“When we set children against one another in contests – from spelling bees to awards assemblies to science “fairs” (that are really contests), from dodge ball to honor rolls to prizes for the best painting or the most books read – we teach them to confuse excellence with winning, as if the only way to do something well is to outdo others. We encourage them to measure their own value in terms of how many people they’ve beaten, which is not exactly a path to mental health. We invite them to see their peers not as potential friends or collaborators but as obstacles to their own success. (Quite predictably, researchers have found that the results of competition often include aggression, cheating, envy of winners, contempt for losers, and a suspicious posture toward just about everyone.) Finally, we lead children to regard whatever they’re doing as a means to an end: The point isn’t to paint or read or design a science experiment, but to win. The act of painting, reading, or designing is thereby devalued in the child’s mind.“
Alfie Kohn, The Myth of the Spoiled Child, Chapter 4