" Contingent on what, though? Some bases for feeling good about oneself may be worse than others. Jennifer Crocker, a psychologist at Ohio State University, and her colleagues have shown that the prognosis is particularly bad when self-esteem hinges on outdoing others (competitive success), approval by others, physical appearance, or academic achievement.47 Consider the last of those. When children’s self-esteem rises or falls with how well they do at school, achievement can resemble an addiction, “requiring ever greater success to avoid feelings of worthlessness.” And if it looks as though success is unlikely, kids may “disengage from the task, deciding it doesn’t matter, rather than suffer the loss of self-esteem that accompanies failure. "

― Alfie Kohn , The Myth of the Spoiled Child: Coddled Kids, Helicopter Parents, and Other Phony Crises