The College Entrance Examination Board, formed in 1902 by a consortium of Ivy League colleges, introduces the Scholastic Aptitude Test, or SAT, in which students are tested on a single set of multiple-choice questions. The SAT, developed further in the 1920s by a commission directed by Princeton University psychologist Carl Brigham, is designed to predict, along with grades, a student’s chance of success in college. Today, more than two million students take the exam each year. Along with the ACT assessment tests, SAT results are used widely by colleges to help choose which students are admitted.