美国心理学家霍特举过一个例子:有一天,友人弗雷德感到意气消沉。平时他应付情绪低落的办法是避不见人,直到这种心情消散为止。但这天他要和上司举行重要会议,所以决定装出一副快乐的表情。他在会议上笑容可掬,谈笑风生,装成心情偷快而又和蔼可亲的样子。令他惊奇的是,不久他发现自己果真不再抑郁不振了。弗雷德并不知道,他无意中采用了心理学研究方面的一项重要新原理:装着有某种心情, American psychologist Huotte cited an example: One day, friend Fred felt depressed. He usually deal with depressed mood is to avoid people until the mood dissipated so far. But this day he had to hold an important meeting with his boss, so decided to put on a happy look. He was smiling at the meeting, laughing and loving, pretending to be flirtatious and amiable. To his surprise, he soon found himself really depressed. Fred did not know that he inadvertently adopted an important new principle in the study of psychology: a certain mood,