"Unlocking the Brain's Unique Approach to Processing Numbers 4 and 5"

A new study reveals that the human brain processes small numbers (up to four) and larger numbers (five and above) using different neural mechanisms. The ability to instantly recognize quantities of four or fewer—known as "subitizing"—is precise and quick, while identifying larger groups requires estimation, leading to slower and less accurate responses. This distinction could help explain certain numerical processing disorders like dyscalculia and provides insight into the cognitive processes behind number recognition. The research involved patients with epilepsy and was published in Nature Human Behavior.