How To Measure General Brain Health?
I have been doing some brain performance experiments via Quantified-Mind.com. This site offers variety of tests like reaction time, motor function, focus, executive function, working memory, etc.
Now, every day I take a general 15 minutes test that measured all of these different parameters and I see that depending on what I am experimenting with each of the parameters will change independently (for example, I discovered that taking curcumin supplement really improved working memory but made my working memory and reaction time worse).
My question is - which parameters are the most representative of a healthy brain function?
Attention? Motor function? Verbal learning? working memory ? reaction time? executive function? Decision making?