One of the most common screening tests for helping an individual to determine his or her depression quotient, the Center for Epidemiologic Studies Depression Scale (CES-D) was originally developed by Lenore Radloff of Utah State University. The quick self-test measures depressive feelings and behaviours during the past week.

This 18-question self-test by pioneering researcher Dr Ivan K Goldberg highlights signs and symptoms associated with depression.

Emerging from research at the University of Leeds, this 12-question self-test screens for symptoms of major depression. Note that some high scores may be accounted for by emotional problems or physical illnesses.

This 15-question short version of the Geriatric Depression Rating Scale is intended to highlight the presence of depressive symptoms in older people.

Developed by researchers in Australia as a simple test of psychological distress, these 10 questions focus on the signs and symptoms of depression and anxiety.

Measuring 16 factors across 9 different criterion domains for major depression, this screening test for depression was originally developed at the University of Texas Southwestern Medical Center.

While the current version of the Beck Depression Inventory is not available for download due to limitations imposed by the copyright holder, availability of the original version from 1961 is less restricted.