Group Bourdon Test
Practice & Pass Guide
Rows of dot groups. Mark every group with exactly four dots. What this paper test measures, why it trips people up, and how to practise it.
Train Driver Tests is an independent practice platform. Our printable exercise is a practice version of the Group Bourdon concentration test used in train driver selection — it is not the official assessment, and we are not affiliated with any train operating company.
Independent practice — not the official test
Train Driver Tests is not affiliated with RSSB, any test publisher or any train company. Our questions are original practice for the abilities the assessment measures. If you're invited to an assessment, the train company will give you the official approved practice materials at least a week before your assessment date — if they haven't arrived, contact the company you applied to (RSSB candidate FAQ, Q18).
What is the Group Bourdon test?
The Group Bourdon is a classical sustained concentration test with roots in early 20th century occupational psychology. In the context of UK train driver selection, it is administered as a printed sheet containing many rows of dot groups. Each group contains either three, four, or five dots arranged in a small cluster. Your task is to work systematically through every row and mark every group that contains exactly four dots — and only those groups — as quickly and accurately as possible.
What makes the test cognitively demanding is not the complexity of the rule — counting dots is not difficult — but the requirement to apply that rule accurately hundreds of times in a row without ever losing concentration. The test is long enough that attention naturally begins to drift. Errors typically increase in the later sections of the sheet, revealing exactly where your sustained concentration breaks down under time pressure.
For a train driver, this maps directly to real operational demands. Watching signals, reading speed restriction boards, and monitoring gauges all require the application of a clear rule — repeatedly, accurately, and without error — across an entire shift. The Group Bourdon tests whether you have the mental stamina to sustain that accuracy over time, not just for the first few minutes.
Unlike the Vigilance Test or ATAVT, the Group Bourdon is typically administered on paper in a group setting rather than on a computer. This means your practice should include sitting timed runs with a printed sheet and a pen — closer to the physical conditions of the real assessment, with no digital feedback or timer display.
How to prepare
Step by step
Print and sit a timed run before your assessment
The Group Bourdon is a paper test — doing it on screen is not the same experience. Print a practice sheet, set a timer, and sit it at a desk with a pen. This builds the physical rhythm of scanning and marking that you will need on the day.
Work strictly left to right, row by row
Do not skip around the sheet. Work from left to right across each row and then move to the next. A systematic approach minimises omissions and keeps your error rate low — irregular scanning is where most mistakes creep in.
Count quickly — do not linger on each group
With practice you can learn to perceive four-dot groups as a visual pattern rather than consciously counting each dot. This speeds you up without increasing errors. Staring at a group for more than a second is a sign you are over-thinking it.
Mark clearly and keep moving — do not go back
Resist the urge to check your marks. Going back over completed rows loses time and often introduces doubt-induced errors on rows you had correct. Trust your first assessment and keep moving forward.
Practice multiple sheets to build stamina
Error rates typically increase in the later rows of the sheet as concentration fatigues. Multiple timed practice sessions train your ability to maintain accuracy all the way to the last row — not just the first half.
Check your answer key by section, not line by line
After each practice run, compare against the answer key section by section. Look for patterns in your errors — are they clustered in later rows (fatigue), distributed evenly (miscounting), or occurring on specific dot configurations (pattern blindness)? Each pattern points to a different fix.
Scoring dimensions
What your result reveals
Accuracy
The proportion of four-dot groups you correctly identified versus total groups. The primary measure of performance.
Coverage
How far through the sheet you progressed in the allotted time. Indicates processing speed alongside accuracy.
Error distribution
Where in the sheet your errors occur. Errors clustering in later rows suggest attention fatigue.
FAQ
Common questions about the Group Bourdon
What is the Group Bourdon test?
The Group Bourdon is a sustained concentration test. You are given a printed sheet containing rows of dot groups — each group contains between three and five dots. Your task is to work through every row systematically and mark every group that contains exactly four dots. It tests your ability to apply a simple rule accurately and consistently over a prolonged period without making errors.
How long does the Group Bourdon test take?
It is a timed test, but the exact time allowed in rail assessments is not published. Both speed and accuracy count, so rushing and making errors is rarely a good trade — a steady, controlled pace throughout is the safer approach.
Is the Group Bourdon done on paper or on a computer?
The traditional Group Bourdon is a paper-and-pencil test — you work through a printed sheet and mark groups with a pen or pencil. Some digital versions exist, but paper administration is most common in UK train driver assessments. Our practice version generates a printable sheet with a separate answer key.
What score do I need to pass?
Pass marks are not published. RSSB recommends pass marks, but each train company decides which ones it uses. Aim for consistent, accurate performance — a low error rate and good coverage of the sheet.
What are the most common mistakes on the Group Bourdon?
The two most common errors are miscount (marking a three-dot or five-dot group as four dots) and omission (skipping a genuine four-dot group). Both happen more frequently when candidates speed up or lose their systematic left-to-right rhythm. Fatigue in the later rows is also a common cause of errors.
Does the Group Bourdon appear in all UK train driver assessments?
The Group Bourdon is one of the attention tests in the standard train driver test battery set out in RSSB standard RIS-3751-TOM, which GB mainline train companies follow. It is a paper-and-pencil test, and the battery as a whole is a mix of paper and computer-based tests.
Can I practise the Group Bourdon test online for free?
Yes. Our platform generates unlimited randomised Group Bourdon sheets that you can work through on screen or print out, each with a separate answer key. There is no free Bourdon demo, but you can try free demos of our other tests first. Because the real test is on paper, practising both on screen and on printed sheets is the best preparation.
How can I improve my Group Bourdon test score?
Practise under timed conditions, work strictly left to right row by row, and train yourself to recognise four-dot groups as a visual pattern rather than counting each dot. Build stamina with multiple full sheets so your accuracy holds up in the later rows, where most errors happen. Reviewing where your mistakes cluster after each run tells you exactly what to fix.
The other tests in your train driver test battery
Ready to practice?
Randomly generated Group Bourdon sheets plus Vigilance, ATAVT, and TRP1 — one payment, unlimited attempts.