Note from Dr. Lemay:
"Regarding the “eggshells” study, I think it will be important that participants really do get the message regarding the manipulation, which is why I a) told them the message verbally; b) asked them to read over the printed page; and c) read the printed page to them. The success of the study hinges on them believing that the confederate received the information. Also, the confederate should behave in a neutral manner, not overly friendly or cold."