So much advice here, and yet not a mention of psychology! Where are the answers? How can learning behavior be quantified and understood? I want nuts and bolt

So much advice here, and yet not a mention of psychology! Where are the answers? How can learning behavior be quantified and understood? I want nuts and bolts. I want hard answers to the problem of learning. I'm a self-taught professional, I know for a fact different people learn in unique ways. I'm heading back to school to learn the one thing that kept me out of academia, how to learn.