Reason under uncertainty,
don't memorize definitions.
BioStat Quest is a gamified biostatistics trainer for learners who want the why behind the methods — not just the right answer for a quiz.
Why this exists
Most biostatistics learning material falls into two camps: textbooks that are rigorous but dense, and short videos that are friendly but shallow. Neither teaches you to reason under uncertainty.
And that's the whole point of the subject. A clinician who can run a t-test but can't tell you when it's the wrong choice is worse off than one who's never heard of it — because the first will trust the output.
BioStat Quest is built around three things the learning-science literature consistently says actually work: active recall, clinical context, and spaced repetition.
Four things done differently
Cases, not flashcards
Each case sets up a clinical or research scenario — a manuscript to critique, a study to design, a trial to debug — then asks a sequence of questions that build on it. Methods are learned in the situations you'll actually face them.
Spaced repetition, quietly
Missed questions come back on an adaptive SM-2 schedule — the same algorithm that powers Anki. The system decides when you're about to forget something and resurfaces it, so retention compounds.
Deep dives, not dictionary entries
Every question links to an explainer: intuition, formula, assumptions, pitfalls, and suggested reading. You leave understanding why the answer is right — not just that it is.
Progress that actually means something
XP, streaks, and per-method mastery track how well you understand the material. Play as a guest or sign in (free) to sync across devices and appear on a public leaderboard if you want.
Trust, checkable
Selçuk Korkmaz, PhD
Researcher in biostatistics and applied statistical methodology. Author of several R packages on CRAN. Content is personally authored, reviewed, and method-categorized — not generated from a paraphrase of another source.
Written, tagged, tested
- 1,000+ questions across 50+ cases, routed to 42 method deep-dives.
- Every item tagged by branch, method, and misconception before it ships.
- 6,000+ automated structural tests on every change: one correct option, valid method link, valid branch, no duplicate ids.
- Corrections are reviewed and shipped fast. Every report is read.
What the deep-dives are built on
Each method links to the primary literature — Hernán & Robins for causal, VanderWeele for sensitivity, Altman for study design, Therneau & Grambsch for survival, and more. 120+ citations across the library.
Browse all sources →Content currently in beta. This page will be updated as adopters and peer feedback accumulate — we'd rather earn trust signals than claim them.
Honest answers
Is it really free?
Yes. All content is free. No ads, no paywalls, no dark patterns. If it saves you time or helps you pass an exam, share it with a colleague.
Do I need to sign in?
No. Everything works as a guest — progress saves in your browser. Sign in only if you want cross-device sync or the leaderboard.
Who is it for?
Medical students and residents studying for boards, early-career researchers brushing up methodology, and instructors assigning active-recall homework.
Can I contribute or report errors?
Absolutely — email info@biostatquest.com with corrections, topic requests, or case ideas. Every report is read.
Try a case
See the approach in action. No account needed. Takes about five minutes.