http://goo.gl/afcLRw
"Results from these studies imply that mood-congruent information evokes controlled attention deficits in individuals with depressed mood," the authors conclude. "If mood-congruent information is not able to be efficiently removed from the focus of attention, we would expect this to result in a relative decrease in working-memory capacity for individuals with depressed mood compared to those without depressed mood."
With day-to-day memory and concentration difficulties a defining feature of both clinical depression and dysphoria, understanding the link between the two is of vital importance to improving the wellbeing of those who experience either condition.