Why Kids Play Nice with Their Schoolmates

Did you know that kids are more likely to share their toys or help each other out if they go to the same school? Scientists did an experiment with kids from fourth, sixth, and eighth grades to see if they'd cooperate more with classmates or kids from other schools. They found that younger kids, like fourth and sixth graders, were more likely to play nice with their schoolmates. This isn't just about being friends; it's about having expectations that schoolmates will also cooperate. Older kids, like eighth graders, didn't show this preference as much.

In another part of the experiment, kids could punish others for not cooperating. Again, younger kids were easier on their classmates who didn't play by the rules. Eighth graders were fairer, punishing both classmates and others equally. This shows that as kids grow older, they start to treat everyone the same, which is a big step in understanding rules and fairness.

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