This scale (Zung, 1965) may give an indication of the degree of depression. The list consists of 20 statements that each relate to a specific characteristic of depression. With each statement it must be indicated to what extent the statement applies to the person during the last 2 weeks. Answers are given on a Likert scale with 4 points. The answer alternatives range from “rarely or never” to “almost always or always”. There are norms from 154 healthy adults and from 50 psychiatric patients. These norms are divided into 5 classes, ranging from “HIGH” to “VERY LOW”. The list is also available in English.
Zung, W.W. (1965). A Self-rating Depression Scale. Archives of General Psychiatry, 12, 63-70.