The different reactions of the two groups caused researchers to conclude that it is not dancing toy animals that are an endless source of delight for infants, but rather having control. Infants kept smiling and cooing at the display because they seemed to know that they made it happen. “I did this. Isn’t it great. And I can do it again whenever I want.” The other infants, those who got the display for “free,” did not have this exhilarating experience of control.
