Two different IQ scales: Terman's Stanford-Binet and the Wechsler Adult Intelligence Scale-Third edition. The Standford-Binet is the best intelligence scale for predicting future academic achievement. The Wechsler scales are a group of intelligence tests which are more accurate at distinguishing between different types of intelligence.
1905: Alfred Binet (July 8, 1857 – October 18, 1911) was a French psychologist who invented the first practical intelligence test, the Binet-Simon scale. His principal goal was to identify students who needed special help in coping with the school curriculum.