A variety of quizzes exist to diagnose depression, according to WebMD, Psychology Today and DepressedTest.com. The quizzes come in a wide range, from informal online self-tests to inventories that psychologists have designed for professional diagnosis.
Organizations such as Psychology Today and DepressedTest.com post online quizzes so that website users have the chance to evaluate whether or not they are likely to suffer from clinical depression. These quizzes are much less elaborate than some of the tests that psychologists administer in a professional setting. Some examples of professionally designed tests include the Patient Health Questionnaire-9, or PHQ-9; the Beck Depression Inventory, or BDI; and the Zung Self-Rating Depression Scale, reports WebMD.