasoning demanded against your commercial question practice. If your bank feels markedly easier or markedly more obscure than the official samples, adjust your expectations accordingly. What you should not do is work through them repeatedly until you have memorised them, which converts your best calibration instrument into a set of remembered answers and tells you nothing.
Where iatroX fits
iatroX's PLAB 1 bank supports all three stages within one system: Standard mode for the coverage audit, an adaptive engine that targets the weak domains that audit exposes, spaced repetition for the thresholds and rules that decay, and timed mock exams at the real question count and time limit for the simulation phase. Explanations are grounded in NICE, CKS, SIGN and the SmPC, so the UK rule sits alongside the question, and missed questions can be opened in the Socratic Tutor, which asks you to reason before it explains. Try it with free sample questions at iatroX.
Frequently asked questions
How many questions should I do before PLAB 1? Volume matters less than structure. A candidate who has covered the whole content map, remediated their weak domains, and sat two full-length timed papers is better prepared than one who has answered twice as many questions in their favourite subjects.
Should I use adaptive mode from the start? No. Adaptive practice on an incomplete baseline just amplifies your blind spots, because the engine can only target what it has seen. Establish representative coverage in Standard mode first, then switch.
When should I start timed practice for PLAB 1? Once your coverage is representative and your major weak domains have been remediated, typically in the final four to six weeks. Sitting timed papers too early measures your pacing before your knowledge is stable, which is discouraging and uninformative.
How should I use the GMC sample questions? Under realistic timing, before reading the answers, as a calibration of style and difficulty rather than as content to memorise. Preserve them for periodic benchmarking rather than working through them repeatedly.