Zung Self-Rating Depression Scale (SDS) Test
Understand risk for depressive symptoms in about 3 minutes. This 20 item screen spots mild to severe concerns fast and supports clearer follow up.
08:30
Scale Explorer
How the Scales are Structured
DATA-BASED USER COHORTS
Who Usually Takes This Test?
BASED ON AGGREGATED, ANONYMIZED DATA FROM TENS OF THOUSANDS OF FREUDLY USERS.
Benchmarking
See How You Compare
Once you complete the test, your results are compared with real-world data from people in your country.
Below is a preview of how scores are typically distributed across each scale.
Below is a preview of how scores are typically distributed across each scale.
Depression Index (DI)
Depression Index (DI)
Average
80
Normal range
68.7 — 91.4
min.
25
max.
100
This curve shows how scores are typically distributed.
Once you complete the test, your result will appear on the scale so you can see how you compare.
Once you complete the test, your result will appear on the scale so you can see how you compare.
Raw score (Rs)
Raw score (Rs)
Average
43.4
Normal range
32.7 — 54.1
min.
20
max.
80
This curve shows how scores are typically distributed.
Once you complete the test, your result will appear on the scale so you can see how you compare.
Once you complete the test, your result will appear on the scale so you can see how you compare.
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SAMPLE QUESTIONS
Example Questions From the Test
Please read each statement carefully and select the response that best reflects how you have been feeling recently. Do not spend too much time on any one item, as there are no right or wrong answers.
- Never or rarely
- Sometimes
- Often
- Most of the time or all of the time
- Rarely or none of the time
- Some of the time
- Often
- Most of the time or always
- Never or rarely
- Sometimes
- Often
- Almost always or always
WHAT THE TEST MEASURES
About This Assessment
Zung Self-Rating Depression Scale (SDS) Test - Symptoms and Signs
This self-report measure is designed to screen for current depressive symptom burden using brief, structured ratings. The Zung Self-Rating Depression Scale (SDS) asks respondents to rate the frequency of common affective, cognitive, and somatic symptoms.
It includes 20 items and typically takes about 3 minutes to complete. Results are generally interpreted as an index of symptom severity and are commonly used for initial screening and to support clinical follow-up rather than as a stand-alone diagnosis.
The Zung Self-Rating Depression Scale (SDS) may be useful in clinical and research contexts for monitoring symptom change over time and identifying individuals who may benefit from more comprehensive assessment.
Author: William W. K. Zung
Literature: Beck, A. T., Rush, A. J., Shaw, B. F., & Emery, G. Cognitive therapy of depression. Guilford Press. 1979.; American Psychiatric Association. Diagnostic and statistical manual of mental disorders (4th ed.). American Psychiatric Association. 1994.; Zung, W. W. K. A self-rating depression scale. Archives of General Psychiatry. 1965.; Dunstan, D. A., & Scott, N. Clarification of the cut-off score for Zung’s self-rating depression scale. BMC Psychiatry. 2019.
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