Your Feelings Aren't Reactions. They're Predictions.
In this Hidden Brain episode, Shankar Vedantam introduces the predictive‑processing view of the brain through a series of vivid demonstrations and stories featuring psychologist‑neuroscientist Lisa Feldman Barrett. The episode begins with an audio‑distortion experiment that shows how the brain fills in missing information based on prior expectations. It then follows Barrett’s early research on self‑discrepancy theory, where repeated failed experiments revealed that participants use emotion words as generic descriptors rather than precise signals. A personal anecdote about a flu‑induced misinterpretation of attraction illustrates how the brain constructs meaning from bodily signals using context. Barrett’s later work on facial‑expression perception shows that context, not facial muscles, drives emotion judgments, leading to the conclusion that emotions are not fixed reactions but predictions the brain generates to guide action. The episode expands this idea to everyday life: using a “cranky fairy” to help a child manage tantrums, reframing nervous energy in karate, and applying Buddhist insights to temper anger. Throughout, the narrative emphasizes that prediction is metabolically efficient, that emotions can be reshaped by altering context, and that recognizing emotions as predictions gives us agency over them. The episode ends with a call to explore more science‑based ideas on the Hidden Brain podcast.
Chapters
Let's try an experiment. I'm going to say something, but garble what I say with static and other distortion. Your job? Try to figure out what I say. The novel All the Light We Cannot See won the Pulitzer Prize in 2015. Did you catch that? Too difficult, right? Now let me play you the non-distorted version. The novel All the Light We Cannot See won the Pulitzer Prize in 2015. Here's the fun part. I'm going to play you the first distorted clip again. See if it makes sense this time. If you could make out the words, that wasn't because your ears got sharper. The audio was exactly the same. What changed was your brain. It heard the clear version, so now it knew what to expect. When the distorted clip played again, your brain filled in the gaps. In fact, your brain predicted what it would hear before it even heard it. What makes this idea freaky, and what I want to talk with you about today, is that this sort of thing doesn't just happen when you hear a familiar sentence that has been distorted. It happens all the time. Most of us think that our brain works like a camera or a recording machine. Signals come in from our eyes and our ears, and our brain makes sense of it. But in recent years, a different picture has emerged. This picture is so surprising, so strange, that at first it can be hard to believe. But it's true. Understanding this picture of your brain will help you understand many things about yourself. In particular, it will give you a new way to understand your emotions, like anger, sadness, and fear, and also help you work more effectively with them. Let me explain. I want you to meet a psychologist and neuroscientist. Lisa Feldman Barrett works at Northeastern University. She's discovered lots of cool things, but we're going to start at a moment early in her research career when life handed her a great insight and she completely missed it. Lisa was in a PhD program. She wanted to help people suffering from anxiety and depression. She was planning to become a clinician. But she also enjoyed doing research. She decided to run some experiments on a concept known as self-discrepancy theory. The idea was straightforward. If there's a mismatch between who you wanted to be and who you were in reality, that gap should make you sad. Previous studies had found that when people had such a gap between their actual selves and their ideal selves, they felt disappointed and dissatisfied. She began by asking people to describe themselves.
You know, I'm a nice person, I'm an honest person, I'm a complex person, I'm a whatever. And then the features of who their ideal self. And then you can compute the similarity or dissimilarity, and then you can also ask people how they feel.
The experiment required people to carefully separate different emotions they were experiencing. They needed to identify when they were anxious and when they were sad. They needed to tell apart the feeling of calm from the feeling of happiness.
That's what I did in the first couple of studies where I was asking people in different ways, or I was attempting to measure emotion in different ways. But I never— I was never able to replicate those experiments.
Lisa failed to get the same result that earlier researchers had found. She tried again and again. 8 times her experiment failed. She assumed she must be doing something wrong. She was just a graduate student after all. Maybe she was sampling the wrong people or running the study at the wrong time of the semester. Desperate and stuck, she went back and looked at the data from all 8 failed experiments.
Then I realized, oh, actually the reason why they're failing was that when people are reporting how they feel, how much sadness do you feel? How hopeless do you feel? How depressed do you feel? You're basically giving them a set of words and you're asking them describe their feelings. And you can do the same thing with anxiety. How anxious do you feel? How jittery do you feel? How fearful do you feel? And so on and so forth. And what I noticed was that when people were reporting that they were feeling intense sadness, they were also reporting that they were feeling intense anxiety. When people reported that they were feeling calm, they were also reporting that they were feeling happy. So What was happening here in these 8 studies is that people were using sadness and anxiety as synonyms for, I feel like crap.
This is why the results were muddled. If people reported feeling sad when they were really anxious, how could Lisa find out if mismatches between people's ideal selves and their actual selves made them sad? The problem, she concluded, was that volunteers were not reporting their feelings accurately. So she thought, if I can find a better way to measure how people actually feel, the results will make more sense. Around this time, something happened in Lisa's personal life that offered her an important clue. She didn't know it was an important clue— that would come much later— but the answer to her puzzle was in fact staring her in the face. Here's what happened. A fellow graduate student kept asking Lisa out for coffee. She wasn't interested, but he was persistent, and eventually she agreed to meet him at a restaurant near campus.
And we're sitting there having coffee in this wonderful little Mediterranean restaurant, and I start to notice that my cheeks are flushed. I'm flushing, and I'm a little warm, and my heart was pounding a little harder than usual, and I was having a little trouble concentrating. And I thought, am I attracted to this guy? Have I been wrong all this time? Maybe he is more interesting than I thought. Maybe I'm I guess he's not that bad looking, and I guess he's sort of more interesting than, than I thought before. And gee, maybe I was wrong.
By the end of the conversation, they'd been there for 2 hours. He asked if they could have dinner sometime. She said yes. She walked home asking herself how she could have been so wrong about this guy. How had she not realized earlier that she was attracted to him? She got home, fumbled for her keys, Stepped inside her apartment.
And then a wave of intense nausea just flares up. I drop my stuff on the floor, slam the door, run to the bathroom, and let's just say spend some time, you know, what do they say, praying to the porcelain god, and then was in bed for a week with the flu.
What Lisa interpreted as romantic attraction was not romantic attraction. She had been coming down with the flu. Her flushed cheeks and racing heart were not the result of Cupid's arrow, but a virus. What Lisa did not realize at the time was that what happened to her on the date was a giant clue to her research problem. It was staring her in the face, but she couldn't see it. Now, she was really sick, so there's that. But it's also the case, not just in science, but in life, that the universe regularly sends us signals. Most of the time, we're too busy, too confused to actually notice them. The event passed, and Lisa was no wiser than she was before. But more than a decade later, she was working on another study that allowed her to revisit the gift that the universe had offered her. Lisa was running an experiment in which she used photographs of actors portraying emotions in various scenarios. In one, the actor depicted the facial expression of someone whose coworker had caught him stealing. The man is about to get reported to the boss and may be fired. Lisa showed these photos to 3 groups of volunteers. The first group saw only the actor's face. The second group got only the scenario. The third group got both.
We compare people who rate the face alone to the people who rated the face in the context, right, to people who rate the context alone. So we can ask the question, What is driving people's perceptions? Is it the expression on the face? Is it the context, or is it some combination? And the answer is it's mostly the context. The context always trumps the actual facial movements.
The actors' facial expressions told volunteers almost nothing. A scowl on someone's face might mean anger. It might also mean they were concentrating or heard a bad joke. Lisa found that half the time when people scowled, They weren't angry at all.
It took me probably systematically about 10 years, maybe more, to come to the conclusion that there are no indicators, objective indicators for an emotion. An emotion word like anger isn't a thing. Anger isn't a thing. It's actually a category of highly variable instances. Sometimes when you're angry, you shout. Sometimes when you're angry, you sit silently and plot the demise of your enemy.
It's the context that helps us read the emotions of others. Then came the epiphany. If we need context to read the emotional expressions of others, to deduce the meaning of the signals they give us, is it possible that we also need context to read our own emotions? Lisa thought back to that date she'd had all those years ago, and she finally saw what the universe had been telling her. She remembered how she was not really interested in the guy who had asked her out, but reluctantly agreed to have coffee. At the restaurant, she started to feel flushed. Her heart raced. She asked herself, am I attracted to this guy? And then when she got home, she found herself violently sick with the flu. Let's break down what happened. Imagine for a second that you are Lisa's brain. Remember, you're sitting in a dark box, which is Lisa's skull, and you're taking in all these signals that your body is sending you. Item number 1, flushed cheeks. Item number 2, racing heart. Now, these signals could mean any number of different things. They're consistent with running up a flight of stairs or being under the weather. So what do you, as Lisa's brain, what do you do to create meaning from these signals? You look at the context. Lisa is on a date. What does it mean when you feel flushed, when you have heart palpitations on a date? Lisa's brain was doing exactly what the volunteers were doing when a researcher showed them pictures of an actor with a frightened expression. It was using the context to explain the situation, to conclude that she was attracted to this guy. Lisa's brain was coming up with an account of the situation, not to an experimenter wearing a lab coat, but to itself.
The more accurate way that I would describe what happened is that my brain made sense of those physical signals coming from the body as attraction. You know, your brain is trapped inside a dark, silent box called your skull, and it's receiving signals from your body. You have sensory surfaces all over your body, in your retina, in each eye, the cochlea in each ear, your skin. You have sensory surfaces inside your body for glucose, for temperature. Mm-hmm. Your brain is constantly receiving sensory signals from the sensory surfaces of your body that inform the brain of the changes in the body and in the world, but the brain doesn't know the causes. It only knows the signals themselves, which are the outcomes. And this is what philosophers call an inverse problem. So your brain is constantly having to solve an inverse problem. It has to guess at the meaning of the causes of those signals. And even when your brain guesses wrong, those guesses become your experience, basically.
Your brain right now is sitting in total darkness inside your skull. It receives electrical signals from your eyes, ears, skin, the sensory surfaces inside your body that track glucose, temperature, oxygen. And from these signals, it constructs the world that you experience: the color of the screen, the feeling of the chair below you. Whether you're curious or anxious or calm. The emotion of feeling attracted to her date was not a fully formed conclusion that was presented to Lisa's brain. It was her brain's conclusion from all the signals and all the context. And in turn, this conclusion shaped what Lisa ought to do next. When her date asked to have dinner sometime, she said yes. It was only when Lisa got home and was violently sick that her brain realized, oops, I got it wrong. The flushed cheeks and racing heart were caused by an illness. But up until that point, Lisa's mistaken conclusion about her date became her experience of the date. She genuinely thought that she was attracted to the guy. Lisa argues that our emotions feel like they are reactions to the world around us, but in reality, they are deductions and predictions about the world. When you hear footsteps coming up quickly behind you in a dark alley, your brain predicts that you might need to run away, and you feel fear. When your child cuddles up next to you on the couch, your brain predicts that it will experience warmth and love, and you reach out to give your child a hug. Most of the time, our emotions don't feel like predictions, but there are times when we can actually see the predictive machinery in action. Here's a scenario that might make things clearer. Think about the last time you heard a loud bang. Your brain processes the sound and then immediately looks for the context.
And what do you do when it's a firecracker versus a car backfiring versus a gunshot? You do very different things. So when a brain asks a question, it's a question of, what do I need to do next to keep myself alive? That's the question that the brain is always asking. What do I have to do?
This happened to me once in Orlando, Florida. I was sitting in my hotel room one evening when I heard a series of loud booms. For a moment, my brain didn't know what to make of them. Then I remembered I was giving a talk at a conference being held at Disney World. Every evening, Disney celebrates the end of the day with a fireworks display. So instead of diving under the desk, I rushed to the window. Threw open the blinds. The booms didn't change. My brain's prediction told me to feel excited instead of scared. This is what Lisa's research has revealed. Your brain is constantly coming up with predictions. It doesn't just predict what's out there in the world. It predicts what's happening inside your body, too. Every feeling you have, every emotion, every mood— this is the brain's best guess of what those internal signals mean And what you should do about them. Most of the time, we never notice this machinery. I reach for the mug on my desk, and it simply feels like I'm seeing the mug and directing my fingers to grasp the handle. But my brain has reached for this mug so many hundreds of times that it can predict the size, the weight, the location of the mug before my hand arrives. It predicts how I'll raise it to my lips, what my tea will taste like, if I've forgotten to add sugar, My taste buds will flag the error, and my brain will update. But every step along the way, it predicts what is coming next. Why does the brain work this way? Well, it's because prediction is more efficient than reaction.
The most effective way to run a system is to predict the state of the system and correct when necessary. It's not to wait and react to things. Reaction is more expensive metabolically than prediction.
If you're sitting by the beach looking out at the waves and your brain has to process every single piece of information coming in through your eyes, it would take up enormous amounts of processing power. To save all this energy, the brain comes up with a model of the ocean in front of you. As the waves rise and fall, your eyes tell you that the ocean is changing, and you update your mental model with those changes. But everything else in the model stays the same. The sun, the clouds, the sand under your toes. This way, your brain is using its precious processing power on the most important thing, the stuff that is changing, and not on things that are staying the same. Along the way, the brain uses its constantly updating model of the world to manage your body's energy. If the next wave is nice and gentle, your brain predicts low effort is needed. It keeps your heart rate steady and suggests the calm action of taking a sip from your drink. But if the next wave looks like a giant tsunami, your brain predicts a massive need for movement. It floods your body, gets you running before you're even consciously aware of the danger. Lisa has a powerful and funny story that shows how our emotions are predictions based on context and other cues.
When my daughter was 12, We threw her a disgust party. We had a bunch of activities that would make the children kind of exuberantly and joyfully disgusted. You know, I made pizza and I put green food coloring on the Parmesan cheese and I made it look fuzzy like mold. And I made vomit Jell-O, so I took peach colored Jell-O, and I put little bits of vegetables in it. And I'm actually— my stomach is roiling just even talking about it. And we took white grape juice and we put it in urine cups. And the goal here was to get the kids simulating, predicting, if you will, disgust, things that are very distasteful, but that they would find it really fun to do this. And they did. I mean, they were Shrieking in pleasure. It was a joy to behold. First of all, it demonstrates that prediction signals are not these abstract things. They are the brain changing the firing of its own neurons to begin to construct an experience before all the information is in from the environment. I mean, I have to tell you that I knew what I was doing, and as I was pouring the grape juice into the urine cups, I'm telling you, it smelled like pee. Like, it just— there was a whiff of pee that I could smell. And basically, your brain is predicting, and those predictions are real signals that construct sensory experience.
If emotions are predictions rather than reactions, that raises another question. Does this mean we have more control over our emotional responses? Lisa says, yes, the moment you realize your emotions are not reactions to the world, but predictions about the world, you can start to ask yourself, do I agree with this prediction? Do I wish to go along with what my emotion is telling me? When Lisa's daughter was a toddler, she threw tantrums like all toddlers do. To calm her down, Lisa invented a character called the Cranky Fairy.
When she would start to feel cranky or crabby, it, it meant that the Cranky Fairy was coming to visit. And then whenever she would feel When she would feel the cranky fairy preparing to make a visit, we gave her a special chair, an Elmo chair, a chair that was like the little Elmo character from Sesame Street, and that she could go to and sit in the chair when the cranky fairy was visiting and sort of vanquish the cranky fairy from her life for that day. And over time, what happened was she would actually march herself to the chair when she felt like she was going to Lose control and have a tantrum.
Lisa's daughter was recognizing that her emotions were telling her to lose control and have a tantrum. But instead of simply following this directive, she personified the emotion as an external force, a cranky fairy, and then decided how she was going to act when the cranky fairy came for a visit. Lisa saw another example when her daughter was 12 and testing for her black belt in karate. She was barely 5 feet tall, And would have to spar against much larger opponents. Her sensei walked up to her, crossed his arms, and said, Get your butterflies flying in formation. He didn't tell her to calm down. She needed that energy to perform. He gave her a different interpretation for the sensations that were flooding her brain. Instead of predicting fear and anxiety, he was telling her, get your brain to predict confidence and focus. When you see that your emotions are predictions, it gives you a bit of distance from them. You can listen to what the emotion is telling you without believing that it's correct. Lisa uses these ideas herself every day. She shared 2 insights that she keeps close. The first, other people's opinions of you are nothing more than electrical activity inside their brains.
Yeah, it's really useful in faculty meetings.
The second comes from Buddhist philosophy. Anger is said to be rooted in ignorance, not because anger is wrong, but because it shuts down curiosity. If someone does something to offend you and you immediately get angry, you've made a prediction about their motives. But if you pause and ask why they did it, you might still disagree, you might still dislike what they did, but the intensity of your discomfort comes down.
It prompts you To be curious about why someone is doing something that you might not like and that you might find even offensive, but they have a reason for doing it. And if you try to take their perspective for a minute, you still might not like it, but you won't be angry anymore.
Let me come back to where we started. I played you a garbled sentence. It sounded like noise. Then I played the clear version. And when you heard the garbled clip again, you could make out the words. Your brain was not deciphering the audio. It was predicting what was there, and that prediction became your experience. Lisa Feldman Barrett's research suggests this is how our emotions work too. Your brain sits in darkness, receiving signals it cannot see the causes of, and it builds a model of the world you experience using all the context and all the available cues. In turn, the model generates emotions that help you do whatever you need to do next. Seeing that your emotions are predictions can show you that they are not your destiny. You can make different predictions. You can give your brain new contexts, new stories. You can, like a 3-year-old marching herself to an Elmo chair, teach yourself to feel something different. Another way of putting this: Our emotions belong to us. They are our brain's predictions shaped by our own history and our own context. No one else put them there. And because they are ours, we can change them. Thank you for watching this video. For more ideas on how your brain works, please tune into my weekly Hidden Brain audio podcast. You can find it on Apple, Spotify, or at hiddenbrain.org. The science of relationships, how to find meaning in your work, and why the people around you do what they do. Our ideas come from the world's leading scientists and researchers, and our small but mighty team spends enormous amounts of time finding ways to make their ideas meaningful and relevant to you. Please check us out. I'm Shankar Vedantam. See you soon.
