The TEA-OCC Test: A Complete Guide for Train Driver Candidates

What Is the TEA-OCC Test?

TEA-OCC stands for Test of Everyday Attention — Occupational. It is a standardised psychometric assessment designed to measure divided attention — your ability to process two independent streams of information at the same time without your performance on either degrading significantly.

The test was developed by researchers in occupational psychology and is used across a range of safety-critical selection processes, including train driver recruitment at certain UK operators. It appears in the OPC battery alongside the Vigilance Test, ATAVT, TRP1, and Group Bourdon — but it is distinct in that it tests a specific cognitive skill that the other four tests do not directly measure.

Where the Vigilance Test measures your ability to maintain attention on a single stimulus over a long period, and the ATAVT measures the speed and accuracy of your visual scene processing, the TEA-OCC targets something different: what happens to your performance when you have to split your cognitive resources across two concurrent tasks. That degradation — or the absence of it — is exactly what assessors are measuring.

How the Three Parts Work

The TEA-OCC is structured in three progressive parts, each building on the previous one. You complete them in sequence, and your score in Part 3 is interpreted in the context of your Part 1 and Part 2 baselines.

Part 1 is the auditory task. You listen to a sequence of tones — a low, round beat and a high, sharp ping — played at irregular intervals. Your job is to silently count the low tones while ignoring the high ones. At the end of the sequence, you enter your count. This part establishes your baseline auditory attention performance with no competing demands.

Part 2 is the visual task. A column of rows appears on screen. Each row contains two symbols chosen from a set of six shapes. You have 45 seconds to click every row where both symbols match. Your score reflects both how many correct matches you found (hits) and how many non-matches you incorrectly clicked (false alarms). This part establishes your baseline visual attention performance.

Part 3 is where the test becomes genuinely demanding. The visual symbol task runs simultaneously with the auditory tone sequence. You must click the matching rows and count the low tones at the same time. Neither task pauses for the other. Your Part 3 performance is then compared against your Part 1 and Part 2 baselines to produce a divided attention score — essentially, how much your performance drops when both tasks compete for your cognitive resources.

Why Divided Attention Matters for Train Drivers

Divided attention is not an abstract cognitive concept — it is a daily operational requirement for train drivers. Reading a signal while monitoring the speedometer. Tracking the line ahead while processing a radio message. Watching for a platform starting signal while checking the cab display. These are all real situations that require the same fundamental capacity that the TEA-OCC is measuring.

Most people can handle two tasks simultaneously if one of them is simple and well-practised enough to be nearly automatic. What the TEA-OCC tests is whether you can maintain acceptable performance on both tasks even when neither is automatic — which is the condition you face when you are still a trainee, still learning your routes and your traction.

Candidates who score poorly on Part 3 relative to their Part 1 and Part 2 baselines are showing that their performance degrades significantly under dual-task conditions. That is the key signal the assessment is designed to detect.

How the TEA-OCC Is Scored

Each part is scored independently. In the auditory parts, your count is compared against the actual number of low tones in the sequence — accuracy is the primary measure. A count that is exactly right scores full marks; counts further from the true total score progressively lower.

In the visual parts, two values are recorded: hits (correct matches you identified) and false alarms (non-matches you incorrectly clicked). A high hits score with low false alarms is the ideal profile. Rushing through the rows and clicking uncertain pairs tends to increase false alarms without proportionately improving hits.

Part 3 is the most diagnostically significant. Your combined score in Part 3 is compared against what you scored in Parts 1 and 2 separately. If your Part 3 auditory accuracy drops sharply relative to Part 1, and your visual hits fall relative to Part 2, you are showing a large divided attention deficit. If your Part 3 performance closely matches your individual baselines, your divided attention capacity is strong.

In practice, some performance degradation in Part 3 is normal and expected — the question is how much. The scoring accounts for this, and candidates are not penalised simply for finding Part 3 harder. What matters is whether the degradation falls within the acceptable range for the role.

How to Prepare Effectively

The most important principle: do not go straight to Part 3. Many candidates try to practise the combined task before they have mastered each component individually, which makes the dual-task much harder and less useful as practice. Work through Part 1 and Part 2 separately until your performance on each is consistent and feels close to automatic. Only then introduce the combined version.

For the auditory task (Part 1), the goal is to make tone-counting so reliable that it requires minimal conscious effort. This frees cognitive capacity for the visual task when Part 3 arrives. Practise the auditory component until you can count accurately without losing your place, even when distracted. Use headphones in a quiet room — the distinction between the low and high tones needs to be clear.

For the visual task (Part 2), develop a consistent left-to-right scanning rhythm rather than examining each row exhaustively. You have 45 seconds and a fixed number of rows — a steady rhythm produces more hits than fixating on ambiguous pairs. Accept some uncertainty and keep moving: a false alarm costs less than missed hits.

In Part 3, most people find it easier to anchor on the visual scanning task as their primary focus and run the tone count as a background process. Trying to give exactly equal attention to both tasks typically degrades both. Experiment with anchoring during practice to find the approach that works for you.

Beyond technique, the improvement from practice comes from familiarity reducing cognitive load. The more automatic each component becomes, the more capacity you have for the other. This is why completing multiple full three-part sessions — rather than focusing on a single component — is the most effective way to close the gap between your individual and combined scores.

Who Faces the TEA-OCC?

Not every UK train operating company includes the TEA-OCC in their standard OPC battery. The four core tests — Vigilance, ATAVT, TRP1, and Group Bourdon — are close to universal. The TEA-OCC appears at certain operators where divided attention has been identified as a particularly important criterion for the specific driving environment and fleet.

Check your operator's assessment information page, or the OPC centre's candidate guidance, to confirm whether the TEA-OCC is included in your specific assessment. If you are unsure, it is better to prepare for it than to be caught off guard. The time cost of practising a test you might not face is low; the cost of facing it unprepared is potentially your assessment place.

Our Premium plan includes full access to the TEA-OCC Beats and Symbols test alongside the four core tests, with unlimited attempts and full score breakdowns after each session.