The self-schema refers to a long lasting and stable set of memories that summarize a person's beliefs, experiences and generalizations about the self, in specific behavioral domains. A person may have a self-schema based on any aspect of themselves as a person, including physical characteristics (body image), personality traits and interests, as long as they consider that aspect of their self to be important to their own self-definition. When someone has a schema about themselves they hyper focus on a trait about themselves and believe what they say to themselves about that specific trait. A self schema can be good or bad depending on what that person talks to themselves about and in what kind of tone. For example, someone will have a self-schema of extroversion if they think of themselves as extroverted and also believe that their extroversion is central to who they are. Their self-schema for extroversion may include general self-categorizations ("I am sociable."), beliefs about how they would act in certain situations ("At a party I would talk to lots of people") and also memories of specific past events ("On my first day at university I made lots of new friends"). General The term schematic describes having a particular schema for a particular dimension. For instance, a person in a rock band at night would have a "rocker" schema. However, during the day, if he works as a salesperson, he would have a "salesperson" schema during that period of time. Schemas vary according to cultural background and other environmental factors. Once people have developed a schema about themselves, there is a strong tendency for that schema to be maintained by a bias in what they attend to, in what they remember, and in what they are prepared to accept as true about themselves. In other words, the self-schema becomes self-perpetuating. The self-schema is then stored in long-term memory, which both facilitates and biases the processing of personally relevant information. Individuals who form a self-schema of a person with good exercise habits will then in return exercise more frequently. Self-schemas vary from person to person because each individual has very different social and cultural life experiences. A few examples of self-schemas are: exciting or dull; quiet or loud; healthy or sickly; athletic or nonathletic; lazy or active; and geek or jock. If a person has a schema for "geek or jock," for example, he might think of himself