How does the knowledge of psychology help heath care workers to deal with aggressive patients?
By understanding behaviorist perspectives of psychology, health care workers can better understand how to refrain from reinforcing aggressive behavior. It is important to understand, for example, that negative attention can be reinforcing in a state of deprivation. It can also help health care workers to come up with a treatment plan for aggressive patients in a mental health facility. I’m not sure you can define aggression, because it takes a lot of different forms in different people, and can be triggered by many different things. If this is a text book question, you might try looking for the definition that your text book gives.