called cross-modal transfer—they will score higher on later IQ tests than infants who can’t. In another test, measuring something researchers call visual recognition memory, infants are set in front of a checkerboard square. This is an oversimplification, but the longer the infants stare, the higher their IQ is likely to be. Sound unlikely? These measurements, taken between 2 and 8 months of age, correctly predicted IQ scores at age 18!
