For doctors in training and medical students
An examiner for the one skill nobody marks you on.
You are examined constantly on knowledge and almost never on diagnostic reasoning itself. This is an examiner that sits you down with a case, asks for a stratified differential with evidence for and against each diagnosis, marks it privately, then questions you toward your single biggest reasoning gap — without saying whether you are right or wrong, and without handing you the diagnosis.
US$3.00 per top-up. Provided at cost — see below.
How a session runs
Work a real case
A case is drawn from the library and re-cast before you see it, so one you have met before will not read the same way twice. Every clinical value is preserved exactly. Or bring your own case.
Stratify your differential
List 2–4 most likely diagnoses ranked for this patient, the can't-miss conditions you must exclude, and any less likely alternatives. For each diagnosis, write what argues for it and what argues against it.
Be questioned, not told
Your list is marked privately against an independent review. The examiner then asks two rounds of questions toward the highest-yield gap, reflecting your patient's findings back — never saying whether you are right or wrong, and never handing you the diagnosis.
Take feedback when you are ready
After your first reply you can submit your answer at any time, or keep going through the two standard questions and any extras you opt into. The mark, examiner's note, reference differential and scoring are revealed together.
What you are marked on
Five components, shown to you in full
The mark is arithmetic, not an impression. The clinical judgements come from a deep review of the case; the score is then computed from those judgements the same way every time, and every component is broken out so you can see exactly where the marks went.
- Leading diagnosis (40)
- Your top most-likely call, or at least 25 if you named it lower on that list.
- Most likely diagnoses (30)
- An equal share for each diagnosis on the reference most-likely list.
- Can't-miss (20)
- Whether the catastrophic diagnoses made your can't-miss or most-likely list.
- Evidence for and against (5)
- Whether each diagnosis has specific supporting and refuting findings from this case.
- Stratification and discipline (5)
- A 2–4 item most-likely list, correct tiering, specificity and restraint.
Where you land
Scored against clinical seniority
- 95+Exceptional diagnostician
- 80+Consultant / specialist level
- 70+Registrar / fellow level
- 60+Junior resident level
- 50+Competent medical student
Pricing
US$3.00 a top-up, at cost
Each session commissions a genuinely deep piece of clinical reasoning, which costs real money to run. What you pay covers that reasoning and the hosting that delivers it. There is no margin on top and no cheaper way to provide analysis of this depth. A usage meter shows you exactly how much of your current top-up you have used.