^Goes more in depth here. It's a theory, but could very well be on to something and should be considered. But type 5 resonates well with me, and according to the theory, I have high norepinepherine levels (which equates to, from what I know, focused thinking and comprehension skills/cerebral focused?) yet my concentration/comprehension skills suck unless I'm interested in something. I wonder if depression affects high norepinepherine levels, or high norepinepherine levels increase the chances of depression? I've been depressed lately (mainly due to personal issues) but I've read that there is a link between norepinepherine and depression disorders.
Any other E5s (or E6s and 7s) get depressed, and have trouble with comprehension and concentration when depressed? I would assume one with higher norepinepherine levels would retreat to their comfort zone when sad, which would be some sort of intellectual pursuit? Hmm.