Subitizing (Instant Quantity Perception)

Say how many dots flashed on screen. Quantities of 1–4 are expected to be known without counting.

Age 5+≈ 3 minutes24 items

Run it in a quiet place on a computer or tablet, with an adult present. On timed subtests, tell the child to be "quick but careful".

Results are stored only on this device; nothing is sent to a server.