In brief: Human emotions are not an uncontrollable inner chaos. Robert Plutchik (1980) identified 8 primary emotions — joy, trust, fear, surprise, sadness, disgust, anger, and anticipation — which combine to produce complex secondary emotions like love, contempt, optimism, or nostalgia. Each primary emotion has three intensity levels (24 nuances total) and fulfills a precise adaptive function inherited from evolution. This clinical guide details each emotion, its physiological manifestations, its combinations into dyads (primary, secondary, tertiary), and explains how CBT uses this map to improve emotional regulation.

All Human Emotions: Complete Guide to Primary, Secondary Emotions and Their Dyads

How many emotions do you feel in an ordinary day? Most of my patients answer "three or four." When I present them the Plutchik wheel for the first time, they realize they easily traverse twenty — without ever naming them. This inability to identify and differentiate emotions has a clinical name: alexithymia. It affects about 10% of the general population and constitutes a major risk factor for anxiety, depression, and relational disorders.

In my practice, I observe daily that the first step of any effective therapeutic work consists of giving precise emotional vocabulary to my patients. You cannot regulate what you cannot name. This guide aims to provide you with this complete map of human emotions, based on the work of Robert Plutchik, Paul Ekman, and Aaron Beck.

The 8 Primary Emotions According to Plutchik

In 1980, American psychologist Robert Plutchik proposed a psycho-evolutionary model of emotions which remains, forty-five years later, one of the most used frameworks in clinical psychology and CBT. His fundamental postulate: emotions are adaptive responses shaped by evolution, each serving a specific survival function.

1. Joy

Clinical definition. Joy is a positive emotional state characterized by a feeling of well-being, satisfaction, and fulfillment. It signals that our fundamental needs are satisfied or that a significant goal has been achieved. Adaptive function. Joy reinforces behaviors that favor survival and reproduction. It consolidates social bonds, encourages exploration, and increases resilience facing future ordeals. Barbara Fredrickson (broaden-and-build theory) demonstrated that positive emotions broaden our attentional and behavioral repertoire. Physiological manifestations. Release of dopamine and serotonin, decrease of cortisol, slowing of heart rate, muscle relaxation, sensation of chest warmth. Facial expression (Ekman). Contraction of zygomatic major muscle (smile), eye crinkling with orbicular activation (Duchenne smile — the only reliable marker of authentic joy), cheek lifting. Typical duration. Variable — from a few seconds (burst of laughter) to several hours (diffuse feeling of happiness). Joy is the briefest positive emotion on average: the brain quickly habituates to it (hedonic adaptation).

2. Trust

Clinical definition. Trust is a feeling of relational security that allows accepting vulnerability with the other. It rests on the prediction that the other will act benevolently and reliably. Adaptive function. Trust allows social cooperation, indispensable to human species survival. Without trust, no group, no division of labor, no collective protection. Work on oxytocin (Zak, 2012) shows that this hormone facilitates interpersonal trust. Physiological manifestations. Release of oxytocin, decreased amygdala activity, relaxation of abdominal muscle tension, deep and regular breathing. Facial expression. Direct but relaxed gaze, relaxed eyebrows, asymmetric micro-smile, slight head inclination (non-threat signal). Typical duration. Trust is more of a state than a punctual emotion. It builds over weeks or months and can collapse in seconds (betrayal). Rebuilding takes significantly more time than initial building.

3. Fear

Clinical definition. Fear is an emotional response triggered by the perception of imminent danger, real or imagined. It activates the sympathetic nervous system (fight-flight-freeze response) via the cerebral amygdala. Adaptive function. Fear is the survival emotion par excellence. It prepares the body to flee or fight by mobilizing energy resources. Without fear, the human species would not have survived Pleistocene predators. The problem arises when this response is triggered by symbolic threats (social judgment, professional failure) with the same intensity as facing real physical danger. Physiological manifestations. Cardiac acceleration (up to 180 bpm in panic attack), adrenaline and cortisol release, pupillary dilation, sweating, muscle tension, peripheral vasoconstriction (cold hands), digestive slowing. Facial expression (Ekman). Raised and drawn-together eyebrows, raised upper eyelids (widening), horizontally stretched lips, slightly opened mouth. Typical duration. Acute fear lasts 20 to 60 seconds (adrenaline peak). Anxiety (diffuse fear without precise object) can last hours, days, even months.

4. Surprise

Clinical definition. Surprise is the briefest emotional response, triggered by an unexpected event that violates our predictive schemas. It is neutral in valence: neither positive nor negative in itself, it quickly tilts toward another emotion according to cognitive evaluation of the event. Adaptive function. Surprise interrupts ongoing activity and orients all attentional resources toward the new stimulus. This rapid attention reorientation allowed our ancestors to detect a hidden predator or a sudden opportunity. Physiological manifestations. Startle reflex: brief trapezius contraction, blinking, brief apnea followed by deep inhalation, brief cardiac acceleration. Facial expression (Ekman). Arched and raised eyebrows, wide-open eyes, mouth open in "O." It is the most universally recognized facial expression across cultures (recognition rate > 90%). Typical duration. The shortest of all emotions: 0.5 to 4 seconds. Beyond that, it transforms into another emotion (joy, fear, anger depending on context).

5. Sadness

Clinical definition. Sadness is an emotional state characterized by a feeling of loss, lack, or powerlessness. It signals that something precious has been lost or that a fundamental need is not satisfied. Adaptive function. Contrary to popular belief, sadness is not dysfunctional. It fulfills three essential functions: (1) signaling to the entourage a need for support (tears are a call for social help), (2) favoring introspection and reevaluation of priorities, (3) saving energy after a loss to allow psychic reorganization. Sadness is the engine of grief — without it, no elaboration of loss. Physiological manifestations. Decrease in dopamine and norepinephrine, psychomotor slowing, fatigue, chest oppression, tight throat, tears (release of leucine-enkephalin, a natural analgesic). Facial expression (Ekman). Lowering of inner eyebrow corners (corrugator muscle), lowering of lip commissures, lowered gaze, drooping eyelids. Typical duration. Sadness is the longest-lasting emotion — on average 120 hours (5 days) according to Verduyn and Lavrijsen (2015), versus 30 minutes for anger. When it exceeds two consecutive weeks with functional impairment, we speak of a major depressive episode.

6. Disgust

Clinical definition. Disgust is an intense aversive response triggered by a stimulus perceived as contaminating or morally repugnant. There is physical disgust (rotten food, body odors) and moral disgust (injustice, betrayal, behaviors judged immoral). Adaptive function. Physical disgust protects against ingestion of toxic substances and infectious diseases. Moral disgust, more recent on the evolutionary plane, reinforces social norms and taboos that protect group cohesion. Jonathan Haidt's work shows that moral disgust is the foundation of certain ethical judgments. Physiological manifestations. Nausea, stomach contraction, increased salivation (vomiting preparation), cardiac slowing (vagal response), body recoil. Facial expression (Ekman). Nose wrinkling (nasalis muscle), raised upper lip, tongue protrusion in intense forms. This expression is identical in all studied cultures. Typical duration. 30 minutes to 2 hours for physical disgust. Moral disgust can persist for days and fuel contempt or chronic resentment.

7. Anger

Clinical definition. Anger is an emotional response to the perception of injustice, frustration, or a threat to personal integrity. It mobilizes energy to eliminate the obstacle or restore a situation perceived as inequitable. Adaptive function. Anger prepares the body for combat (fight response). It increases physical strength, reduces pain perception, and reinforces determination. On the social plane, it communicates a crossed limit and dissuades future aggression. Healthy anger is brief, proportionate, and oriented toward problem resolution. Dysfunctional anger is disproportionate, persistent, and destructive. Physiological manifestations. Adrenaline surge, increased blood pressure, cardiac acceleration, facial redness (facial vasodilation), tension in jaw and fist muscles, elevation of body temperature. Facial expression (Ekman). Lowered and drawn-together eyebrows, fixed and intense gaze, dilated nostrils, compressed or retracted lips showing teeth (primate threat signal). Typical duration. The physiological peak of anger lasts about 90 seconds (Jill Bolte Taylor). However, cognitive rumination can maintain anger for hours, even days. Grudge is chronic anger that can persist for years.

8. Anticipation

Clinical definition. Anticipation is an emotional state oriented toward the future, characterized by increased vigilance and active preparation for an expected event. It can be positive (excitement, impatience) or negative (apprehension, anticipatory anxiety). Adaptive function. Anticipation allows planning, preparing for dangers, and seizing opportunities. It is the foundation of prospective thinking that distinguishes humans from other species. Without anticipation, no foresight, no strategy, no civilization. Physiological manifestations. Moderate activation of sympathetic nervous system, increased vigilance, moderate dopamine release (anticipated reward circuit), light muscle tension, difficulty staying still. Facial expression. Anticipation is the least "readable" of the eight primary emotions on the face. It manifests through a forward-focused gaze, slight eyebrow frowning (concentration), forward body inclination. Typical duration. Very variable: from a few minutes (awaiting an exam result) to several months (pregnancy, life project). Prolonged anticipation without resolution generates chronic stress.

Secondary Emotions: Plutchik's Dyads

One of Plutchik's major contributions is to have shown that complex emotions are not distinct entities but combinations of two primary emotions — exactly like secondary colors are born from mixing two primary colors. He distinguishes three levels of combination according to the proximity of emotions on his wheel.

Primary Dyads (Adjacent Emotions)

Primary dyads combine two neighboring emotions on Plutchik's wheel. These are the most frequent and easily identifiable secondary emotions.

| Emotion 1 | + Emotion 2 | = Primary Dyad | Clinical description |
|:---:|:---:|:---:|---|
| Joy | Trust | Love | Deep attachment combining well-being and relational security. Love in Plutchik's sense is not romantic passion but the stable bond founded on shared joy and reciprocal trust. |
| Trust | Fear | Submission | Acceptance of another's domination through loyalty or dependence. Found in coercive control relationships: the person trusts (attachment) while being afraid (threat). |
| Fear | Surprise | Awe / Dread | Reaction of stunned shock facing a sudden and unforeseen danger. The nervous system switches to freeze mode — neither flight nor combat, but total immobilization. |
| Surprise | Sadness | Disappointment | Reaction facing an unexpected and disappointing event. "I didn't expect that from you" precisely translates this dyad. |
| Sadness | Disgust | Remorse | Moral pain mixed with self-revulsion after an action judged reprehensible. Remorse is distinguished from guilt by the component of self-disgust. |
| Disgust | Anger | Contempt | Rejection combined with the will to dominate or destroy the other. Contempt is the most toxic emotion in couples — John Gottman identified it as the #1 predictor of divorce, with 93% accuracy. |
| Anger | Anticipation | Aggressiveness | Offensive mobilization oriented toward a goal. Aggressiveness is not always pathological: assertive aggressiveness (asserting oneself, defending one's rights) is an essential social skill. |
| Anticipation | Joy | Optimism | Positive expectation of the future combined with present well-being. Realistic optimism (Seligman) is a protective factor against depression. Unrealistic optimism is a cognitive bias. |

Secondary Dyads (Emotions Separated by One)

Secondary dyads combine two emotions separated by an intermediate emotion on the wheel. They are more complex and more ambivalent than primary dyads.

| Emotion 1 | + Emotion 2 | = Secondary Dyad | Clinical description |
|:---:|:---:|:---:|---|
| Joy | Fear | Guilt | Pleasure experienced in a situation perceived as dangerous or forbidden. Guilt is born from the conflict between desire (joy) and fear of sanction or judgment. |
| Trust | Surprise | Curiosity | Exploratory openness combining inner security and interest in novelty. Curiosity requires a sufficient foundation of trust — an insecure child does not explore. |
| Fear | Sadness | Despair | Feeling of total powerlessness facing a threat perceived as inevitable and an irreparable loss. Despair is a major suicide risk factor in clinical practice. |
| Surprise | Disgust | Disbelief | Cognitive and emotional refusal to accept a shocking event. "It's impossible, he couldn't have done that" translates this dyad. Initial phase of trauma. |
| Sadness | Anger | Envy | Pain of not having what the other possesses, mixed with resentment. Envy is distinguished from jealousy (which involves a relational threat, not a lack). |
| Disgust | Anticipation | Cynicism | Worldview marked by generalized mistrust and systematic expectation of the worst in others. Cynicism is often a defense against repeated disappointment. |
| Anger | Joy | Pride | Intense satisfaction linked to self-affirmation or victory. Healthy pride reinforces self-esteem. Excessive pride (hubris) often precedes the fall. |
| Anticipation | Trust | Fatalism | Resigned acceptance of what will come, founded on the conviction that destiny is inescapable. Fatalism can be adaptive (Stoic acceptance) or pathological (Seligman's learned helplessness). |

Tertiary Dyads (Opposite Emotions)

Tertiary dyads are the rarest and most intense, because they combine emotions diametrically opposed on the wheel. They generate considerable internal tension and are often at the heart of therapeutic work.

| Emotion 1 | + Emotion 2 | = Tertiary Dyad | Clinical description |
|:---:|:---:|:---:|---|
| Joy | Sadness | Nostalgia / Melancholy | Bittersweet pleasure linked to the memory of a bygone happiness. Nostalgia is paradoxical: it hurts and feels good simultaneously. |
| Trust | Disgust | Ambivalence | Coexistence of attachment and rejection toward the same person. Ambivalence is the engine of toxic relationships: "I love him but he destroys me." |
| Fear | Anger | Indignation / Freeze | Oscillation between flight and combat facing a threatening injustice. Healthy indignation motivates social action. Freeze (shock) arises when fear and anger neutralize each other. |
| Surprise | Anticipation | Confusion | Cognitive short-circuit when an unexpected event contradicts our predictions. Confusion signals that our mental schemas need updating — uncomfortable but necessary for learning. |

The Plutchik Wheel: Understanding Intensities

The Plutchik wheel is not flat: it forms a three-dimensional cone where each emotion exists at three intensity levels. The lowest level (center of the wheel) corresponds to the most intense form, the external level to the lightest form. This graduation is clinically essential: the difference between annoyance and rage is not qualitative but quantitative.

Table of 24 Emotional Nuances (8 emotions x 3 intensities)

| Low intensity | Medium intensity (primary emotion) | High intensity |
|:---:|:---:|:---:|
| Serenity | Joy | Ecstasy |
| Acceptance | Trust | Admiration |
| Apprehension | Fear | Terror |
| Distraction | Surprise | Amazement |
| Pensiveness | Sadness | Grief |
| Boredom | Disgust | Loathing |
| Annoyance | Anger | Rage |
| Interest | Anticipation | Vigilance |

Clinical application. In CBT sessions, I systematically ask my patients to situate their emotion on this three-level scale. "You say you're angry. On the annoyance-anger-rage scale, where do you stand?" This simple question allows:

Reducing perceived intensity — precisely naming an emotion decreases amygdala activation (Lieberman et al., 2007 study, "affect labeling")

Distinguishing proportionate from disproportionate responses — annoyance facing a bus delay is adaptive; rage is disproportionate

Following therapeutic evolution — a patient moving from "daily rage" to "occasional annoyance" has made considerable progress

Emotions in CBT: The Cognitive Triangle

Thoughts, Emotions, Behaviors

Aaron Beck's cognitive model (1976) postulates that our emotions are not directly triggered by events but by our interpretation of them. This is the famous cognitive triangle:

• Situation → Automatic thought → Emotion → Behavior

The same event (a friend not answering a message) generates radically different emotions according to the automatic thought:

• "He must be busy" → serenity → we wait patiently
• "He's ignoring me on purpose" → anger → we send a passive-aggressive message
• "He doesn't love me anymore" → sadness → we ruminate for hours
• "Something happened to him" → fear → we call urgently

CBT does not seek to suppress emotions — it seeks to identify and correct cognitive distortions that generate disproportionate emotions. Sadness facing a bereavement is healthy. Sadness facing an unread message after 20 minutes is a distortion (catastrophizing, personalization).

Emotional Regulation in CBT

Emotional regulation is the capacity to modulate intensity, duration, and expression of our emotions adaptively. In CBT, it rests on several complementary strategies:

Cognitive reappraisal (the most effective strategy according to Gross, 2002). Modifying the interpretation of a situation before the emotion reaches its peak. Progressive exposure. Facing fear and disgust emotions, avoidance reinforces the emotion in the long term. Gradual exposure (Wolpe's hierarchy) allows desensitizing the amygdala. Mindfulness. Observing one's emotions without judging them or trying to modify them. The metacognitive position — "I notice I feel anger" rather than "I am angry" — creates a space between stimulus and response. Behavioral activation. Acting against the emotion when it is dysfunctional. Going for a walk when sadness pushes to stay in bed. Speaking calmly when anger pushes to shout.

Alexithymia: When Naming Emotions Becomes Impossible

Alexithymia (from Greek a = without, lexis = word, thymos = emotion) designates the difficulty identifying, differentiating, and verbalizing one's own emotions. It affects about 10% of the general population, with higher prevalence in men, people with autism spectrum disorder, ADHD, or psychosomatic disorder.

Alexithymic people are not without emotions — they feel them, sometimes intensely, but cannot decode them. They describe bodily sensations ("I have a stomach ache," "my chest is tight") without connecting them to an emotional state. In CBT, work on alexithymia precisely uses Plutchik's wheel as a psychoeducational tool.

FAQ

How many human emotions exist in total?

The number depends on the theoretical model used. Plutchik identified 8 primary emotions, 24 nuances (3 intensities each), and 24 dyads. Paul Ekman first proposed 6 universal emotions (1971), then expanded to 15-21 according to studies. The most recent research (Cowen and Keltner, 2017) distinguishes 27 discrete emotional categories. There is no universal consensus, but Plutchik's model remains the most used in clinical practice for its clarity and applicability.

Are emotions universal or cultural?

Both. Paul Ekman demonstrated in the 1970s that facial expressions of basic emotions (joy, sadness, anger, fear, disgust, surprise) are identical in all cultures, including isolated peoples (Fore tribe of Papua New Guinea). However, emotional display rules (when and how to express an emotion) are culturally determined.

How to know if an emotion is "normal" or pathological?

An emotion becomes problematic when it meets at least one of these four criteria: (1) it is disproportionate to the triggering situation, (2) it lasts significantly longer than the norm (sadness > 2 weeks, anger > several hours), (3) it impairs social, professional, or personal functioning, (4) it leads to self-destructive or aggressive behaviors.

Can emotions make you physically ill?

Yes. The link between chronic emotions and somatic pathologies is solidly documented. Chronic stress increases cardiovascular risk, weakens the immune system, and favors digestive disorders. Repressed anger is associated with hypertension. Prolonged sadness (depression) modifies brain neuroplasticity.

How to improve emotional regulation daily?

Three practices validated by research: (1) keeping an emotional journal, (2) heart coherence (5 minutes, 3 times per day), (3) systematic cognitive reappraisal. For structured accompaniment, CBT offers a proven framework in 8 to 16 sessions.