NEGOCOACH
285
Origin : Non-verbal communication

🧍 Non-verbal communication

Kinesics & proxemics

P. Ekman (micro-expressions), A. Mehrabian, E. T. Hall ("The Hidden Dimension", 1966), J. Navarro ("What Every Body Is Saying", 2008).

Full detail in the “Origin & history” section below.

285

Micro-Expressions

Non-verbal communication Technique 285 / 360
Alexandre Baumberger

Author of the library

Alexandre Baumberger

Negotiation lecturer at KEDGE Business School

A rare threefold background serving negotiation: teaching, commercial justice and audit, backed by experience as a company director in Bordeaux.

  • Teaching, KEDGE Business School Negotiation lecturer since 2014 (12 years).
  • Commercial justice, Commercial Court Judge from 2018 to 2026: litigation, then insolvency proceedings.
  • Audit & advisory, over 20 years Tax, employment and financial audit in major firms, for large groups.
Full profile Contact him
In brief

Micro-expressions are extremely brief facial expressions (a fraction of a second) said to escape voluntary control and to betray an emotion that is felt but suppressed. Theorised by Paul Ekman, they rest on genuine scientific grounding regarding the universality of certain facial emotions, yet their use as a lie detector is greatly overstated by popular culture. A micro-expression signals an emotion, never an intention or a proof of deception.

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Reading level

At a glance

Its family profile at a glance

Effectiveness Psychologicalimpact Discretion Preparation Relationalrisk Ethics
7.3 / 10 Tactical potential

Vigilance: moderate (4.0/10) · Preparation required: 5/10

Grounding in the source school Documented school

Indicative profile: it situates the “Non-verbal communication” family as the Non-verbal communication school practises it, not this technique taken in isolation. Techniques from the same family and school therefore share the same profile. NEGOCOACH editorial rating out of 10, non-experimental · the higher the “relational risk” value, the more costly the technique is to the relationship.

NEGOCOACH assessment

How to read this rating

Tactical potential 7.3/10 (effectiveness, impact, discretion) and vigilance moderate (relational and ethical risk): two distinct readings, deliberately never merged into a single score that would reward risk. NEGOCOACH editorial rating calibrated from the “Non-verbal communication” family and the “Non-verbal communication” school. Each criterion is rated out of 10; click to understand what it measures.

  • Effectiveness 7/10 · High

    How far the technique can carry the negotiation in the intended direction when it is well executed.

  • Psychological impact 7/10 · High

    Strength of the effect produced on the counterpart's perceptions, emotions and decisions.

  • Discretion 8/10 · Very high

    How hard it is for the other party to notice the technique is being used. A high value = very discreet.

  • Preparation 5/10 · Moderate

    The information, analysis and rehearsal required upfront to use it effectively.

  • Relational risk 3/10 · Low

    Potential cost to the relationship and to trust if the technique is spotted, refused or fails. A high value = riskier.

  • Ethics 6/10 · High

    Moral acceptability: fairness, transparency and respect for the counterpart's autonomy. A high value = more defensible.

Level of evidence

Documented school

The school this technique stems from is documented by recognised work and established practice, without experimental consensus. This indicator qualifies the school, not this technique taken in isolation.

Indicative NEGOCOACH editorial rating, for teaching purposes. For “Relational risk”, a high value signals a cost to the relationship, not a quality.

Micro-expressions in brief

Origin & history

The concept stems from the work of Paul Ekman and Wallace Friesen on the universality of six to seven basic facial emotionsi, formalised in the FACS coding system. The series Lie to Me popularised, and exaggerated, the idea that one could “read liars”i. In practice, even when trained, humans detect deception poorly.

Definition and principle

A micro-expression is a fleeting emotional leak: the felt emotion appears briefly on the face before being masked. What it indicates fairly reliably: the presence of an emotion (surprise, anger, fear…) at that instant, sometimes at odds with the spoken words. What it does not indicate: the cause of the emotion, nor deception. Detecting it with the naked eye in real time is difficult and fallible; turning it into a human polygraph is an illusion popularised by fiction.

Concrete examples of application

Application by context

The same technique, across every negotiation settings

Context 1 / 8

Sales negotiation

While announcing a delivery constraint, a seller catches a fleeting expression of displeasure on the client's face, quickly masked. Without concluding rejection, he infers that the lead time is a genuine concern and follows up: “The deadline matters to you, am I wrong?”

How to apply it

Treat a micro-expression as a signal to be verified through a question, never as a conclusion; name the perceived emotion in order to confirm it.

Strengths

Spots an unspoken emotional stake; allows it to be addressed early.

Weaknesses

Easy to over-interpret; a fleeting grimace may have nothing to do with the topic at hand.

Context 2 / 8

Procurement negotiation

On the buyer's side, while pushing for a discount, the negotiator believes he perceives a flash of tension in the seller at the moment he mentions his floor price. He does not treat it as proof of a bluff, but as a point to probe by cautiously pressing on that threshold.

How to apply it

Use a micro-expression as an indication of a sensitive point to explore, not as a revealer of a bluff; always cross-check.

Strengths

Directs pressure towards the seller's real zones of discomfort; sharpens the reading.

Weaknesses

The risk of “seeing” what one wants to see is considerable; making it a lie detector leads to costly mistakes.

Context 3 / 8

Labour negotiation

During a one-to-one, a manager perceives a brief expression of fear in an employee at the mention of a deadline. Rather than pressing, he opens up: “Is this deadline worrying you?” The employee reveals a real difficulty he had been keeping to himself.

How to apply it

Turn the micro-expression into an invitation to speak (“You seem concerned about…”); it guides you towards the subject, it does not settle it.

Strengths

Brings unspoken emotions to the surface; opens dialogue in the right place.

Weaknesses

A mistaken reading followed by an assertion (“I can see this frightens you”) may put the other person on the defensive if it is wrong.

Context 4 / 8

Crisis management

A crisis negotiator follows the emotional leaks on the person's face (fear, anger, relief) to adjust his approach live, identifying what soothes and what reignites tension.

How to apply it

Use micro-expressions as real-time emotional feedback to steer de-escalation, cross-checking them with voice and posture.

Strengths

Provides fine-grained feedback on emotional state; helps navigate an unstable situation.

Weaknesses

Under stress, the reading is difficult and a misinterpretation may worsen the crisis.

Context 5 / 8

Political negotiation

During a debate, an adviser later analyses the recordings in slow motion to spot the opponent's emotional leaks on certain topics, identifying their real points of vulnerability.

How to apply it

Reserve fine analysis of micro-expressions for slow-motion recordings; in real time, the human eye misses them by and large.

Strengths

May reveal zones of tension in the opponent; useful for after-the-fact analysis.

Weaknesses

Political actors are trained to control their faces; the media's over-interpretation of these signals is a plague.

Context 6 / 8

Real-estate negotiation

An agent perceives a fleeting micro-expression of disappointment in a buyer facing a room, despite polite words. He draws no definitive conclusion but gently enquires to understand what dampened the enthusiasm.

How to apply it

Set the micro-expression against the words: a gap between face and polite speech signals a reservation to be brought out.

Strengths

Detects reluctance masked by politeness; allows it to be addressed.

Weaknesses

A tired or concentrated face produces misleading expressions; the cue is fragile out of context.

Context 7 / 8

Cross-cultural negotiation

A negotiator knows that while basic emotions have a largely universal facial expression (Ekman's thesis), their display is governed by cultural display rules: some cultures suppress the public expression of emotions more than others. He weights his reading accordingly.

How to apply it

Distinguish the emotion (fairly universal) from its display (governed by cultural rules); expressive restraint is not an absence of emotion.

Strengths

Avoids concluding coldness or indifference when facing cultures that mask more.

Weaknesses

Display rules vary greatly; the universality of basic expressions is itself debated in recent research.

Context 8 / 8

Family negotiation

A parent perceives a brief expression of sadness in their child who insists that “everything is fine”. Rather than pressing head-on, they create a favourable moment and let the words come, having simply noted the gap between face and words.

How to apply it

Spot the face-words gap as a signal of unspoken distress, and gently open the space for conversation without confronting.

Strengths

Detects suffering masked by “I'm fine”; strengthens well-judged attentiveness.

Weaknesses

Parental worry amplifies the reading; a fleeting expression is not proof of distress.

Counter-techniques

Spot and neutralise this technique

Negotiation is also played on defence. Here is how to recognise this technique when it is used against you, and turn it around.

Detect

The signals that give it away

  • A dominance posture
  • Heavy management of gaze and silences
  • Spatial staging (seat, height, distance)

Neutralise

The counters that defuse it

  • Stay in control of your own posture
  • Don't over-read every gesture
  • Bring the exchange back to words and writing

Turn around

Turn it into an advantage

Align your non-verbal with your message to reinforce your credibility.

The trap to avoid

Letting the staging intimidate you.

In brief

  • Difficulty: High
  • Estimated effectiveness: Moderate (as an emotional cue, not as a detector)
  • Time to implement: A fraction of a second, hard to catch live
  • Fields of application: Crisis negotiation, Sales, Management, Intelligence, Mediation
  • Synonyms: Facial micro-expressions, Emotional leaks, FACS
  • Tags: micro-expressions, Ekman, FACS, emotion, deception myth

Strengths and weaknesses

Micro-expressions offer a fleeting cue to the real emotion, sometimes at odds with the spoken words, useful for spotting an unspoken stake and addressing it early. Their scientific grounding (the universality of certain basic emotions) is solid. But their limits are severe: they are hard to catch with the naked eye, they tell only the emotion (not its cause), and they are not a reliable lie detector.

When to use this technique?

Use it as a signal to be verified, spot a possible emotion and then confirm it with a question, above all in emotionally charged situations (crisis, management, sensitive sales). Fine analysis calls rather for a slow-motion recording. Never use it as proof of deception nor as a verdict.

How to recognise and counter this technique

Recognise: the other party scrutinises your face intently, seeking to “read” your reactions at each announcement. Neutralise: keep a calm face and a stable baseline, let a neutral pause for reflection pass before reacting, so as to offer no exploitable leak. Turn it around: do not rely on your reading of their face either; refocus the decision on the facts, where micro-expressions carry no evidential value.

Limits and ethics

Ethically, reading others' emotions in order to dialogue better is legitimate; turning it into a human polygraph to accuse someone of lying is both false and dangerous. Major warning: a micro-expression indicates an emotion, never a lie or an intention; human detection of deception barely exceeds chance. An isolated expression proves nothing, always cross-check.

Variants and related techniques

Relies imperatively on Calibration (reading emotion by deviation from the baseline) and combines with Tactical empathy (naming the perceived emotion) and Gaze management. Complementary to postural reading (Body positioning). Stands radically opposed to fiction-style claims of lie detection.

Going further

  • Paul Ekman, Emotions Revealed, 2003, and Telling Lies, revised ed. 2009.
  • Paul Ekman & Wallace Friesen, Facial Action Coding System (FACS), 1978.
  • Aldert Vrij, Detecting Lies and Deceit, 2008 (limits of human lie detection).

Objectives of the technique

  • Detect a gap between the counterpart's displayed discourse and their real emotional state (fear, anger, contempt, concealed satisfaction) at the moment an offer is announced
  • Calibrate a behavioural baseline at the start of the meeting so as to spot significant deviations afterwards rather than interpreting isolated signals
  • Identify the precise moment when a concession, a price or an argument touches a sensitive point, in order to adjust the pace and wording of the proposal
  • Check the congruence between a verbal “yes” and real buy-in, so as to detect a superficial agreement that risks not being carried out
  • Choose the right moment to ask a clarifying question or fall silent, drawing on a fleeting emotional reaction observed

Famous cases

Everyday life · The founding case: Ekman and Friesen's patient “Mary”: The concept of the micro-expression originates in a clinical case documented by Paul Ekman and Wallace Friesen in the 1960s. A patient hospitalised in psychiatry, referred to under the pseudonym “Mary”, had requested leave, assuring her doctor with a serene smile that she was feeling better; she later confessed that she had wanted to use that leave to take her own life. Re-examining the film of the interview frame by frame, Ekman and Friesen discovered, amid the smiles, an expression of intense distress lasting a fraction of a second, immediately covered over. This case, published in their work on “nonverbal leakage” (1969), founded all subsequent research: a concealed emotion may briefly “leak” onto the face despite the will to mask it.

Sales · Representative scenario: the price announcement that betrays room for manoeuvre: Representative scenario (not attributed to real people): during a negotiation to purchase industrial equipment, a buyer announces her ceiling budget while watching the salesperson's face closely at the precise moment the figure is stated. As he replies verbally “that's impossible at that level”, she perceives, in the fraction of a second following the announcement, a very brief relaxation of the features, incongruent with the refusal on display. Rather than concluding hastily, she treats this signal as a mere hypothesis to be tested: she holds her figure, leaves a silence, then asks an open question about the cost structure. The seller ends up offering a gesture close to the announced budget. The technique did not “read minds”: it provided a cue of discrepancy that justified holding the position and digging deeper, rather than yielding to the first objection.

Common mistakes

  • Over-interpreting an isolated signal: a micro-expression indicates that an emotion was felt, never why; treating it as “proof of a lie” is the so-called Othello error (a sincere person may show fear simply because they fear not being believed)
  • Neglecting the baseline: interpreting facial movements without having observed the counterpart's usual behaviour in a neutral situation leads to mistaking tics or personality traits for emotional signals
  • Overselling oneself on the technique's reliability: research (Porter & ten Brinke, 2008) shows that genuine full micro-expressions are rare and that lie-detection rates remain modest, even among trained professionals
  • Staring at the counterpart to the point of losing the substance: overly intense observation degrades the relationship, makes the other person uncomfortable and diverts attention from the substantive elements of the negotiation (figures, interests, options)
  • Ignoring differences of context and culture in display rules: while basic emotions are largely universal, intensity and display norms vary, which skews comparisons between counterparts

Scientific foundations

  • Paul Ekman & Wallace V. Friesen (1969) Nonverbal Leakage and Clues to Deception Psychiatry, 32(1), 88-106, DOI: 10.1080/00332747.1969.11023575
  • Stephen Porter & Leanne ten Brinke (2008) Reading Between the Lies: Identifying Concealed and Falsified Emotions in Universal Facial Expressions Psychological Science, 19(5), 508-514, DOI: 10.1111/j.1467-9280.2008.02116.x
  • Paul Ekman (1985) Telling Lies: Clues to Deceit in the Marketplace, Politics, and Marriage W. W. Norton & Company, New York

Quick exercise

Test yourself before answering

Answer in your head, then reveal the solution. Memory is built through active recall.

1 Quels signaux doivent vous alerter ?
  • A dominance posture
  • Heavy management of gaze and silences
  • Spatial staging (seat, height, distance)
2 Quelles parades appliquer ?
  • Stay in control of your own posture
  • Don't over-read every gesture
  • Bring the exchange back to words and writing

Frequently asked questions

The questions we get most

What is the "Micro-Expressions" technique?

Micro-expressions are extremely brief facial expressions (a fraction of a second) said to escape voluntary control and to betray an emotion that is felt but suppressed. Theorised by Paul Ekman, they rest on genuine scientific grounding regarding the universality of certain facial emotions, yet their use as a lie detector is greatly overstated by popular culture. A micro-expression signals an emotion, never an intention or a proof of deception.

Is the "Micro-Expressions" technique ethical?

It sits on the line: effective, but it can tip into manipulation if it exploits an information asymmetry. Use it with measure and without deliberate deceit.

How do you defend against "Micro-Expressions"?

Letting the staging intimidate you. The right reflex: stay in control of your own posture.

What is the "Micro-Expressions" technique based on?

NEGOCOACH does not assess the experimental validation of this technique in isolation. What we document is the grounding of its source school (Non-verbal communication): documented school. Full detail is in the "At a glance" section of this page.

Practise with AI

Three ready-to-use prompts

Copy, paste into your assistant, replace the [brackets]. Works with ChatGPT, Claude, Gemini, Mistral, Perplexity.

Prepare

Build your plan before the meeting

You are an expert negotiation coach. Help me prepare to use the "Micro-Expressions" technique in the following situation: [describe your situation]. Give me: the conditions for success, a 3-step script, my counterpart's likely objections and how to answer them.

ChatGPT Claude Perplexity

Simulate

Rehearse against an AI counterpart

Play the role of my counterpart in a negotiation. I am going to test the "Micro-Expressions" technique. React realistically and with resistance, do not give in too quickly, then at the end analyse my performance and suggest 3 concrete improvements.

ChatGPT Claude Perplexity

Debrief

Analyse a past negotiation

Here is how my negotiation went: [paste the exchanges]. Analyse whether the "Micro-Expressions" technique was used well, what worked, the mistakes made, and spell out precisely what I could have done better.

ChatGPT Claude Perplexity

References

Bibliography & credible sources

Founding works of the 🧍 Non-verbal communication school this technique belongs to.

  • Cover: You Can Negotiate Anything

    You Can Negotiate Anything

    Book

    H. Cohen · 1980

    The best-seller that democratised negotiation: everything is negotiable, provided you understand power, time and information. Accessible in tone and full of everyday examples.

  • Cover: Everything is Negotiable

    Everything is Negotiable

    Book

    G. Kennedy · 1982

    A practical guide to negotiating in daily life as in business, centred on conditional exchange and firmness on your interests. Kennedy hunts down the negotiator's "soft" reflexes.

P. Ekman (micro-expressions), A. Mehrabian, E. T. Hall ("The Hidden Dimension", 1966), J. Navarro ("What Every Body Is Saying", 2008).

On video

See the technique in action

Videos to picture Micro-Expressions and anchor it through examples.

Search for videos Examples & demonstrations

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Technique map

Where this technique sits

Every technique sits within a network: what it draws on, what it combines with, where it applies, and how to defend against it.

Combines with

same family
277 Synchronization 278 Body Mirroring 279 Calibration 281 Pace Variation 282 Occupying the Space 283 Eye-Contact Management

Levers engaged

biases & emotions

Fields of application

Sales negotiation Procurement negotiation Labour negotiation Crisis management Political negotiation Real-estate negotiation Cross-cultural negotiation Family negotiation

Countered by

Spot its signals, neutralise it and turn it around with the defensive playbook on this page.

See the counter-techniques

Key takeaways

  • En une phrase

    Micro-expressions are extremely brief facial expressions (a fraction of a second) said to escape voluntary control and to betray an emotion that is felt but suppressed. Theorised by Paul Ekman, they rest on genuine scientific grounding regarding the universality of certain facial emotions, yet their use as a lie detector is greatly overstated by popular culture. A micro-expression signals an emotion, never an intention or a proof of deception.

  • The right reflex

    Align your non-verbal with your message to reinforce your credibility.

  • Never do this

    Letting the staging intimidate you.

7.3/10 tactical potential Moderate vigilance Documented school

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