Binet Intelligence Test

The Binet Intelligence Test, developed by French psychologist Alfred Binet in 1905, is a series of tasks designed to measure a person's capacity for abstraction, learning, and handling novel situations. The test's initial scoring method involved a concept called "mental age," where an individual's performance was compared to the average performance of children at different chronological ages.1234

An intelligence quotient (IQ) was derived by dividing a person's mental age by their chronological age and multiplying by 100. For instance, a 10-year-old performing at the level of an average 12-year-old would have an IQ of 120. However, the concept of mental age has largely fallen out of use, and modern IQ tests typically use statistical distributions to determine scores. Despite controversies regarding cultural bias, intelligence tests like the Stanford-Binet Intelligence Scale and Wechsler scales remain widely used.3541