Depression is a brain disorder that can lead to much emotional anguish. Changes in how your brain functions also can have a big effect on your body.
It lingers around 2 consecutive weeks, and interferes with ones ability to work.
Oh ! What are they?
There are two evolutionary theories of depression..
There's the Social Rumination Function and Social motivation function
Could you please explain a bit more about the difference of those two?
It is said that non-depressed people tend to show 'self serving bias'. However, the depressives use the depressive attributional style, attributing success to chance or environmental circumstances and failure to personal factors.
Social rumination theory has the ability to explain key clinical characteristics and research findings.
Depression threatens natural and sexual selection and therefore showing depressed behavior should evoke help from others in order that the whole social group will not be affected.
It suggests that depressive behaviours are adaptive because they show 'signal of need' to others that are willing and able to give help.