They studied motivation & effort in rats, essentially asking the question:
"What makes you work hard for a big (but delayed) reward, when you could just take the easy (but smaller) reward?"
I think of my current state as, always seeking the easy reward. I utterly lack the motivation, energy, and focus, to pursue prolonged difficult tasks (like good programming takes).
When you think about it, we (humans) face this question every day. Why do you get up, and work on hard problems, when you could just sit and watch YouTube? There's got to be something motivating you to sit down, and do the work.
What they found in the study is that if they blocked D1 and D2 receptors, the rats stopped working for the big reward. They would just sit there, and take the small reward. Or, they'd do nothing at all. They became lazy, unmotivated, blobs.
If they supplemented with D-Amphetamine they were able to reverse the effect. Thereby demonstrating, that it's actually the failure to activate D1 and D2 receptors that causes rats to give up on hard work. DOPAMINE is responsible for activating these receptors, and it's these receptors that give you the "OOMF" to get up, and get shit done.
Historically dopamine is seen as the "reward" but that's not really the case. Dopamine is the fuel. It's the catalyst. It's the "mental energy" that gets you off your ass.
So my theory is that, in myself, something is either blocking D1 and D2 receptors... or I've "used up" my dopamine reserves in the brain my continually slamming them with YouTube, gaming, and general computer use. My brain now looks for this high everywhere. Reading a book stands no chance, as it doesn't release anywhere near the dopamine of clicking through YouTube or playing video games.
My baseline is fucked, essentially. So, I am going to begin the hard work of reseting this baseline... No YouTube, no Games. Will report back in a few months.