Where's My Penny?

Students are being bribed to do their assignments and behave well, and the results are not very good.
A study was once conducted in which children were given paper and crayons and told that they could draw pictures if they liked. Another group of children was also provided with paper and crayons, but they were given the added incentive of receiving a penny for every picture they produced.

The children for whom drawing was its own reward continued to draw when given the opportunity. The children who had been given pennies for their art ceased to draw when they could no longer