| Term | Definition |
| Prejudice | an unjustifyable attitude toward a group and it's members |
| Stereotype | a generalized beleif about a group people |
| discrimination | unfair treatment of a person or group |
| ingroup | an exclusive circle of people with a common purpose |
| outgroup | those perceived as different |
| ingroup bias | members selectively process their own group's actions in order to maintain a positive view of the group |
| scapegoat theory | theory that prejudice provides an outlet for anger by providing someone to blame |
| aggression | violent action that is hostile and usually unprovoked |
| Just- world Phenomenon | beleif that people get what they deserve and deserve what they get |
| Frustration- Aggression Principle | fustration creates anger, which can generate aggression |
| Conflict | a perceived incompatibility of actions, goals, or ideas |
| Social Trap | conflicting parties become caught in the mutually destructive behavior |