If children know they will automatically get an award, what is the impetus for improvement? Why bother learning problem-solving skills, when there are never obstacles to begin with?

If I were a baseball coach, I would announce at the first meeting that there would be only three awards: Best Overall, Most Improved and Best Sportsmanship. Then I’d hand the kids a list of things they’d have to do to earn one of those trophies. They would know from the get-go that excellence, improvement, character and persistence were valued.

It’s accepted that, before punishing children, we must consider their individual levels of cognitive and emotional development. Then we monitor them, changing our approach if there’s a negative outcome. However, when it comes to rewards, people argue that kids must be treated identically: everyone must always win. That is misguided. And there are negative outcomes. Not just for specific children, but for society as a whole.

In June, an Oklahoma Little League canceled participation trophies because of a budget shortfall. A furious parent complained to a local reporter, “My children look forward to their trophy as much as playing the game.” That’s exactly the problem, says Jean Twenge, author of “Generation Me.”

Having studied recent increases in narcissism and entitlement among college students, she warns that when living rooms are filled with participation trophies, it’s part of a larger cultural message: to succeed, you just have to show up. In college, those who’ve grown up receiving endless awards do the requisite work, but don’t see the need to do it well. In the office, they still believe that attendance is all it takes to get a promotion.

In life, “you’re going to lose more often than you win, even if you’re good at something,” Ms. Twenge told me. “You’ve got to get used to that to keep going.”