Memory Matrix
Memorise and repeat lit cells
About this trainer
Memory Matrix shows a grid in which some cells briefly light up, then go blank. Your job is to reproduce the pattern from memory by tapping exactly the cells that were lit. The grid grows and the patterns get denser as you go, so each round asks you to hold a little more spatial information at once.
What it develops
It trains visuospatial working memory and short-term spatial recall, the ability to hold the where of several items in mind for a few seconds. It also leans on focused attention, since one lapse while the pattern flashes loses the whole round.
History
The exercise is a digital descendant of classic spatial-span tests from neuropsychology. The grid-and-flash format was popularised for the general public by brain-training apps in the late 2000s and 2010s, with Lumosity's Memory Matrix being the best-known version and the source of the name.
Who created it — and when
There is no single inventor. The format comes straight from the Corsi block-tapping test, devised by Canadian-Italian psychologist Philip Corsi around 1972 to 1973 as a spatial counterpart to digit span and to D. O. Hebb's earlier work. The polished grid game most people know was built and named Memory Matrix by Lumos Labs (Lumosity).
How to train
Don't memorise cells one by one. Chunk the lit cells into shapes, lines and clusters, and notice diagonals or symmetry. Keep your eyes near the centre so you see the whole board at once, and silently note rough positions (top-left corner, middle row) rather than counting squares. Push the difficulty until you fail about a third of the time, that edge is where memory span actually stretches.
How long to practise
Short sessions work best: five to ten minutes, a few times a week, with full attention beats long marathons. Spatial memory tires quickly, so stop once your accuracy clearly drops rather than grinding through fatigue.
Evidence base
Evidence is strongest for exactly what you would expect, you get better at remembering grid patterns and at similar spatial-span tasks. The broader promises are far weaker: meta-analyses of working-memory training, including Melby-Lervag and Hulme's widely cited 2016 review, find little or no reliable far transfer to general intelligence, school performance or everyday memory. Lumosity itself paid a 2 million dollar settlement to the US Federal Trade Commission in 2016 over unsupported brain-training claims, so treat any boost-your-IQ or prevent-decline pitch with real caution.
Recommendations
Use it as a focused warm-up for spatial attention, not as a cure for forgetfulness, and judge progress by your own span growing over weeks, not by claims about smarter living.
FAQ
Will Memory Matrix make my memory better in real life?
It reliably improves how well you do this and similar grid tasks, but the research does not support broad gains in everyday memory or intelligence. Think of it as targeted exercise for spatial recall, not a general upgrade.
How is this different from a normal matching memory game?
Matching games (like Concentration) test which symbol is where through trial and error over many flips. Memory Matrix shows the full pattern once, then asks you to reproduce its exact positions from a single brief look, which stresses spatial working memory more directly.
What's the best way to get a higher score?
Group the lit cells into shapes and lines instead of memorising single squares, keep your gaze near the centre to take in the whole grid, and stay at a difficulty where you fail often enough to be challenged. Comfortable rounds barely train anything.
Variants
Common variations change grid size (from small 3x3 up to large boards), show several patterns in sequence, ask you to reproduce the order in which cells lit rather than just the set, add distractor flashes, or impose a time limit on your answer. Some versions fade or move the pattern to make recall harder.