Discrimination is the unfair or prejudicial treatment of people and groups based on characteristics such as race, gender, age, or sexual orientation. The ability to distinguish between stimuli or objects that differ quantitatively or qualitatively from one another.When someone acts on prejudiced attitudes toward a group of people this is known as discrimination. Prejudice is a common human condition. Prejudice just means prejudgment. Finally, we provide a summary and some conclusions. Defining Discrimination. Finally, we provide a summary and some conclusions. Defining Discrimination. Identify different types of discrimination; View racial tension through a sociological lens.