
Walter Mischel started thinking about this experiment when he was in graduate school. Later, in the 60’s at Stanford, he devised what's become known as the Marshmallow Experiment, to assess the ability of children to delay gratification.
Since then, 50 years of in depth research have both enhanced and expanded the scope and knowledge that began with this simple experiment. After all these years, Mischel has written about it in The Marshmallow Test: Mastering Self-Control
My conversation with Walter Mischel: