Final answer:
The list of criteria and symptoms about the onset, severity, and duration of mental disorders is located in Axis I of the DSM-IV.
Step-by-step explanation:
The list of criteria and symptoms about the onset, severity, and duration of mental disorders is located in Axis I of the DSM-IV.
Axis I includes clinical disorders such as mood disorders, anxiety disorders, and psychotic disorders.
It is used to diagnose specific mental health conditions based on observable symptoms and clinical presentations.