Professor Lisa Feldman Barrett, a psychologist at Northeastern University, contends that the model of the brain as a stimulus-response machine is a myth. Instead, she thinks of the brain as a predictions market, making guesses about everything the body senses.
If you’re walking in the woods and hear rustling in the leaves and don’t know what’s making the noise, your brain supplies possibilities. Is that a rattlesnake? Your brain is giving odds.
The brain self-corrects. If the feared rattler turns out to be a chipmunk, your brain will give you different odds next time.
Barrett says the brain is predicting, rather than reacting, because life comes at us too quickly to make calculations. Something as simple as a game of catch requires predictions. It takes too long to see a ball coming and calculate where it’s going to be when it arrives in front of you. Your brain predicts where the ball will be so you can get the glove up in time. When you’re a kid just learning to play, there are more misses than catches. Gradually, the predictions get better.
The predictions have physical consequences. Before you’re aware of the rattlesnake, your brain has prompted the release of chemicals to give you an extra burst of energy to escape.
Barrett says each of these countless predictions is accompanied by some feeling — fear in the case of a rattlesnake, relief in the case of a chipmunk. From such feelings we build emotions.
I’m still reading, still thinking about this account, which Barrett calls the constructed theory of emotion. But Professor Barrett is a serious thinker. If you are interested in how minds work, you’d probably be interested in her work.
• Lisa Feldman Barrett, How Emotions Are Made; Boston: Houghton Mifflin Harcourt, 2017.