At the end of four trials, feedback was given.
在四次试验结束的时候会给出反馈。
But unlike in the dolphin experiment, the monkeys had to complete four trials before they got any feedback.
但与海豚实验不同的是，猴子们必须完成四项实验才能得到反馈。
Four trials met the inclusion criteria, with a total of 469 participants.
有4篇试验符合我们的收录标准，其中总共包含469位参与者。
Four trials met the inclusion criteria, with a total of 469 participants.
有4篇试验符合我们的收录标准，其中总共包含469位参与者。
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