Lewis Terman was an American psychologist best known for his work in the field of intelligence testing. He is most famous for revising the Stanford-Binet Intelligence Scale, which became one of the most widely used IQ tests. Terman's research focused on identifying and studying gifted children, leading to the long-term study known as the Genetic Studies of Genius. Born in 1877, Terman was a professor at Stanford University and contributed significantly to educational psychology. His work emphasized the importance of measuring intelligence and understanding its implications for education and society. Terman's legacy continues to influence the fields of psychology and education today.