The herd effect refers to a kind of herd mentality. Herd mentality refers to the fact that people do not behave according to their actual situation or actual needs, but according to popular trends in society or due to the guidance or pressure of others. A psychological phenomenon of consistent direction change, herd mentality often leads to blind obedience. According to the definition, which of the following are not part of the herd effect? ['Seeing that the stock market started well this year and many of the friends around him were speculating in the stock market. Xiao Wang, who knows nothing about the stock market, thinks that he should also speculate in stocks.', 'Because art colleges and music colleges have lower admission scores for cultural courses than ordinary colleges, many junior or high school students with poor cultural foundations have shifted their focus of study, changed to art or music, and are preparing to apply for art Or music school.', 'The instructor and instructor told the soldiers that a chief would come to watch before the design exercise. As a result, most soldiers behaved abnormally during the exercise.', "Seeing that colleagues and many people on the streetwear long sweaters, Xiao Zhao also went to the mall to buy one. Because Xiao Zhao is short and fat, he doesn't look good in this dress."]