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 a coach that sits you down with a case, asks for your differential and your percentages, marks them against a rigorous independent review, and then works you through your single biggest reasoning gap by asking questions until you find it yourself.
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.
Commit to percentages
List your differential and attach a likelihood to each diagnosis. Committing to a number is what makes calibration trainable — and it is marked alongside your content.
Be marked against an independent read
The case is reviewed in depth from scratch, without sight of your answer, and your list is marked against that reference. You get a mark out of 100 and a breakdown of how it was built.
Be coached, not told
The examiner finds the single highest-yield gap in your reasoning and questions you towards it, reflecting your patient's findings back at you. The nudges get more explicit only if you need them to.
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
- Whether your top call was right, and specific enough.
- Breadth
- The share of the reasonable differential you generated, weighted by likelihood.
- Must-not-miss
- Whether the dangerous diagnoses made your list at all.
- Calibration
- How close your percentages were to defensible ones.
- Discipline
- Specificity and restraint, rather than a long list to catch the answer by accident.
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.