In the lab, we get people to come to the lab,
sit in front of a computer screen, and we give them
little tasks that I'm going to get you to do again.
You're going to see yellow happy faces
and a few sad blue faces. These are children
in the schoolyard in Geneva during a recess
during the winter. Most kids are happy. It's actually recess.
But a few kids are sad and blue because they've forgotten their coat.
Everybody begins to move around, and your task
is to keep track of who had a coat at the beginning
and who didn't. So I'm just going to show you an example
where there is only one sad kid. It's easy because you can
actually track it with your eyes. You can track,
you can track, and then when it stops, and there is
a question mark, and I ask you, did this kid have a coat or not?
Was it yellow initially or blue?
I hear a few yellow. Good. So most of you have a brain. (Laughter)
I'm now going to ask you to do the task, but now with
a little more challenging task. There are going to be
three of them that are blue. Don't move your eyes.
Please don't move your eyes. Keep your eyes fixated