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Lesson Summary. In summary, IQ stands for intelligence quotient, which is your cognitive abilities, relative to what others can do of different ages. The concept of IQ was invented in the year 1904 by Alfred Binet. The equation used to calculate a person's IQ score is Mental Age / Chronological Age x 100.
IQ scale What does the IQ scale measure? What is an average score? How high can an IQ be? Here are some answers to these and other questions. First of all, the concept of IQ was developed by either the German psychologist and philosopher Wilhelm Stern in 1912, or by Lewis Terman in 1916, depending on which sources you consult. Intelligence testing was first done on a large scale before either of these dates.