And here's how it works. Suppose I'm the experimenter.

The experimenter says, Don't worry, I will be responsible.

And the experimenter said, If you've finished everything, go home.

He told the experimenter to do this, to try putting it out onto the other location.

There's this waiting hand from a human experimenter, and Mayday quickly figures out, apparently the human wants this.

They can have one marshmallow now. But if they wait until the experimenter comes back, they can have two.

The remote collaborator was an experimenter from our group who used one of three different technologies to interact with the participants.

A third of the people we passed it to, they shredded it, they came to us and said, Mr. Experimenter, I solved X problems. Give me X dollars.

A third of the people, when they finished shredding the piece of paper, they came to us and said, Mr Experimenter, I solved X problems. Give me X tokens.

If she has a bad run, and her score isn't good, she'll come and reach up and tap on the glass because she can't see the experimenter which is asking to have another go.

A game in which you give people money, and then, on each round of the game, they can put money into a common pot, and then the experimenter doubles what's in there, and then it's all divided among the players.

Designer John Maeda talks about his path from a Seattle tofu factory to the Rhode Island School of Design, where he became president in 2008. Maeda, a tireless experimenter and a witty observer, explores the crucial moment when design met computers.

Now, this is important, because remember, when the moment the student stood up, it made it clear to everybody that they could get away with cheating, because the experimenter said, You've finished everything. Go home, and they went with the money.