An intelligent quotient which is most commonly known as IQ is a score which is derived from various different standardized tests trying to measure intelligence. This term was first coined by the German psychologist named William Stern in the year 1912. In this method, "mental age" is divided by the "chronological age", resulting in the aforementioned ratio. (Richardson, 2002)Although the term is commonly used CI to refer to the result of an intelligence test, the scores of the tests used today as the Wechsler Adult Intelligence Scale, is based on the projection of the measured range of the ...