For paediatric trainees at the start of the MRCPCH written pathway, this review tests one question: how far can you trust Pastest's AI Tutor mode on Foundation of Practice (FOP) items? Pastest offers a large, FOP-specific single-best-answer bank with human-written explanations. Tutor mode is a helpful on-demand explainer, but its source grounding is undisclosed and it is built to help while you answer — so its reasoning support and exam fidelity depend heavily on how, and when, you use it.
What Pastest offers for MRCPCH Foundation of Practice right now
Currency first. Every figure below is vendor-reported from the Pastest FOP product page and was accurate on 19 July 2026; verify before purchase.
| Item | Current state (vendor-reported, checked 19 July 2026) |
|---|---|
| FOP coverage | Yes — a dedicated MRCPCH FOP bank; a combined FOP/TAS product and separate AKP and Clinical products also exist |
| Question count | 1,396 single-best-answer questions (vendor-reported) |
| Past papers | 5 past papers from recent exams (vendor-reported) |
| Learning content | Structured explanations, expanded explanations and microlearning videos (vendor-reported) |
| AI feature | "Tutor mode" — instant, on-demand AI support while you answer; opens from a side panel; resets each question (vendor-reported) |
| Access periods | 3, 6 and 12 months, plus a 48-hour free trial (vendor-reported) |
| Price | approx. £59.99 / £99.99 / £119.99 for 3 / 6 / 12 months (vendor-reported, 19 July 2026 — verify on the product page) |
The FOP bank is FOP-specific, and the AI is the same Tutor mode found across Pastest's paediatric products. As on the AKP page, Pastest does not publish the tutor's underlying model or describe how its answers are grounded — the single most important fact for a review titled around source grounding, and the reason each of the three tests below matters.
The FOP exam anchor
Foundation of Practice is the first written stage of the MRCPCH, commonly sat alongside Theory and Science (FOP in the morning, TAS in the afternoon, on the same day if you choose). It is 100 single-best-answer questions in two hours, one paper, computer-based at an exam centre or online, with no negative marking — so you answer every item, guessing where you must. That is about 72 seconds an item. FOP assesses knowledge, understanding and clinical decision-making at the level of a trainee entering core paediatric specialist training; it leans more on foundational knowledge and reasoning than on the image-and-data interpretation that dominates AKP, though vignettes and decision-making are still the backbone. The same paper is examinable within the Diploma of Child Health, which shares FOP.
FOP draws on the whole paediatric syllabus — neonatology, cardiology, respiratory and ENT, gastroenterology, nephro-urology, neurology and neurodevelopment, endocrinology and metabolism, haematology and oncology, infection and immunology, dermatology, musculoskeletal medicine, adolescent health, emergency medicine, behavioural medicine, genetics, nutrition and palliative care — with cross-cutting safeguarding, patient safety, ethics and law, pharmacology and the science of practice. The RCPCH publishes the syllabus and official example questions; those are your fidelity reference, not any vendor's category mapping.
Testing the Tutor mode: six item types, one rubric
Judge the tutor against a written standard, not a feeling. Run six representative FOP item types through it and score each the same way.
| Probe | What it tests |
|---|---|
| Straight recall | A single-fact item |
| Diagnosis | A vignette pointing to one best diagnosis |
| Next investigation | The correct next test, not the gold-standard one |
| Management | The best next step in a UK paediatric setting |
| Ethics / safeguarding | A consent, capacity or safeguarding judgement |
| Ambiguous item | A deliberately under-specified stem |
Score each 0–2 for correctness (against a primary source), grounding (a checkable authority is named), reasoning (discriminating features are shown), restraint (uncertainty is flagged, not bluffed) and fidelity (UK paediatric context and level). This is the same rubric we apply in the standing guide to auditing an AI medical-exam tutor; reproduce it on your own subscription, because a new AI feature will drift.
Source grounding: what you can and cannot inspect
This is the heart of the review. Pastest does not disclose which model powers Tutor mode or how its answers are grounded, and the tool resets with each question, so there is no session memory to interrogate. You therefore cannot tell, from the interface alone, whether a given explanation reflects Pastest's own peer-reviewed answer, a current NICE or CKS guideline, or on-the-fly generation. The practical rule is simple: match every AI answer to a named UK authority before you trust it. For anything involving a medicine or a dose, that means the SmPC/eMC for the specific drug and the relevant NICE or CKS guidance — not a number the model has produced from memory. An explanation you cannot trace is a hypothesis, however fluent it reads.
Reasoning support: Socratic help or answer delivery?
Reasoning support is only valuable if it makes you reason. FOP items skew toward recall and single-decision judgement, so the dominant risk is subtle: the tutor confirms a guess and you file a lucky hit as knowledge. In testing, Tutor mode explained distractors well and gave clean discriminating features when asked, which is real support. But it is engineered to help "while you answer", so it will confirm and reveal readily, and it can over-agree when you push back with a confident but wrong correction. Good reasoning support, then, is something you extract by prompting — asking it to compare options and defend a ranking — rather than something the default behaviour guarantees.
Exam fidelity: does the advice fit FOP?
Three fidelity checks decide whether the tutor's help transfers to the real paper. Jurisdiction and terminology: the advice must reflect UK practice — the UK immunisation schedule, UK drug names (adrenaline, paracetamol, salbutamol), UK thresholds — not imported equivalents. Timing: the tutor is untimed while FOP gives you about 72 seconds an item, so an untutored, timed rehearsal is essential or you will train a pace you cannot use. Blueprint: the tutor optimises the single question in front of you and is blind to your distribution across domains; only your whole attempt history reveals whether a domain is under-served, which is why completion is not coverage.
Three mistakes this review is designed to stop
Most Tutor-mode misuse reduces to three errors, each mapping to a classic AI failure mode.
- Reading instead of testing. Opening the tutor before you commit to an answer is answer leakage: it swaps a diagnostic test for a comfortable read, and your percentage rises while your readiness does not.
- Trusting fluency over provenance. Overconfident wording and the occasional hallucinated citation make a wrong answer feel settled. If the tutor cannot name a current UK source, treat the claim as unverified.
- Learning the bank instead of the blueprint. Repeat accuracy climbs as recognition replaces reasoning; that is familiarity with Pastest, not command of paediatrics, and outdated guidance can slip through unnoticed if you never check against primary sources.
The three-step safe-use protocol
Neutralise all three with one order of operations. Answer first: write your option and a one-sentence rationale before the tutor opens. Interrogate second: ask it to justify, not to reveal — "Give the two features that separate the best answer from the second-best," and "What single change to the stem would flip the answer?" Verify third: confirm any management, dose or threshold against NICE, CKS, SIGN, the SmPC/eMC or the RCPCH example set before you log the item as learned. The sequence is the safeguard; run it in any other order and the tutor becomes a spoiler.
Worked example: seven days around a busy rota
A realistic week that gives Pastest one job (teaching) and iatroX another (unseen measurement), with no claims about either platform's internals.
- Monday (25 min): 20 Pastest FOP items, Tutor mode OFF; flag every miss.
- Tuesday (35 min): rework the misses with Tutor mode ON using the interrogate-second prompts; verify two claims against a primary UK source.
- Wednesday (20 min): watch one microlearning video for your weakest domain, then write three of your own recall questions.
- Thursday (35 min): a fresh 30-item Pastest set weighted to your two weakest areas.
- Friday (25 min): 20 unseen, timed iatroX items, no assistance; record first-attempt accuracy only.
- Saturday (15 min): update the misconception log; re-test five earlier misses.
- Sunday: rest, or one timed 100-item mock if the exam is within a month.
Pastest teaches; iatroX measures whether the teaching held on fresh items — the two-Q-bank rule in one week. iatroX's free UK-core banks make it a natural measurement layer that does not duplicate the Pastest questions you are already drilling.
Decision checklist: continue, supplement, switch or stop
- Continue while unseen, timed first-attempt accuracy trends up and misses concentrate in named topics.
- Supplement with an independent measurement bank when your Pastest percentage outpaces your unseen score — recognition, not mastery.
- Switch only for a demonstrated coverage gap that keeps producing errors, never for novelty.
- Stop anything that has not moved your unseen score in two honest weeks.
The bottom line
Pastest's FOP bank is a strong primary resource, and Tutor mode gives real reasoning support once you prompt for it. Its weakness is transparency: undisclosed grounding and a help-while-you-answer default mean the tool is only as safe as your protocol. Use it to learn, insist on named sources, and prove your readiness on unseen, timed items — the parts the tutor cannot do for you.
Frequently asked questions
Is Pastest enough for MRCPCH Foundation of Practice on its own? As a primary learning bank it is broadly sufficient — 1,396 FOP-specific questions with human explanations and five past papers (vendor-reported, 19 July 2026) cover the syllabus well. But sufficiency is about transfer: pair it with unseen, timed practice and the RCPCH official example questions so you can prove the knowledge holds on a fresh paper, not just on items you have already met.
Which MRCPCH Foundation of Practice component does Pastest not reproduce well? No static bank reproduces the timed, mixed, unassisted pressure of 100 items in two hours. Tutor mode is untimed and helps as you answer, which quietly trains a look-it-up habit that the real FOP forbids. Reserve some sessions for full-length, timed, tutor-off rehearsal so your pace and your recall are tested together.
How should I verify Pastest AI answers for MRCPCH Foundation of Practice? Commit to your answer first, then require the tutor to name the guideline and its date, then check that source yourself — NICE, CKS, SIGN, the SmPC/eMC for any drug or dose, or the RCPCH example questions. Treat any unsourced answer as a hypothesis until a primary reference confirms it; fluency is not provenance.
When should I stop using Pastest and move to mixed mocks? When fresh-set accuracy plateaus and your errors stop clustering, the bank has given you most of its teaching value; shift toward whole, timed, mixed mocks under exam conditions. For most candidates that transition belongs in the final three to four weeks before the diet.
How should I combine Pastest with iatroX without duplicating practice? Assign roles rather than repeat questions. Pastest is the learning bank — drilling, explanations and its AI tutor for rework; iatroX is the measurement bank — small, unseen, timed, unassisted sets read for first-attempt accuracy. That separation is the two-Q-bank rule, and it prevents you from re-testing seen items and confusing recognition with readiness.
Editorial notes and references
Written by Dr Kolawole Tytler, NHS GP and founder of iatroX. Last checked 19 July 2026; vendor-reported figures (question counts, prices, access periods and the Tutor mode description) were accurate to the Pastest FOP product page on that date and change without notice — verify the current figure on the product page before relying on it. Disclosure: iatroX operates a competing UK question bank and clinical-knowledge platform; this review confines iatroX's role to jobs Pastest does not itself claim — unseen readiness measurement and Socratic rework of missed items — and does not position iatroX as a replacement for a primary content bank. Corrections are welcome via the feedback route on iatrox.com.
References: RCPCH — Theory exams: structure and syllabi (rcpch.ac.uk/education-careers/examinations/theory/structure-syllabi) and the official FOP example questions; Pastest MRCPCH FOP (pastest.com/products/mrcpch-fop); iatroX — "Your Q-Bank Percentage Is Not Your Exam Score"; "How to audit an AI medical-exam tutor"; the two-Q-bank rule; and the iatroX comparison hub.
Open a fresh, unseen MRCPCH Foundation of Practice item in iatroX →