Life / Neuroscience & Psychology

First intelligence test

Alfred Binet and Théodore Simon built a test in 1905 to find French schoolchildren who needed extra help, starting psychological testing.

Its mental-age scale was revised into the Stanford-Binet test in 1916, and Wechsler's adult scales followed in 1939. Binet warned that a score is not a fixed measure of a child's ability.