Who is invented (intelligence quotient or IQ) IQ test?

The intelligence quotient (IQ) test was developed by French psychologist Alfred Binet in the early 20th century, specifically around 1905. Binet, along with his colleague Théodore Simon, created the Binet-Simon scale to identify children who needed special educational assistance. The concept of IQ was later popularized by Lewis Terman at Stanford University, who adapted Binet's test into what is now known as the Stanford-Binet IQ test.