I think every person is in a state between depressed and happy. Sometimes due to life experience swinging from one side to another. My question is, does cognitive ability change based on one's psychiatric state?
It is intuitive to think that when one is in a normal rested state that their ability would be better than if they are depressed but what about the changes in the "in between levels". Would a person perform better on cognitive tests when they're more happy or so?