Depressed persons typically stop performing basic tasks such as eating regularly, taking showers, going out and other similar mundane and boring tasks that requires self some discipline.
What I am looking for is documentation or case studies on people that have been diagnosed with depression, yet still manage to perform normal ADL (Activities of daily living) such as grocery shopping, errands, social activities. How prevalent is the stereotypical lay in bed type of depression versus functional depression, and where can I find more resources on this?
There are cases of depression with ADL, and they are at least as common as the major depressive disorder.
Depression is a highly individual disease and comes in many sizes, shapes and forms. A form of depression is dysthymia, or persistent depressive disorder (PDD) a long-lasting (>2 years) depression during which the individual may be functioning, and may also suffer from episodes of major depressive disorders (known as double-depression). This does not mean that PDD is less severe than other types of depression like MDD (major depressive disorder) or post-natal depression.
The major depressive disorder (MDD) as such is defined as a combination of symptoms that interfere with the ability to work, study, sleep, eat, and enjoy once pleasurable activities. Such a disabling episode of depression may occur only once but more commonly occurs several times in a lifetime. This means that there is a form of depression which is defined by being „disabling“ in a way. This does not mean that all types (or even more than one specific type of depression)