FTP name this quantity, originally computed as mental age over chronological age multiplied by 100.
It was suggested in 1911 by German psychologist William Stern, and was adopted by Lewis Terman at Stanford in 1916.  Although it has recently fallen into disrepute and is often replaced by Leon Rosenberg's Johns Hopkins Perceptual Test, many tests are still adjusted to yield this score, which follows a normal distribution.  FTP name this quantity, originally computed as mental age over chronological age multiplied by 100.
It was suggested in 1911 by German psychologist William Stern, and was adopted by Lewis Terman at Stanford in 1916.  
Intelligence Quotient