Question
•Why is determining abnormal behavior or a mental disorder so difficult
Answers
Ms. Sue
You'll find your answer if you can determine what is "normal" behavior.
PsyDAG
One aspect is that the definitions of normal and abnormal are culturally influenced, so they may vary from one culture to another.
https://www.google.com/search?client=safari&rls=en&q=normal+abnormal+behavior&ie=UTF-8&oe=UTF-8
https://www.google.com/search?client=safari&rls=en&q=normal+abnormal+behavior&ie=UTF-8&oe=UTF-8