You're preparing for an exam and you need an honest answer. Not a practice test score. Not a gut feeling. A calibrated prediction of where you stand right now — across every dimension the exam measures — with confidence intervals that tell you how certain that prediction is. Fifteen minutes. 100+ exams. Free.
The output is a calibrated readiness assessment built from your adaptive diagnostic. You see a predicted score range, per-section breakdown with visual bars, dimensional gap analysis showing where you're strong and where you're not, and a comparison against the score distribution for your target. The uncertainty is surfaced, not hidden.
The diagnostic is adaptive — it selects items based on your responses to maximize measurement precision in the least time. No fixed-length practice test. No wasted items. Every question is chosen to reduce the uncertainty on your dimensional profile.
Select from 100+ supported exams. The engine loads the dimensional structure for that exam — how many dimensions it measures, what the scoring scale is, and the target percentile distributions. SAT, GRE, MCAT, USMLE, LSAT, CFA, CISSP, and 90+ more.
Answer items selected by the information-optimal adaptive engine. Each response updates your dimensional estimates in real time. The engine converges on your profile using between 30 and 50 items, depending on how much signal each response provides.
The multi-dimensional estimation engine computes your position on each dimension, generates confidence intervals, and maps your profile to the exam's scoring scale. Per-dimension calibrated scores with standard errors, not a single number.
Predicted score range, per-section breakdown, dimensional gaps against your target, and percentile comparison. Feeds directly into study allocation if you want to act on the gaps. Retake anytime; your profile sharpens with each diagnostic.
The readiness assessment is not a practice test with a score at the end. It is an adaptive measurement instrument that estimates your position on each dimension the exam requires. The engine is grounded in multi-dimensional adaptive measurement, enhanced with proprietary estimation methods. Per-claim validation status is published transparently.
Items calibrated across 100+ exams with known difficulty, discrimination, and dimensional loadings. Each item's parameters are estimated from response data, not assigned by hand.
Multi-dimensional adaptive measurement provides the psychometric foundation. Proprietary estimation methods handle the high-dimensional calibration at interactive speed. Sub-second updates after each response.
The adaptive item selection engine chooses the next item to maximize expected information gain across all dimensions simultaneously. 30–50 items achieve measurement precision that fixed tests need 100+ items to match.
Every prediction includes an honestly bounded confidence interval derived from the posterior distribution. The width of the interval tells you how certain the engine is — wider means less signal, not less ability.
Every claim on every result carries a validation badge: validated (confirmed against outcome data), calibrated (statistically grounded, cohort building), or theoretical (mathematically derived, not yet empirically confirmed).
Each diagnostic sharpens your profile. Prior estimates carry forward. Your second diagnostic is more precise than your first because the engine starts from a narrower prior, not a blank slate.
A 15-minute adaptive diagnostic gives you a calibrated readiness prediction. It does not answer adjacent questions that look similar but require different evidence. Four things this assessment cannot speak to, each with the outcome or explanation that would.
The readiness assessment is free for every exam. No credit card, no usage cap, no time limit. Take it once or take it every week as you prepare. Your profile sharpens with each diagnostic — every assessment feeds the calibrated item bank that makes the next one more precise.
Unlimited readiness diagnostics across all 100+ exams. Predicted score ranges with confidence intervals. Per-dimension breakdown. Percentile comparison. Profile accumulates across sessions. No paywall between you and an honest answer about where you stand.
Fifteen minutes. 100+ exams. A calibrated prediction with honest confidence intervals. Free, no credit card, retake anytime.