The discussion of stereotype leads us to focusing on the definition and the considerable dimensions. The notion of stereotype was initially recorded in Walter Lippmann’s book Public Opinion in 1922. It was employed by Walter as a pattern which cooperates people to sustain their union. The primary opinion in this book is based on that members of one group share same ideas and cognition, and “it is the insertion between man and his environment of a pseudo-environment” (p.15).
In 1933, Katz and Braly published their classic hypothetical work on the journal, connecting stereotypes with attitudes and racial prejudice. Several decades later, Allport noted stereotype “is an exaggerated belief associated with a category. Its function is to justify