How it actually works.
No black box. These are the sources, the adaptive model and the score calculation — and exactly what the test does not do. If you spot a discrepancy, let us know.
01 / OQ-29 adaptive model
The abbreviation OQ-29 (Open Questionnaire, 29 items) is the name of the core of the test — an adaptive questionnaire covering all 4 levels of the GDE Matrix: from basic manoeuvring to metacognition and driver self-reflection. The number in the name labels the method, not the question count — that adapts to your profile.
Why no fixed count? The length is a trade-off: enough items for statistically reliable tier placement (Cronbach's α ≥ 0.78), but not so many that the respondent tires — research reports significant respondent fatigue from item 35 onward. So the test branches on your profile: sections that do not apply to you are skipped.
How adaptive branching works
The test adapts in real time based on your responses. If you demonstrate strong situational awareness in the first section, subsequent questions are drawn from a harder pool — the goal is more precise placement, not a better-looking score. Conversely, a lower initial score branches the test into diagnostic questions that help pinpoint specific gaps.
The sequence is governed by a stochastic scoring model: each answer revises the estimate of your latent ability and the system selects the next question with maximum information value. The resulting score is not a sum of points — it is a posterior estimate computed over the whole sequence.
Calibration is supplemented by the reaction time test (RT test) and an optional lap time recording from track days — both serve as objective anchors for self-assessment.
02 / Theoretical basis
DriverRank is built on four methodologies validated by hundreds of studies and decades of practice. This is not a one-off quiz — every question has a reference.
System of Car Control — anticipation and planning
The foundation of advanced UK driver training. Assesses how you read a situation in advance and how you apply IPSGA (Information → Position → Speed → Gear → Acceleration). Questions measure whether you can decide before a crisis arises, not just after it has formed.
Goals for Driver Education — 4 levels of competence
A hierarchical framework dividing driving competence into 4 levels: L1 Vehicle manoeuvring → L2 Mastery of traffic situations → L3 Goals and context of driving → L4 Personal dispositions and risk acceptance. DriverRank covers all four — most standard tests stop at L2.
Smoothness, fuel economy, anticipation
Indicators of smooth driving (measured as frequency of unnecessary accelerations and brakings) and quality of anticipatory behaviour drawn from the FIA SDC scoring methodology. These form the basis of the Performance sub-scale in OQ-29.
Reaction times calibrated by age
Norms for the RT test (simple and choice reaction) by age and conditions. RT test results are not assessed in absolute terms — they are compared against the age cohort from the ADAC/DEKRA database to compensate for the natural decline in reaction time with age.
03 / Two scores + calibration
DriverRank generates three outputs: Safety score, Performance score and Calibration signal. Each axis has its own tier T1–T8 — the result is a pair, for example T6×T5, not a single number. Calibration is a standalone diagnostic output.
Anticipation, situational awareness, rule application. Basis: Roadcraft IPSGA + GDE L1–L2. Determines the tier on the safety axis.
Smoothness, efficiency, technical skill. Basis: GDE L3–L4 + FIA SDC indicators. Determines the tier on the performance axis.
The gap between your self-assessment and your actual score. Not part of the tier — it shows whether you are hard on yourself, realistic, or overconfident.
Tier T1–T8
The tier is a band on a fixed scale — not a ranking among users. We derived the boundaries from the population distribution that published research expects, then froze them: T5 means the same in two years as it does today. On that expectation the largest band is T3, T1–T2 corresponds to the bottom fifth, and T7–T8 to instructors, racing drivers and experienced police drivers.
Each new assessment is independent. You can find your result history chronologically in the History section — tiers are never overwritten; your previous result remains accessible.
04 / What the test is not
Equally important as what we measure is what we refuse to measure. Four boundaries DriverRank does not cross.
Coaching tool
DriverRank diagnoses — it does not advise. Results will show where your gaps are; what you do about that is your decision. Training recommendations are indicative, not prescriptive.
Insurance profiling tool
Your results belong to you alone. We do not sell data to insurers, employers or any third party. The anonymised benchmark pool contains no identifying information.
Legal or administrative evidence
DriverRank is not a certification and does not replace legally required examinations. The result carries no legal weight — it is a private, voluntary self-assessment.
Medical or psychological diagnosis
The RT test measures reaction time under standardised conditions — not health status, neurology or fitness to drive under applicable road traffic legislation.
A full breakdown of legal limits, yes/no scenarios and self-report bias is in the Statement of Limits.
05 / Population comparison
Your tier is a fixed band — it does not depend on how others scored. We are preparing a population comparison as a separate, additional insight; when it launches, it will not affect your result.
How the data is collected
If you consent to research use during the test, your answers and scores stay in a dataset with no link to your email. We are not computing any norms from it yet — until the sample is large enough and balanced by age and country, any comparison would be skewed.
Why you cannot see it yet
We will publish the comparison only once it is statistically meaningful — not before. Until then you get your tier and nothing invented on top. That is not a missing feature — it is statistical integrity.
What is not in the dataset
Your name or email. In an anonymous test without an email they are never there to begin with; if you delete your account, the remaining answers are detached from your identity too. Further details are in the Privacy Policy.
What you find out
After completing the test you get three concrete outputs — no flattery, no black box.
Where you stand
Your Safety and Performance tier (T1–T8) — two independent axes, not one averaged number.
Whether you see yourself realistically
The calibration Δ signal — the gap between how you rate yourself and what the test measured. Information, not judgement.
Your driver profile
An archetype — 1 of 64 tier combinations — plus your placement against the anonymised pool.
Where next
Find out where you really stand.
OQ-29 adapts to your profile — around 20 minutes on average. No registration required before the test — you receive your results immediately after completion.