The Marshmallow Test:
The marshmallow experiment is a famous test of this concept conducted by Walter Mischel In the 1960s, a group of four-year olds were given a marshmallow and promised another, only if they could wait 20 minutes before eating the first one. Some children could wait and others could not. The researchers then followed the progress of each child into adolescence, and demonstrated that those with the ability to wait were better adjusted and more dependable (determined via surveys of their parents and teachers), and scored an average of 210 points higher on the Scholastic Aptitude Test.
Yesterday I tried the marshmallow test on Abigail. I told her that she could have 1 marshmallow but if she could wait 15 minutes she could eat two...Her response..."If I wait till after my show can I have five?"