As a dedicated student of the engineering discipline, the most effective way to learn is to first understand the model. All USB ports follow the uniform standard and mechanism ubiquitously, which helps people to use them repeatedly without learning every time. Racial stereotyping serves the same function that distances people from the tedious process of searching for each person's virtues and vices. In this case, people attribute numbers of idiosyncrasy to a certain group, which can have a harmful influence on the individual who belongs to this racial group and create discrimination. In contemporary United States society, Black and White are always the two extremes within the racial hierarchy. White has been idolized as the race that combines all virtues and other merits. Black, on the other hand, represents the embodiment of violence and poverty. An individual within a black group will be threatened by these stereotypes associated with his or her racial group, which may directly undermine his or her performance. For example, J. Spencer, M. Steele, and M. Quinn (1999) found that a group of men and women with equal ability in mathematics performed significantly differently after receiving stereotype threats that males are generally better at mathematics compared to females. This experiment demonstrates that stereotype threat has an impact