was when do children-- in that video when were the--

刚才的问题是
what were the ages of the children

在影片中失败和通过任务的儿童
who failed and who passed?

他们的年龄有多大
Yes.

请讲
The question of

这个问题是
whether discriminant conditioning has been used with babies

在探究婴儿拥有什么类型的概念时
to explore what sort of concepts they have.

是否对婴儿应用了判别式条件作用
I don't know. Does anybody--It has been--

我不是很清楚
The colleague answered and said

有同事回答说
that it's not as effective as other methods.

这种方法并不如其他方法有效
Part of the problem with using operant conditioning with babies

应用操作性条件作用的部分问题在于
is it's difficult to get them to behave in any systematic way.

很难使婴儿们按照系统的方式行动