I can give you the form and ask you to rate how attractive you think I am and I can give you the same instruction with a crucial difference "Please wait here.

我给你们这张表格,对我的魅力指数打分,同样的指示，但有一点重要的差别,我对你们说“请在这儿稍等片刻。

耶鲁公开课 - 心理学导论课程节选