Human Skinner Box

Here, Michael made a room with checkerboard tiles on the floor and a button in the middle of the room kept at a table. He also made a money outlet (like the food outlet in original skinner box) from which 1 dollar bills would come out. The people (pigeons) were told that their aim is to collect as much bills as they can in 10 minutes. Michael sent them each bill after 30 seconds BUT people thought that they are causing the bills to come. For example, a woman thought that her opening and closing of the door led by pressing of the button was causing the bill to come.