Zung Depression Scale
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About Zung Depression Scale
The Zung Depression Scale is a 20-item 4-point measure of self-reported depression “during the past week” (Zung, 1965). Response options range from “a little of the time” to “most of the time”. The scale measures the presence of pathological disturbances or changes in four areas: somatic, psychological, psychomotor, and mood. Knight, Waal-Manning, & Spears (1983) report an alpha coefficient of .79. The scale has been shown to discriminate depressed from non-depressed psychiatric patients and normal subjects (Zung & Wonnacott, 1970) unaffected by a variety of demographic factors including age, sex, marital status, financial status, and educational level (Zung, 1967).