2000 Continuation of the Cognitive Approach People tend to remember extreme and negative behaviors and people best. So the things people remember best are negative things done by minority members. In general, stereotypes you learn from personal experience are more strongly held than stereotypes learned from others.
Stereotypes serve a communicative function.
Knowledge of stereotypes almost automatically causes you to use it. They almost always come to mind. You use it unless you actually take the time and effort to stop yourself. The real issue is whether you have the mental effort to avoid using the Stereotype. These things affect that .