Don't expect to derive a diagnosis from this test. The author is not a psychiatrist or a psychologist. If you feel that you might suffer from a brain or mental disorder, please seek professional help. Your life is worth conserving.
NOTE: Diagnostic criteria used in this test are based on U.S. psychiatric standards, especially the DSM-IV. European/WHO standards may vary slightly.
The author of this quiz suffers from bipolar disorder. One in every fifty Americans suffers from this same disease. Maybe you or someone you care about is one of them.