They didn't know if they responded correctly or incorrectly after each trial because there was noreward or punishment.
因为没有奖励或惩罚,他们不知道每次试验后自己的回答是正确的还是错误的。
2
Children in this condition expected noreward, 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。
3
Some of them were encouraged with the reward of a sticker, others with the reward of verbal praise, while the remainder received noreward (a mere exposure condition).