Cognitive components stereotyping: beliefs about a typical traits or characteristics or values that you will associate with group members. Behavioral component discrimination: unjustified negative or harmful action toward a member of a group simply because of his or her membership in that group. These all apply only to when you apply something to group membership alone. Stereotypes across time: people have stereotyped across history. Princeton trilogy: at princeton collected racial stereotypes of 100 students. There was a high degree of consensus among the groups. It really was the basis for studying stereotypes. For the most part stereotypes were consistent, but they became less important as time went on. 1933 americans #1 stereotype was that they were indoustrious, but by 1969 that moved down to being less typical. Some things we will keep, some will change depending on current culture and whats going on in the world. They are trait based, or based on context.