Your friends Bernie and Miriam have a 6-month-old daughter, Rachel. Rachel was tested using the Bayley Scales of Infant Development and she received a very high score

Bernie and Miriam are convinced that this means Rachel will be gifted when she is older. What can you tell your friends about the relation between infant intelligence test scores and later IQ that might contradict their beliefs?
What will be an ideal response?

A good answer will be similar to the following:
You can tell Bernie and Miriam that, in general, scores from infant intelligence tests such as the Bayley Scales are not related to later IQ scores. Children must be at least 18 to 24 months old before the scores from infant tests can predict later IQ scores. The reason for this is that infant tests place more emphasis on sensorimotor skills and later tests emphasize cognitive processes, such as language, thinking, and problem solving. A high score on the Bayley Scales should reassure Bernie and Miriam that Rachel is developing normally but it should not lead them to believe that Rachel will be gifted later in life.