Babies are in the period of growth and development, so before the age of 6 are called developmental quotient and not called IQ, developmental quotient, including large motor, language, fine motor and other comprehensive assessment. 15 months baby IQ high can be shown as, will take the pen to draw the vertical road, drawing vertical road length should be greater than 3cm; will hand to throw the ball to throw the ball, but not necessarily able to control the direction; to get the square blocks can be built up to four, see the round blocks and the corresponding holes Can put them into the model board correctly; can say 10 words other than “mommy” and “daddy”; can control urination and defecation during the day and no longer pee or poop their pants.