How ViJEEta computes your JEE readiness score
What each number means, and — just as important — when ViJEEta refuses to show you one at all.
How is the readiness score /300 computed?
Each chapter's weight w is its measured share of past JEE Main papers — derived from a tagged bank of previous-year questions, keyed to a fixed curriculum tree. Only chapters you have covered enter the sum, and their weights are rescaled to 300: a Class-11 student five months in and a dropper in December both read readiness on the exam's own scale, for their syllabus.
How is chapter mastery measured — and guessing corrected?
Mastery is an Item-Response-Theory true score: the expected fraction of the chapter's real questions you would answer correctly, judged against each question's measured difficulty. Two corrections keep it honest: the estimate is deliberately conservative, so uncertainty lowers the claim and never raises it, and the multiple-choice guessing floor c is subtracted and rescaled — a blind 25% guess rate earns exactly zero mastery.
Why do untested chapters show “—” instead of a number?
With one observation, a Bayesian estimate is mostly its prior — the model's belief about an average student, not about you. In testing, a single wrong answer produced “23% mastery”: roughly 80% prior, 20% student. Below three answered items in a chapter, ViJEEta reports unknown. This rule can only ever lower a claim, never inflate one.
What can each kind of work prove? (the evidence ladder)
| Surface | What it can prove |
|---|---|
| Book exercises (Tatva) | Least — the worked solution is printed on the same page. |
| Practice & daily quiz | Real evidence, but unproctored and untimed, so it can only take you so far. |
| Tests, PYQ papers, mocks | Everything — exam conditions are the only evidence that can mark a chapter mastered. |
A chapter is only ever marked mastered off test performance. And the reveal-gate: open a worked solution before answering and that attempt earns nothing — it counts as reading, not as proof.
How is study velocity computed?
Your weekly plan derives a target velocity from your goal score and the days remaining to your exam; the app measures your actual velocity against it. Progress becomes a rate you can steer, not a feeling.
How are chapter priorities ranked?
Per subject (100 marks each in JEE Main), every chapter shows the marks still recoverable in it. The focus list ranks by recoverable marks — a heavy, weak chapter outranks a light, strong one automatically.
How are JEE Advanced mocks scored?
Advanced mocks use the real structure (two papers × 180), the real marking scheme including partial and negative marking, the per-subject qualifying floor, and a published marks→rank table — so a mock result answers “what rank is this?” instead of shrugging.
Does the app repeat questions? (question memory)
No. Every graded surface writes to one per-student question memory; a question you've answered correctly is retired from practice, quizzes, tests and generated mocks — unless you bookmark it to revisit. One deliberate exception: real past papers are never filtered, because a PYQ paper minus your answered questions is no longer that paper.
How does spaced revision work?
Per-chapter memory is modelled with a spaced-repetition system. When predicted retention decays toward the forgetting threshold, the chapter surfaces in your revision queue — before the exam discovers it for you.
The honesty rules, as constraints
Unknown is never rendered as zero. A revealed-solution attempt never earns ability. Every figure shown — ranks, weekly deltas, accuracies — is computed from your data or not shown at all. These aren't editorial policies; they are enforced in the scoring engine and locked by its test suite.