We're going to talk a little bit about that regarding babies.

我们会谈谈与婴儿有关的研究方法
I'll give you another example from a very different domain.

我给大家再举一个不同方面的例子
There was a set of scientists interested in studying tickling.

很多科学家对研究挠痒痒非常感兴趣
So, when you tickle somebody,

在什么情况下
under what circumstances will they laugh?

你挠别人痒痒他们会发笑
Where do you have to tickle them? Can you tickle yourself?

要挠哪里才行你挠自己会感到痒吗
Does it have to be a surprise, and so on?

需要出其不意吗等等
It turns out very difficult to study this in a lab.

事实证明很难对此进行实验室研究
You're not going to have your experimental credit.

你又不能靠傻笑来得到你的实验学分
You come into the lab and say,

你走进实验室说
"Okay. I'm the graduate student. Ha, ha, ha."

"我是研究生然后傻笑"
And in fact,

实际上