Answer:
A person who fakes symptoms for a goal is called a malingerer, while a person who fakes a disease for no clear goal has a factitous disorder:
Explanation:
Malingerer is someone who attempts to shirk or escape from duty/ responsibility by feigning. Malingering is the result of a person desire to gain a reward or avoid something and it is not caused by any physical factors. While Factitious disorder entails a person acting as if he or she has a physical or mental illness.
The primary advantage is that it increases survival rates of those who are endangered in any kind.
Answer:
to understand the human and animal behaviour
Explanation:
By looking at the biological bases of human behavior, psychologists are better able to understand how the brain and physiological processes might influence the way people think, act, and feel.