Are game show contestants screened for their willingness to act goofy?

Or should that be “goofily”?

Somehow this evening, we have landed on the Game Show Network for some of our evening’s television viewing. I am amazed at how giddy, silly, goofy and ridiculous these people are! I wouldn’t mind being on a game show, but I don’t think I could act like that!

Are they told by the producers to act that way? Are you as a viewer entertained by these antics?