What Is Neuro Lab? The Classic Experiments Behind Our Free Brain Tests

Neuro Lab is the free corner of Reflex & Focus: 16 short tests you can play in a browser, on a phone or a laptop, without an account. Each one takes between one and fifteen minutes and ends with a score. Your results stay in your own browser.

None of the ideas are new, and that is the point. Every test is our own version of a task that psychologists have used for decades to study how attention and memory work. This article explains where they come from and how to read your score honestly.

Tests built on famous experiments

Colour–Word is based on the Stroop task from 1935. John Ridley Stroop showed that naming the ink colour of a word is slower when the word spells a different colour. Reading is so automatic that you have to hold it back, and that holding back takes time.

Multi-Target Tracking comes from multiple object tracking, introduced by Zenon Pylyshyn and Ron Storm in 1988. You watch several identical dots, a few of them marked, and keep track of the marked ones while everything moves. Many people manage around four before mistakes creep in.

Tower Puzzle follows the Tower of London, which Tim Shallice described in 1982 to study planning: reach a goal pattern in as few moves as possible, which rewards thinking ahead over moving fast.

Hidden Order is inspired by a 2007 study by Sana Inoue and Tetsuro Matsuzawa, in which young chimpanzees recalled briefly shown numbers remarkably well. Light Sequence and Digit Span test how much you can hold in mind for a few seconds, an idea measured by memory researchers for more than a century. Reaction Time and the choice-based tasks connect to the work of William Hick in 1952, who showed that responses slow down as the number of possible choices grows.

What your score means

A Neuro Lab score tells you how you did on that test, today, on that device. It is useful for comparing yourself with yourself: same device, same distance from the screen, similar time of day.

Scores shift with sleep, mood, practice and even the screen you use. A phone with touch input and a laptop with a mouse can give quite different reaction times, so compare like with like.

What it cannot tell you

These are not medical tests, IQ tests or a measure of your brain. They are games built on lab tasks. Getting better with practice is normal and real, but that improvement is mostly on the test itself. Large reviews of brain-training research found good evidence that people improve on the tasks they practise, and much weaker evidence that the gains carry over to everyday skills such as work, study or driving.

Not medical advice. If you have concerns about your memory, attention or vision, speak to a doctor or the right specialist.

Always something new

Every two weeks we add a new test. Every couple of months we refresh the lab with new levels and tasks, and some tests make way for new ones. Each test card has a Learn more button that opens the full story behind that test.

The short version

Neuro Lab is 16 free tests based on classic psychology experiments. Play for fun, compare against your own past scores, and read the story behind each task. Treat the score as a snapshot of today, not a verdict on your brain.