What happens in your brain when you experience positive reinforcement isn’t magic—it’s neurochemical. Good feelings spur the production of a neurotransmitter (a chemical messenger in the brain) called dopamine that controls the brain’s “reward system” and helps us remember what behavior led to feeling good so we will do it again. With the help of dopamine, the brain encodes the cause-and-effect relationship, and this creates expectations for the future.
