We encourage all members to take the Standford Depression test here. Its fast and easy and you can compare yourself to 700 other members:
If you get a high score, you can further refine the severity with the QIDS-SR16 test here:
It's a bit more work, but the QIDS-SR16 is most accurate clinical self-test for rating depression - see research findings below.
To score it:______ Enter the highest score on any 1 of the 4 sleep items (1-4)
______ Item 5
______ Enter the highest score on any 1 of the appetite/weight items (6-9)
______ Item 10
______ Item 11
______ Item 12
______ Item 13
______ Item 14
______ Enter the highest score on items (15 and 16)
______ Total Score (Range: 0-27)Severity of Depression. None
Mild
Moderate
Severe
Very Severe... . | 0-5
6-10
11-15
16-20
21-27 |
Screening for Major Depression in Private Practice
Ira H. Bernstein, Ph. D.,Burdette Wendt, Suhayl J. Nasr, MD, and A. John Rush, M.D.
J Psychiatr Pract. 2009 Mar; 15(2): 87–94.
doi: 10.1097/01.pra.0000348361.03925.b3
The 30 item Inventory of Depressive Symptomatology (IDS) (Rush et al. 1986, 1996) and the 16 item Quick Inventory of Depressive Symptomatology (QIDS) (Rush et al. 2003) are designed to assess the severity of depressive symptoms.
The main finding is that although the SCL-D13 was the most reliable in both the CTT and IRT senses, it was the least valid. Conversely, the QIDS-SR16 was the most valid based on four different analyses (effect size/ANOVA, univariate logistic regression/ROC analysis, MANOVA, and multivariate logistic regression) - albeit only slightly more so. The multidimensionality of the CDRS-SR17 might be an advantage as it is potentially sensitive to both the signs and symptoms of depression, thus affording it two opportunities to detect depression. In contrast, the unidimensionality of the QIDS-SR16 suggests that it is limited to the symptoms of depression. It is not surprising that the CDRS-SR17 was multidimensional, as we have previously observed that the Hamilton Rating Scale for Depression upon which it is based, is also multidimensional.4,19 However, the two scales basically correlate perfectly within the limits imposed by their unreliability. In contrast, both are somewhat different from the SCL-D13. As one would expect from the fact that there is substantial similarity among the three sets of items, these differences tend to be small.Quick Inventory of Depressive Symptomatology (Self-Report) (QIDS-SR-16) has proven useful for many years as a way of determining a patient’s level of depression before, during, and after treatment. 
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