Basically, I think that we can say that Bubbles is somewhat neurotic.
More Positronic to me. #3Laws.
You know, once I found out that a positron is just an anti-matter electron, I realized that Asimov's positronic brains didn't make any sense. Anything you can do with positrons, you can do with electrons much more easily since you don't have to worry about building your computer out of antimatter...
I am not so sure of the correlation of the nomenclature.
It really was handwaving by a really good writer though.
In semiconductor theory, a conductor can be saturated with electrons, and the repulsion causes them to maintain a specific pattern.
A space can exist that has no electron, and it acts as if it is something real with a positive charge. It's called a hole.
There's a whole way of looking at semiconductors where the holes are considered to explain the action of the semiconductor and it refers to "hole current".
This is the 'positronic' system that Asimov was using and a lot of authors and researchers latter on ran with the idea.
Nothing to do with particle physics though the physicists may have absconded with the term for their own use, just like spin, flavor and orientation.