This image was taken a few months ago when I participated in research on how stress affects cognitive function.
I completed several tests, like subtracting from 1,000 nine until I got to 0, and this one that I'm doing at the computer.
In the tests where I was "unplugged", I was having my blood pressure taken at the same time.
The electrical cap I'm wearing covers a layer of green goop on my head which conducts the impulses that tell whether I'm stressed or not. Despite the weirdness of the paraphernalia and being in a test situation, I was pretty stress-free.