Halo effect: Also known as prejudice effect, the observer makes a biased (positive or negative) valuation of a person based on the characteristics of the person, and extends this valuation to other aspects. Which of the following are not the halo effects:. ['Teacher Yang, the class teacher, hates disheveled, unkempt male students, because she always feels that such students have intellectual problems.', "Xiaoyang's family bought a Taihaier refrigerator, which feels particularly good. After that, as long as the family buys appliances, such as washing machines, air conditioners, etc. , they all buy the Haier brand.", 'Former Soviet psychologists conducted a survey of 72 people, and 9 people think that a generous forehead is a sign of honesty and honesty.', 'When going out, my mother told Xiaomin to pay attention to the pickpockets on the bus. It was Xiaomin on the bus who felt that everyone was like a pickpocket, so he held his bag tightly.']