The tapping game is when I tap one time, you tap two times, and when I tap two times, you tap one time. Children play this game sixteen times, mixing up the times that children are asked to tap once when the experimenter taps twice, and tap twice when the experimenter taps once. In other words, the rules of the game…
Piaget had his own way of assessing brain maturation during this period, using his now-famous "conservation" tasks, try this one out on your tour-to-eight-year-old: fill two identical short, squat glasses with equal volumes of water, and ask your child, "Do the two glasses contain the same amount of water, or does one…