Social level of analysis (SCLOA) is is the scientific study of how people's thoughts, feelings and thus behaviours are influences by actual, implied or imagined presence of others. Stereotypes are a sailent part of social and cultural environment. We learn them through daily interactions, conversations and through the media. To some extent based on individual experiences but cultural and social factors also play a role such as stereotypes are contextualized and not simply the results of individual cognitive processing. Stereotypes can be shared by large sociocultural groups as social representations. Katz and Braley (1933) is a specific example for stereotypes. Aim of the study is to investigated whether traditional social stereotypes has a cultural basis or not. Procedure of it is the experts asking 100 male students from Princeton University to choose five traits that characterized difference ethnic groups for example: Americans, Jews, Japanese, Negroes from a list of 84 words. The results showed considerable agreement in stereotypes, especially of negative traits. 84% of the students said that Negroes were superstitious and 79% said that Jew were shrewd. They were very positive towards their own group (ingroup bias). Since most of the students did not have any personal contact with members of the ethnic groups they had to rate, it was suggested that stereotypes are learned.