TECHNICAL SUPPLEMENT · CHAPTER 2

The Prediction Error

Name: Your Brain Learns From Surprise, Not Reward | The Dopamine Brain, Chapter 2
Uploaded: 2026-09-18T07:04:05-07:00
Duration: 8 min 35 s
Description: I spent twenty years explaining habits to patients who already understood them perfectly, and I could not work out why nothing changed. The answer is that dopamine does not score what felt good. It scores what your brain did not see coming, and that one correction rewrites what a craving is, what a relapse is, and why a good explanation never fixes either.

I spent twenty years explaining habits to patients who already understood them perfectly, and I could not work out why nothing changed. The answer is that dopamine does not score what felt good. It scores what your brain did not see coming, and that one correction rewrites what a craving is, what a relapse is, and why a good explanation never fixes either.

12 pages · 17 references, every one verified · written by Dr. Gurpreet Singh Padda, MD, MBA, MHP

Watch Chapter 2

The chapter on video — the same argument, with the figures and the studies on screen as they come up.

The receipts behind Chapter 2

The book makes the argument. This supplement shows the evidence, claim by claim: the study, who was in it, the number and where it sits in the paper, what it does not show — and the questions to bring to your own physician. It is written to be shared with your doctor.

Enter your name, email and mobile number. The Chapter 2 PDF arrives by email within a few minutes, and the other thirty supplements arrive one a week, in order. We do not send marketing texts; your number is there so we can reply if you ask us something.

Educational material, not medical advice. If you are in the St. Louis area and want this looked at properly, that is what the Addictionology Center is for.