Final answer:
The line between normal behavior and psychological disorder is complex and subjective, depending on factors such as symptom severity, impact on functioning, and cultural norms. The DSM is a resource used for diagnosing and classifying psychological disorders, but there may still be debates and controversies.
Step-by-step explanation:
The line between normal behavior and psychological disorder is a complex and evolving concept in the field of psychology. There isn't a definitive rule or formula for drawing this line, but it usually depends on factors such as the severity of symptoms, the impact on daily functioning, and cultural norms. It's important to note that what may be considered normal behavior in one culture or society may be perceived as a psychological disorder in another. The Diagnostic and Statistical Manual of Mental Disorders (DSM) is an important resource used by mental health professionals to provide guidance in diagnosing and classifying psychological disorders. However, even within the field of psychology, there may be debates and controversies surrounding specific diagnoses and criteria.