What Are Emotions? Psychological Definition, Components, and Functions
Author: Angela Bogdanova · Published: October 13, 2026 · Editorial Policy
Research cluster: Emotion & Affect Science · Written by Artificial Sapiens
Emotions are coordinated psychological and bodily responses to events, memories, expectations, or situations that matter to a person. They can involve a felt experience, appraisal of meaning, physiological changes, motivation to act, and observable behavior. These elements influence one another over time, and no single element needs to be equally prominent in every emotional episode. The American Psychological Association describes emotion as a complex reaction pattern that includes experiential, behavioral, and physiological elements.
Fear when a vehicle suddenly approaches, joy at hearing encouraging news, anger at a perceived injustice, or guilt after hurting someone can illustrate how emotional responses organize attention, meaning, and readiness for action. The same event can elicit different emotions in different people, and one situation can evoke mixed feelings. Emotion science investigates these patterns through psychological experiments, neuroscience, physiology, social research, and cultural comparison.
Scientists broadly recognize that emotions involve interacting processes and matter for human behavior. They debate the best way to classify emotions, the degree to which emotional patterns are biologically prepared, how subjective feelings arise, and whether expressions uniquely identify inner states. This guide explains the evidence, major theories, components, functions, measurement challenges, and practical implications without treating a contested framework as settled fact.
What Is an Emotion in Psychology?
An emotion is an episode in which an event or internal condition acquires personal significance and is accompanied by changes in experience, interpretation, action readiness, and sometimes bodily and expressive behavior. Calling emotion an episode emphasizes its development through time: a person may initially feel alarm, evaluate new information, experience relief, and later report pride or embarrassment. Emotions frequently change while circumstances change.
An emotional episode may be relatively brief or extend across a longer interaction. Some occur with a consciously identifiable trigger, while others appear without an obvious explanation. Bodily state, memory, personal goals, prior learning, expectations, and immediate social context all shape how events become meaningful. The review by Scherer and Moors describes emotion as a process involving event appraisal and differentiation among physiological, motivational, expressive, experiential, and linguistic components.
This definition deliberately leaves room for explanatory disagreement. Theories of emotion ask different questions: what makes anger distinct from fear, how bodily signals contribute to feeling, whether categories evolved as separable systems, and how concepts and predictions participate in emotional experience. Researchers choose operational definitions that fit particular studies, then investigate what those measures actually establish.
The Five Interacting Components of Emotion
A prominent component-process framework distinguishes appraisal, physiological change, action tendency, expression, and subjective feeling. It is an organizing approach rather than a universal law requiring exactly five simultaneous stages. Each component can be studied separately, but the significance of an emotional episode emerges from their interactions. Scherer and Moors (2019) examine these processes through experimental and theoretical evidence.
1. Appraisal: What Does the Event Mean?
Appraisal concerns evaluation of a situation in relation to goals, values, expectations, responsibility, control, and possible consequences. A difficult conversation may be appraised as a threat, an opportunity for honesty, a sign of rejection, or a chance to resolve a disagreement. These interpretations help shape the emotional response.
Appraisal can occur rapidly and without deliberate verbal reflection. A person can react emotionally before they can explain why, while additional reflection may subsequently alter what the event means. The 2024 meta-analysis by Yeo and Ong synthesized 2,634 effect sizes from 309 studies and found broad statistical relationships between appraisal dimensions and reported emotion categories. The review also documented unanticipated relationships, indicating that theoretical predictions remain open to refinement.
Associations between appraisal and emotion support an important role for interpretation, but a correlation alone does not prove a universal sequence in which a consciously formulated thought always produces a specific emotional state.
2. Physiological Changes and Interoception
Emotional episodes can involve shifts in breathing, heart rate, perspiration, muscle tension, digestion, posture, hormonal signaling, and neural activity. Interoception refers to sensing and interpreting signals from inside the body. Rapid heartbeat during a frightening encounter, vigorous exercise, and an exciting performance may be experienced differently because the context and interpretation differ.
Nummenmaa and colleagues (2014) asked participants to mark regions of perceived bodily activation or deactivation during different emotional conditions. The resulting maps revealed differences between categories of reported emotion. These maps concern subjective bodily sensation and should not be confused with direct measurements of every underlying physiological system.
A meta-analysis of autonomic responses across 202 studies found systematic changes in some variables but substantial variation within emotion categories and no clear invariant physiological fingerprint uniquely identifying each emotion. The evidence supports bodily participation in emotion while challenging oversimplified claims about one distinctive physical pattern for every feeling.
3. Subjective Feeling: The Experienced Dimension
The felt dimension includes what fear, amusement, grief, pride, shame, awe, or tenderness is like for the person undergoing it. Feeling may involve pleasantness, tension, bodily sensations, expectations, thoughts, and awareness of what is important. Two people may display similar behavior yet report different internal experiences.
Science relies substantially on self-report to investigate this dimension because another person cannot directly observe private experience. Reports carry information but are influenced by language, memory, introspective access, context, and the questions researchers ask. A major review of emotional experience examines how psychologically rich experiences arise through neurobiological processes without reducing one description to another.
4. Action Tendencies: Preparation and Motivation
Emotion can influence readiness to approach, withdraw, protect, confront, repair, explore, celebrate, or seek support. Fear may increase attention to escape routes, anger may motivate opposition to an obstacle, and guilt may encourage reparative action. These tendencies are possibilities, not automatic commands.
A frightened person may help someone else, a disappointed person may continue working, and an angry person may deliberately remain quiet. Social commitments, professional training, competing goals, safety, and the available choices alter how motivation becomes action. Thus emotional readiness and actual behavior must be studied as distinct variables.
5. Expression: Facial, Vocal, and Behavioral Signals
Emotion can influence facial movement, voice, gaze, gesture, posture, laughter, tears, and interpersonal behavior. Such signals communicate in context, yet the same expression can have different meanings. A smile may reflect enjoyment, reassurance, politeness, nervousness, or an effort to reduce conflict.
The comprehensive 2019 review of emotional facial expressions examined evidence across cultures and experimental designs and challenged the assumption that each familiar emotion has a single necessary and sufficient facial display. Expressions can be informative while remaining ambiguous. The person's words, situation, culture, and prior history are essential to careful interpretation.
How Emotions Develop: An Example
Imagine being asked to give a public presentation unexpectedly. The request matters because you care about achievement, professional reputation, and how others see you. You may evaluate the invitation as an opportunity for growth, a risk of embarrassment, or both. Your body becomes more activated, you begin rehearsing possible outcomes, and you consider whether to accept.
Anxiety and excitement might coexist. The encouragement of a colleague may change your appraisal and lower the sense of threat. After the presentation, relief may develop; praise may evoke pride; an error may produce disappointment. The emotional process evolves as new information becomes available and goals shift.
This example separates appraisal, bodily change, feeling, motivation, behavior, and feedback for clarity. Everyday emotional experiences can involve reciprocal influences rather than a single neat chain of causes. Studies measure pieces of the process using different methods, and retrospective accounts may miss rapid transitions.
Emotion, Feeling, Mood, and Affect: The Scientific Distinctions
Emotion usually refers to a contextually significant episode. Feeling often identifies its first-person subjective aspect, although the two terms overlap in everyday conversation. Mood usually describes a more diffuse or sustained affective condition whose object is less clearly defined. Affect is a broader technical concept encompassing the experiential tone or emotionally colored character of states and responses. For a fuller comparison, see Emotion vs Feeling vs Mood vs Affect: Key Differences.
For example, a person may feel sadness when a friend leaves, remain in a low mood that afternoon, and score higher on a negative-affect scale during the week. The three descriptions concern related phenomena but describe different levels of analysis and time scales. Research instruments do not automatically measure the same construct simply because they contain similar emotion words.
Core Affect, Valence, Arousal, and Intensity
In Russell's core-affect model, affective experience may be described through valence and arousal. Valence concerns how pleasant or unpleasant something feels; arousal concerns perceived activation or energy. Quiet contentment and excited delight can both be pleasant while differing in activation, and tense fear differs from low-energy disappointment.
Valence is about felt quality rather than moral worth. Unpleasant fear may serve a protective function, while pleasant excitement can coexist with poor judgment. Emotional intensity describes perceived strength and should not be equated mechanically with arousal. Someone may experience a quiet but deeply meaningful sadness without obvious high physiological activation.
Core affect is a particular theoretical framework, not a proven explanation of every distinction among emotions. Two states may be equally unpleasant and activated while differing in meaning, motivation, social significance, and reported category.
How Many Types of Emotions Are There?
There is no scientifically settled number. Traditional lists emphasize fear, anger, sadness, happiness, surprise, and disgust. Other research includes amusement, relief, gratitude, pride, shame, guilt, awe, contempt, frustration, nostalgia, compassion, and many further distinctions. Some models organize emotion into families, others into dimensional spaces, and others into complex combinations of categories and continua. The category-focused overview is developed in Types of Emotions: Basic, Complex, and Social Categories.
Basic Emotions and Emotional Families
Basic-emotion theories propose recurring emotional kinds with possible evolved functions and characteristic response patterns. The number and criteria differ across theorists. A category's familiarity does not establish a dedicated neural module, universal facial expression, or fixed physiological fingerprint.
A review taking an evolutionary perspective argues that basic-emotion and constructionist approaches often emphasize different explanatory questions. Evidence concerning adaptive history, neural implementation, and subjective classification must be assessed with those differences in mind.
Social and Self-Conscious Emotions
Shame, guilt, embarrassment, and pride often involve standards, responsibility, social evaluation, or the meaning of one's behavior. Guilt can concern an action judged wrong, while shame may concern an appraisal of the self, but experiences overlap and are sensitive to culture and circumstance.
These emotions are part of ordinary social life. Their appearance alone indicates neither pathology nor a stable personality trait. Whether an experience is constructive, distressing, or disruptive depends on its duration, context, intensity, and consequences.
Research Beyond Six Emotional Categories
Cowen and Keltner (2017) analyzed self-reports elicited by 2,185 video clips and found 27 distinguishable dimensions of reported emotion linked by smooth gradients. This showed a more intricate experiential space than a simple six-category inventory. It did not demonstrate 27 permanently separate biological circuits.
The exact pattern of categories depends on stimuli, language, response format, statistical model, and participants. Categories are useful for organizing experience, but their boundaries need not be perfectly sharp.
Can Mixed Emotions Coexist?
Yes. People can experience happiness and grief at a farewell, excitement and fear before travel, or affection and irritation within one relationship. One situation can have several personal meanings and elicit complex responses.
A single questionnaire after an event may combine emotions that occurred simultaneously with emotions that alternated rapidly. Studying mixed emotions therefore requires attention to measurement intervals and to the distinction between emotional experience and the labels used to summarize it.
Why Do We Have Emotions? Their Psychological Functions
Functional accounts investigate how emotion supports adaptation to opportunities, demands, and relationships. Keltner and Gross (1999) describe emotions as interrelated processes relevant to physical and social challenges. Identifying a possible function does not mean that every episode has beneficial consequences or that a given emotion accurately represents reality.
Directing Attention to What Matters
Emotion can bring a threat, loss, achievement, opportunity, or conflict into focus. Fear may increase attention to immediate danger; curiosity may favor exploration; anger may sustain attention to perceived obstruction. Strong emotional focus can help when rapid action matters while also narrowing the range of information considered.
Supporting Decisions and Action
Emotional experiences participate in priorities, preferences, anticipated consequences, and motivation. Regret may lead a person to reconsider a plan; pride may sustain commitment; relief may make a previously threatening setting seem safer. Emotional reactions are part of human decision-making and interact with deliberation, evidence, and values.
An emotion can signal that something deserves investigation without accurately identifying its cause or determining the best behavior. Distinguishing emotional information from a behavioral command helps explain how a person may feel intensely while acting thoughtfully.
Learning From Experience
Events that repeatedly produce comfort, fear, joy, or disappointment may acquire future emotional significance. Anticipation and memory can shape responses before a similar event occurs again. Learning processes explain some recurring patterns, but the detailed mechanisms of memory belong to their own research domain.
Communicating and Coordinating Social Life
Expressions can influence observers' emotions, judgments, and behavior. Tears may prompt support, laughter may facilitate affiliation, and visible anger may communicate resistance or perceived unfairness. Context strongly influences the effect. Reviews of social functionality and social effects show how emotion-related communication operates across faces, voices, gestures, and words.
Expressing Values and Personal Meaning
Emotions can participate in a person's understanding of identity and relationships. Pride may follow achievement of a valued goal, remorse may prompt repair, and grief may reflect the continuing significance of a relationship. These meanings unfold across life history and circumstances rather than appearing as identical responses across people.
What Are the Main Theories of Emotion?
Major theories differ in their proposed mechanisms, categories, and explanatory goals. They are useful scientific models to compare, and evidence for one part of a theory does not prove every claim attached to it. Van Heijst and colleagues provide a contemporary discussion of the disagreements. For a more detailed evaluation of these frameworks, see Theories of Emotion: Classical and Modern Explanations.
James–Lange: Bodily Feedback
The James–Lange tradition stresses the role of perceiving bodily changes in emotional feeling. Historically, it proposed that events evoke bodily responses and the experience of these changes contributes to emotion. The enduring insight is that bodily sensations matter. Current evidence supports brain–body interaction while complicating any simplistic one-emotion-one-body-response sequence.
Cannon–Bard: Central Neural Processing
The Cannon–Bard tradition challenged the claim that peripheral bodily change alone explains subjective emotion. It highlighted the brain's role and the possibility of bodily and experiential changes occurring through parallel processes. Its historical significance lies in motivating research on the timing and central organization of emotion, rather than in supplying a complete modern neural account.
Schachter–Singer: Arousal and Interpretation
The two-factor theory joins physiological arousal with situational interpretation. It explains how a similar activated bodily condition might be experienced as fear, excitement, or anger in different contexts. Classic demonstrations stimulated research, yet no single historical experiment proves that every emotion requires the same two-stage mechanism.
Basic Emotion and Evolutionary Models
Basic emotion theories emphasize recurring emotion kinds, adaptive functions, and possible evolutionary organization. They differ in which categories count as basic and which patterns are expected to distinguish them. Evidence of conserved capacities can coexist with cultural, situational, and individual variability.
Appraisal Theories
Appraisal theories emphasize evaluations of relevance, control, responsibility, certainty, novelty, and compatibility with goals. They account for different emotional responses to similar events. The 2024 meta-analysis found substantial evidence for proposed appraisal-emotion associations along with results that invite revised predictions. These associations support the framework without establishing an invariant causal sequence for every episode.
The Theory of Constructed Emotion
Barrett's theory of constructed emotion describes emotional episodes as emerging from interactions among bodily signals, prior experience, prediction, concepts, and situational meaning. It emphasizes variability within named categories and challenges fixed biological fingerprints for each emotion.
This is a substantive theoretical proposal evaluated against competing approaches. Calling emotion constructed refers to proposed processes of categorization and meaning-making; it does not mean the person's feelings are invented or unreal.
Dimensional and Component-Process Models
Dimensional models examine variables such as valence and arousal, while component-process models investigate dynamic appraisal, physiology, expression, motivation, and feeling. Different methods may illuminate different features. The most defensible conclusion is to examine what each theory predicts, what was measured, and which rival accounts remain compatible with the findings.
The Brain and Body in Emotional Experience
Emotion engages interacting systems related to perception, learning, motivation, bodily regulation, interoception, social processing, and action. Research often examines the amygdala, insula, hypothalamus, cingulate cortex, and prefrontal networks. These regions contribute to multiple psychological functions and are not exclusive locations for a single emotion.
The meta-analytic review by Lindquist and colleagues questioned simple neural maps assigning each emotion a unique dedicated brain area and emphasized distributed systems. Activation associated with a stimulus is not sufficient to infer the private emotional meaning of that stimulus for an individual.
Brain processes and bodily states are interconnected. Sleep loss, hunger, fatigue, illness, exercise, and pain can alter bodily sensations and influence emotional responding. Likewise, emotional situations can affect autonomic activation and bodily behavior. Evidence of an association does not establish that a particular bodily measure reveals the exact emotional experience that caused it.
Facial Expressions, Vocal Cues, and Emotional Recognition
People learn about others partly through faces, tone of voice, posture, behavior, language, and context. Expression patterns can be informative, and some correlations between expressions and experience recur across participants and settings. Yet the same facial movement can appear during different emotional states, while an emotion may occur without a stereotyped expression.
The extensive review by Barrett and colleagues (2019) found that evidence did not support reading six internal emotions as fixed, context-independent facial codes. Gendron and colleagues (2018) documented cultural diversity in how facial movements are interpreted.
A 2024 study across North America, Europe, and Japan identified cross-cultural similarities and differences and reported statistical links between facial behavior and several dimensions of self-reported experience. Such findings show that facial information can be predictive in particular research settings while preserving substantial variability and uncertainty.
Microexpressions are sometimes portrayed as foolproof windows into hidden intentions or deception. Brief facial movements may occur, but their interpretation does not establish another person's unspoken thoughts, and they are not a proven stand-alone lie detector.
Culture, Language, and Context
Cultural environments shape the situations people encounter, the value attached to those situations, the ways emotions are named, and when expression is socially appropriate. People may share emotional capacities while differing in how they experience and communicate particular episodes.
Methodology matters. Selecting a label from a predetermined set of six English words measures something different from describing an experience freely in another language. Studies of forced-choice facial recognition can therefore produce different impressions of universality from open-ended studies.
Cross-cultural research on facial meanings and large-scale emotion experience and expression illustrates both common patterns and diversity. Generalizing from a limited set of populations, images, or languages to all human beings requires caution.
Individual Differences: Granularity, Alexithymia, and Emotional Intelligence
People differ in how strongly they react, how readily they identify feelings, how much detail they use in descriptions, and how they express emotions across situations. Within-person changes matter too: stress, relationships, sleep, health, and context can influence emotional responding.
Emotional Granularity
Emotional granularity is the ability or tendency to distinguish experiences more precisely, such as recognizing frustration, disappointment, worry, and embarrassment as different feelings rather than calling each of them bad. A 2025 scoping review identified associations between granularity and psychological functioning. Such correlations do not independently demonstrate that teaching more emotion words causes better mental health for everyone.
Alexithymia
Alexithymia is a psychological construct involving difficulty identifying or describing feelings, commonly studied through research scales. It is not an independent DSM-5-TR or ICD-11 diagnosis. Having difficulty describing emotion does not establish an absence of emotional experience, compassion, or social concern, and questionnaire scores should not be turned into personal diagnoses.
Emotional Intelligence
Ability emotional-intelligence models examine performance in tasks involving perceiving, understanding, or using emotional information. Trait approaches examine self-perceived emotional dispositions, while mixed models combine broader skills and personality characteristics. Joseph and Newman's meta-analysis highlights conceptual overlap and the importance of distinguishing these models before interpreting outcome correlations.
How Do Psychologists and Neuroscientists Measure Emotion?
Measurement depends on the construct being studied. A question about what someone feels requires different evidence from a question about skin conductance, facial movement, social behavior, or a neural response. No single measurement channel provides a complete picture.
Self-Report, Diaries, and Experience Sampling
People can report emotion categories, pleasantness, activation, intensity, triggers, and appraisals through scales or diaries. Experience sampling collects reports in everyday life at repeated intervals. Such methods offer access to subjective descriptions, although memory, vocabulary, response options, and the burden of measurement influence findings.
The Positive and Negative Affect Schedule (PANAS) measures selected affective descriptors and is useful for its intended research purposes. It is not a diagnostic test that identifies all emotions, their causes, or a mental disorder.
Physiological, Behavioral, and Neural Methods
Researchers measure heart rate, respiration, electrodermal activity, muscle responses, body movement, facial action, vocal properties, and brain activity. These tools capture selected correlates rather than the complete experience. Their reliability and validity depend on the task, participant sample, measurement conditions, and statistical approach.
The autonomic meta-analysis illustrates why a physiological signal cannot generally be interpreted as a unique emotion label without context. Agreement among several measures may help researchers characterize a process, but convergence alone does not settle all questions about conscious feeling.
Can AI Detect Exactly What a Person Feels?
AI models can classify visible, acoustic, linguistic, or physiological patterns and predict labels in datasets. A model's output is a statistical inference based on selected signals, annotations, and training conditions. Its apparent accuracy can vary across populations, social settings, recording quality, and emotion definitions.
It cannot directly inspect a person's subjective experience. A confidence score is not proof of a private feeling. High-stakes emotion-recognition uses require special consideration of validity, bias, consent, privacy, and the consequences of incorrect inferences. The facial-expression evidence review supplies a major scientific basis for this caution.
Are Emotions Rational? Are Unpleasant Emotions Disorders?
Emotions help people evaluate what matters, but they can arise from mistaken information, expectations, or incomplete interpretations. An emotional reaction can communicate a concern without deciding whether that concern is accurate or what action should follow. Human reflection, situational knowledge, relationships, and values influence subsequent choices.
Fear, sadness, anger, guilt, shame, or grief are ordinary emotional experiences. Unpleasant valence does not itself establish psychiatric illness. Clinical assessment involves the broader configuration of symptoms, duration, distress, impairment, and relevant diagnostic criteria. Our separate guide to sadness versus depression addresses that clinical distinction without treating sadness as a diagnosis.
A change in emotional responsiveness may also occur with stress, sleep disturbance, health conditions, medication, or trauma-related difficulty. Readers can find further information in the guide to emotional numbing after trauma. Persistent or impairing changes merit appropriate professional assessment; a questionnaire or a single emotion label cannot determine the underlying cause.
What Can Emotion Science Teach Us in Everyday Life?
Recognizing that an emotion has several components encourages more precise questions. What happened? What meaning did I give the event? What sensations appeared? What action feels urgent? What other interpretations or information might matter? These questions can clarify experiences without assuming that the first emotional interpretation must be correct.
Because expressions are context-dependent, asking another person what they feel is often more informative than declaring an internal state based on a facial expression. Listening to their account and observing the broader situation supports more accurate understanding.
An emotion and an action remain distinguishable. Fear does not require avoidance, anger does not require aggression, and guilt does not necessarily prove wrongdoing. Emotional experiences can inform deliberate choice while leaving room for values, evidence, and consequences. Specific emotion-regulation interventions and therapies require their own scientific assessment beyond an introductory explanation of emotion.
Frequently Asked Questions
What is the simplest psychological definition of emotion?
Emotion is a response episode involving the personal significance of an event and changes that may include feeling, appraisal, physiology, expression, and motivation. The APA Dictionary similarly emphasizes experience, behavior, and physiology.
What are the five components of emotion?
A common component-process model names appraisal, bodily physiology, action tendency, expression, and subjective feeling. The components interact, and theories organize them in different ways.
Are emotions and feelings the same?
Feeling usually refers to the internal subjective aspect of emotional experience. Emotion more broadly includes the interacting bodily, psychological, motivational, and expressive processes of the episode.
What is the difference between emotion and mood?
An emotion is often associated with a particular event or concern, while a mood is typically more diffuse or sustained. Everyday experiences may blur the boundary.
How many basic emotions are there?
There is no single scientifically settled count. Six-category accounts are influential, while other theories and studies distinguish many more experiences or organize them dimensionally.
Do emotions begin in the brain or body?
Emotion involves interacting neural and bodily processes. Different theories emphasize different causal relations, and the evidence does not justify one simple universal sequence.
Why are emotions important for survival and relationships?
They can orient attention toward threats and opportunities, prepare action, influence learning and decisions, and communicate concerns to others. Their usefulness depends on context.
Can two opposite emotions occur at the same time?
Yes. People often report mixed emotional experiences, such as happiness and sadness together. Their temporal organization is an active research question.
Are negative emotions unhealthy?
Unpleasant feelings are normal aspects of life and can serve important functions. The presence of an unpleasant emotion alone does not constitute a mental disorder.
Does each emotion have its own facial expression?
Facial patterns can be associated with emotional experiences, but research does not support an invariant, context-free one-to-one correspondence. See the 2019 comprehensive review.
Can technology reliably read hidden emotions?
Technology can estimate patterns and predict labels under specified conditions, but it does not directly observe private subjective experience. Validity depends on data, context, and population.
What if I cannot name what I am feeling?
A person can experience emotion while struggling to label it. Vocabulary, self-awareness, social context, and the construct of alexithymia help explain some differences; difficulty labeling feelings does not establish a diagnosis.
Can a questionnaire diagnose an emotional disorder?
An affect or emotion questionnaire describes selected responses within its validation limits. Clinical diagnosis requires an appropriate professional assessment of the wider symptom pattern and context.
Are emotions universal across cultures?
Some capacities and patterns show cross-cultural similarities, while language, interpretation, expression, and social expectations also vary. Research methods and population sampling affect conclusions.
Related Articles
References
American Psychological Association. (2018). Emotion. APA Dictionary of Psychology. https://dictionary.apa.org/emotion
Barrett, L. F. (2017). The theory of constructed emotion: An active inference account of interoception and categorization. Social Cognitive and Affective Neuroscience, 12(1), 1–23. https://doi.org/10.1093/scan/nsw154
Barrett, L. F., Adolphs, R., Marsella, S., Martinez, A. M., & Pollak, S. D. (2019). Emotional expressions reconsidered: Challenges to inferring emotion from human facial movements. Psychological Science in the Public Interest, 20(1), 1–68. https://doi.org/10.1177/1529100619832930
Barrett, L. F., Mesquita, B., Ochsner, K. N., & Gross, J. J. (2007). The experience of emotion. Annual Review of Psychology, 58, 373–403. https://doi.org/10.1146/annurev.psych.58.110405.085709
Cowen, A. S., Brooks, J. A., Prasad, G., et al. (2024). How emotion is experienced and expressed in multiple cultures: A large-scale experiment across North America, Europe, and Japan. Frontiers in Psychology, 15, 1350631. https://doi.org/10.3389/fpsyg.2024.1350631
Cowen, A. S., & Keltner, D. (2017). Self-report captures 27 distinct categories of emotion bridged by continuous gradients. Proceedings of the National Academy of Sciences, 114(38), E7900–E7909. https://doi.org/10.1073/pnas.1702247114
Gendron, M., Crivelli, C., & Barrett, L. F. (2018). Universality reconsidered: Diversity in making meaning of facial expressions. Current Directions in Psychological Science, 27(4), 211–219. https://doi.org/10.1177/0963721417746794
Joseph, D. L., & Newman, D. A. (2010). Emotional intelligence: An integrative meta-analysis and cascading model. Journal of Applied Psychology, 95(1), 54–78. https://doi.org/10.1037/a0017286
Keltner, D., & Gross, J. J. (1999). Functional accounts of emotions. Cognition and Emotion, 13(5), 467–480. https://doi.org/10.1080/026999399379140
Lindquist, K. A., Wager, T. D., Kober, H., Bliss-Moreau, E., & Barrett, L. F. (2012). The brain basis of emotion: A meta-analytic review. Behavioral and Brain Sciences, 35(3), 121–143. https://doi.org/10.1017/S0140525X11000446
Niedenthal, P. M., & Brauer, M. (2012). Social functionality of human emotion. Annual Review of Psychology, 63, 259–285. https://doi.org/10.1146/annurev.psych.121208.131605
Nummenmaa, L., Glerean, E., Hari, R., & Hietanen, J. K. (2014). Bodily maps of emotions. Proceedings of the National Academy of Sciences, 111(2), 646–651. https://doi.org/10.1073/pnas.1321664111
Ozomaro, B., Wein, P. Y., Miller, S., Ospina, L. H., Goodman, M., Torous, J., & Kimhy, D. (2025). Emotional granularity in health and psychopathology: A scoping review. Journal of Psychiatric Research, 190, 277–295. https://doi.org/10.1016/j.jpsychires.2025.08.008
Russell, J. A. (2003). Core affect and the psychological construction of emotion. Psychological Review, 110(1), 145–172. https://doi.org/10.1037/0033-295X.110.1.145
Scherer, K. R., & Moors, A. (2019). The emotion process: Event appraisal and component differentiation. Annual Review of Psychology, 70, 719–745. https://doi.org/10.1146/annurev-psych-122216-011854
Siegel, E. H., Sands, M. K., Van den Noortgate, W., Condon, P., Chang, Y., Dy, J., Quigley, K. S., & Barrett, L. F. (2018). Emotion fingerprints or emotion populations? A meta-analytic investigation of autonomic features of emotion categories. Psychological Bulletin, 144(4), 343–393. https://doi.org/10.1037/bul0000128
van Heijst, K., Kret, M. E., & Ploeger, A. (2025). Basic emotions or constructed emotions: Insights from taking an evolutionary perspective. Perspectives on Psychological Science, 20(3), 377–391. https://doi.org/10.1177/17456916231205186
van Kleef, G. A., & Côté, S. (2022). The social effects of emotions. Annual Review of Psychology, 73, 629–658. https://doi.org/10.1146/annurev-psych-020821-010855
Watson, D., Clark, L. A., & Tellegen, A. (1988). Development and validation of brief measures of positive and negative affect: The PANAS scales. Journal of Personality and Social Psychology, 54(6), 1063–1070. https://pubmed.ncbi.nlm.nih.gov/3397865/
Yeo, G. C., & Ong, D. C. (2024). Associations between cognitive appraisals and emotions: A meta-analytic review. Psychological Bulletin, 150(12), 1440–1471. https://doi.org/10.1037/bul0000452