Diagnostic criteria for 300.6 Depersonalization Disorder
A. Persistent or recurrent experiences of feeling detached from, and as if one is an outside observer of, one's mental processes or body (e.g., feeling like one is in a dream).
B. During the depersonalization experience, reality testing remains intact.
C. The depersonalization causes clinically significant distress or impairment in social, occupational, or other important areas of functioning.
D. The depersonalization experience does not occur exclusively during the course of
another mental disorder, such as Schizophrenia, Panic Disorder, Acute Stress
Disorder, or another Dissociative Disorder, and is not due to the direct
physiological effects of a substance (e.g., a drug of abuse, a medication) or a
general medical condition (e.g., temporal lobe epilepsy). (p. 490)