Question

What is the connotation of the words "Normal" and "Abnormal"? What is the intended effect?

Answer 1

In relating to behavior, normal means ordinary. Someone who displays normal (and usually healthy) behavior like the majority of people. Abnormal behavior is just the opposite. 

For example: Person A sees a poisonous snake. They get away from the snake in fear. This person has normal behavior. Person B sees the same snake. They get on the ground and play with the snake. This person has abnormal behavior.