公众知觉偏见是由于人们的认知和思维具有一种惯性和倾向性,在感知事物的时候,容易按照一种固定了的倾向去认识事物,判断事物,思考问题,表现出心理活动的趋向性和专注性。知觉偏见一般由三个方面的原因导致而成。一,首因效应。首因效应也就是我们平常所说的第一印象。实验证明,最先给人刺激的事物,留在人心中的印象也最深刻,第一印象一旦形成,难以随着时间的推移而消 Public perception bias is due to people’s cognition and thinking has a kind of inertia and tendencies, when the perception of things, easy to follow a fixed tendency to recognize things, to judge things, to think about the problem, showing the trend of psychological activity And focused. Perceptions prejudices generally result from three reasons. First, the first effect. The first cause effect is what we usually call the first impression. Experiments show that the first to give people exciting things, the impression left in the hearts of the most profound, the first impression once formed, it is difficult to eliminate over time