experimenter

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.

to the test with a similar experiment.So here's our cunning experimenter.He displaces the beetle,

they can put money into a common pot,then the experimenter doubles what's there,and then it's all divided among the players.

AG: Now this is his next idea.He told the experimenter to do this,to try putting it out onto the other location.

to someone who arrived late to the study.The experimenter said, "What is it with you?You arrive late, you're irresponsible.