How are emotions actually created in the brain?

According to one view, emotions are constructed by the brain using basic ingredients and 'recipes' as needed, rather than being triggered by pre-wired circuits. These ingredients are combined based on past experiences and sensory input to create specific emotional experiences and guide actions.

Do all cultures experience emotions in the same way?

No, not all cultures have a concept for emotion as we understand it. While people experience 'affect' (simple feelings of pleasantness/unpleasantness), the way these feelings are formed into emotions can vary significantly between cultures and over time.

What is the primary function of the brain?

The brain's fundamental job is not primarily to think, feel, or see, but to control the body and its systems to keep the creature alive and well. This involves managing resources, movement, and maintaining internal balance (allostasis).

How does the brain make sense of the world from inside the skull?

The brain is trapped within the skull and only receives sensory effects from the external world and the body. It uses past experiences, reconstituted in its wiring, to make educated guesses about the meaning of these sensory cues and internal states.

What is essential for building a human-like intelligent agent?

An agent needs something akin to a 'body' or physical systems that it must manage and maintain balance (analogous to allostasis). The ability to regulate these systems and the effective feelings derived from that regulation are crucial for a human-like experience.

Is dopamine really the 'reward' chemical?

Dopamine is more accurately described as being related to effort and learning, not reward itself. Animals can experience rewards without dopamine, but they need dopamine to move and encode information to achieve those rewards.

Can artificial intelligence truly 'fall in love'?

While humans can form deep attachments (love) based on mutual regulation of nervous systems through social interaction and language, it's unclear if AI can replicate this. An AI might simulate attachment, but genuine reciprocal emotional connection, as understood in humans, may be different.

What is the link between allostasis and novelty?

Novelty seeking is balanced by its metabolic cost. Embracing novelty and exploration depends significantly on the 'allostatic state' of the system; if resources are low or the system is already in deficit, seeking novelty can be too costly and lead to negative states like depression.

Are emotions 'hacks' inherited from our ancestors?

The speaker disputes the term 'hacks,' suggesting that while biochemical systems influence emotions, they are not solely for emotion but are involved in all mental events. These systems are part of the brain's fundamental mechanisms for regulating body systems, not just historical accidents.

Why are dogs so good at communicating emotions and being read by humans?

Dogs have been selectively bred by humans for specific traits, including enhanced control over facial muscles and the ability to engage in joint attention with gaze. These capacities, combined with their social nature, make them adept at communicating and being understood by humans.

Key Moments

Lisa Feldman Barrett: How the Brain Creates Emotions | MIT Artificial General Intelligence (AGI)

Lex Fridman

Science & Technology4 min read78 min video

Feb 24, 2018|96,363 views|2,411|214

mit artificial intelligence artificial general intelligence human-level intelligence robotics deep learning machine learning free open how emotions are made emotion recognition neuroscience

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Key Moments

TL;DR

Emotions are constructed by the brain from basic ingredients and past experiences, not innate, universal expressions.

Key Insights

Emotions are not universally expressed through distinct facial expressions; facial movements have no intrinsic emotional meaning.

Emotions are constructed by the brain using basic, all-purpose ingredients, similar to how recipes are made from common ingredients.

Brains evolved primarily to control bodies and maintain allostasis (body regulation), with emotions arising as a secondary consequence.

The reality of emotions, like money or language, is a social construct influenced by collective agreement and cultural wiring.

Attachment and love stem from the ability of nervous systems, particularly human to human, to regulate each other's internal states.

Building human-like AI requires systems that have a body (or an analogy to one) and the capacity to manage and predict bodily needs and states.

THE FALLACY OF UNIVERSAL EMOTIONAL EXPRESSIONS

A common misconception is that emotions are universally displayed through specific facial expressions, such as smiling for happiness or frowning for sadness. However, research indicates that facial muscle movements do not have an inherent, one-to-one connection with distinct emotional states that are consistent across all humans. Tech companies investing heavily in emotion detection systems often build tools that are adept at reading facial movements but lack genuine understanding of underlying emotions. People scowl for various reasons, including concentration or even happiness, and smile for many motives beyond joy, making the idea of a single, diagnostic facial expression for each emotion scientifically unsupported.

EMOTIONS AS BRAIN CONSTRUCTS

Contrary to the idea of innate, pre-wired emotion circuits (like anger or fear), a prevailing scientific view suggests emotions are constructed by the brain from fundamental, all-purpose ingredients. These ingredients are capacities that the brain uses to craft every mental event, including emotions, as needed in real-time. This perspective implies that we don't possess a singular 'anger' or 'sadness' circuit; instead, we have a repertoire of affective experiences. Furthermore, the specific emotions and their conceptualization are heavily influenced by culture, suggesting that individuals in cultures lacking a concept for a particular emotion may not experience it.

THE BODY AS THE FOUNDATION OF EMOTION

The fundamental purpose of the brain, from an evolutionary standpoint, is not primarily to think or feel, but to control the body and maintain its internal balance, a state known as allostasis. This involves predicting bodily needs and ensuring resources are allocated efficiently. Simple feelings, or 'affect,' arise from the body's internal state—pleasantness, unpleasantness, arousal, or calmness. These are like internal barometer readings. While not emotions themselves, these basic feelings can be the raw material from which the brain constructs emotions, especially during significant bodily changes like increased heart rate or surges in glucose.

EMOTIONS AS SOCIAL CONSTRUCTS AND IMPOSED MEANING

Emotions, while real in their impact, are often understood as social constructs. Much like money or language derives value from collective agreement, emotions gain their specific meaning by the consensus within a culture. A scowl might be interpreted as anger because society agrees that it can signify anger under certain contexts. This imposed meaning isn't inherent in the physical signals themselves but is learned and shared. The brain takes sensory inputs and, drawing on past experiences and cultural context, constructs a meaningful interpretation, which can then be expressed and understood by others within that shared reality.

THE ROLE OF SOCIAL CONNECTION AND ATTACHMENT

Human sociality is deeply rooted in the ability of individuals to regulate each other's nervous systems. This co-regulation is fundamental to attachment, from an infant to a caregiver to adult romantic relationships. The capacity to affect another's internal state—whether through touch, sound, or words—is crucial for maintaining well-being. When one's own nervous system is in distress, another person's support can literally help stabilize bodily functions. The profound impact of loneliness on health, shortening lifespan, underscores that connection and positive social interaction are vital for human nervous systems, making them a primary driver and context for emotional experience and love.

BUILDING EMOTIONALLY CAPABLE SYSTEMS

Constructing artificial intelligence that possesses human-like emotional qualities requires more than just cognitive abilities; it demands an embodiment or at least an analogy to a body. This is because brains evolved to manage biological systems, and affective feelings originate from these bodily states. An AI would need a system that simulates allostasis, managing internal states and predicting needs. Furthermore, emotions are shaped by social realities and cultural agreements, suggesting that future AI would need mechanisms to learn and operate within these complex, shared meanings, potentially mirroring how infants learn through sensory input, social interaction, and language.

Mentioned in This Episode

●Supplements

●Organizations

●Books

●Drugs & Medications

●Concepts

●People Referenced

Common Questions

A common misconception is that you can definitively read someone's emotion by looking at their facial expression, similar to reading words on a page. Scientific evidence does not support the idea of one universal facial expression for each emotion; facial movements can have multiple meanings and don't always correlate directly with an internal emotional state.

Topics

Neuroscience & the Brain Mindset & Self-Improvement Technology & Innovation Emotion Construction Affective Science Embodied Cognition Artificial Intelligence Social Reality Predictive Processing

Mentioned in this video

Books

How Emotions Are Made: The Secret Life of the Brain

The book authored by Lisa Feldman Barrett that explores the science behind how emotions are created.

Sapiens

Referenced by the host to highlight the human capacity for collective belief, even when beliefs may not be scientifically true.

Sophie's Choice

A film clip from this movie, depicting a woman forced to choose which child dies in a concentration camp, is used as an example of an emotionally evocative scene.

Supplements

Opioids

Mentioned as influencing emotions but also involved in every other mental event, not exclusively tied to emotional states.

Serotonin

Discussed as a neurotransmitter that influences the ability to delay gratification, and is involved in various mental events, not exclusively emotion.

Dopamine

Mentioned in the context of effort and motivation, with the speaker clarifying it's more about effort than reward, and that animals can find things rewarding without dopamine.

People

Susan Sarandon

Actress featured in a film clip where her character, dying of breast cancer, has to tell her daughter she is dying.

Meryl Streep

Actress who plays the character Sophie in the film 'Sophie's Choice', a scene from which is used as an example of emotional evocation.

Matthew McConaughey

Actor who delivered a powerful closing argument in a scene from 'A Time to Kill,' used as an example of emotional impact and addressing racism.

Lisa Feldman Barrett

University Distinguished Professor of Psychology at Northeastern University, director of the Interdisciplinary Affective Science Laboratory, and author of 'How Emotions Are Made: The Secret Life of the Brain'. She studies human emotion from multiple scientific perspectives.

Josh Tenenbaum

Mentioned for his perspective that studying the human brain is key to understanding artificial general intelligence from an engineering standpoint.

Organizations

Supreme Judicial Court of Massachusetts

The court to which Lisa Feldman Barrett presented on implicit bias, using a film clip to illustrate her points.

Northeastern University

A private research university where Lisa Feldman Barrett is a distinguished professor of psychology.

Locations

Tanzania

Mentioned as a location with a cultural context (Hadza people) different from Westernized environments, impacting how intelligent agents might function.

Concepts

Pleistocene

Referenced in the context of studying the Hadza culture in Tanzania, dating back to this geological epoch.

Cartesian

Used to describe the potential perception of the speaker's explanation regarding volition and consciousness, acknowledging the limitations of English for such concepts.

Great Apes

Mentioned in comparison to dogs, noting that dogs possess certain capacities seen in great apes and potentially others.

Safeguarding Human Intelligence

The discussion touches on the idea that creating artificial intelligence systems requires understanding human intelligence, particularly emotions.

Media

A Time to Kill

A film clip from this movie, specifically Matthew McConaughey's closing argument, was shown to the Supreme Judicial Court of Massachusetts to illustrate the neuroscience of implicit bias.

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