Zung Self-Rating Depression Scale Test

The Zung Self-Rating Depression Scale is a 20-item self-report questionnaire that is widely used as a screening tool, covering affective, psychological and somatic symptoms associated with depression.
The questionnaire takes about 10 minutes to complete, and items are framed in terms of positive and negative statements.
The Zung Self-Rating Depression Scale was designed by Duke University psychiatrist William W.K. Zung MD (1929-1992) to assess the level of depression for patients diagnosed with depressive disorder.