Children in this condition expected no reward, and didn't receive one.
这一情境中的孩子没有期望的奖励，也不会得到意外的惊喜。
No reward. Children in this condition expected no reward, and didn't receive one.
没有奖励。这一情境中的孩子没有期望的奖励，也不会得到意外的惊喜。
The more search, the higher the expected value of reward;
寻找越多，预期回报价值就越高；
The more search, the higher the expected value of reward;
寻找越多，预期回报价值就越高；
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