Depression is a mood disorder in which feelings of sadness, loneliness, and despair take over your life. In this application, you can use the PHQ-9 self-questionnaire to quickly self-test whether you might have major depression. Additionally, it provides you with a severity score of your depressive symptoms. This involves nine easy-to-answer questions.

You can use this application to get insight in your current mood state. You can also use this test to help you make a decision on whether to seek professional help for your depression. The PHQ-9 test consists of the actual nine criteria on which the diagnosis of Dysfunctional Mood Disorder is based.