NEGOCOACH
277
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.

277

Synchronization

Non-verbal communication Technique 277 / 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

Synchronisation refers to the mutual, often unconscious adjustment of behaviours between two speakers: speech rhythm, posture, gestures and breathing eventually fall into step with one another when a relationship “clicks”. Far from being a trick to apply mechanically, it is first and foremost a symptom of rapport: people who are in sync are so because they are in accord, not the other way round. In negotiation, the challenge is to sustain this natural convergence without ever slipping into caricatured imitation.

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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.

Synchronisation at a Glance

Origin & History

The phenomenon was described as early as the 1970s under the name interactional synchrony in work on the micro-analysis of interactioni. It was popularised, often in simplified form, by NLP (neuro-linguistic programming) under the term pacing, whose theoretical apparatus nonetheless remains scientifically unvalidatedi. Serious research belongs rather to the psychology of interpersonal coordination.

Definition and Principle

To synchronise is to let the tempo and tone of the exchange converge rather than impose one’s own. It should be clearly distinguished from bodily mirroring (occasional postural imitation): synchronisation is a temporal and holistic phenomenon, a dance of continuous adjustments. The presumed mechanism is twofold: motor coordination fosters a sense of relational fluidity, and that fluidity is read as similarity, which in turn feeds trust. Note, however: the effect is real but modest, and a forced adjustment shows.

Concrete Examples of Application

Application by context

The same technique, across every negotiation settings

Context 1 / 8

Sales negotiation

A salesperson facing a client who speaks slowly and deliberately slows down their own delivery and lowers their tone. The meeting becomes fluid, the client relaxes and sets out their real needs instead of staying on the defensive.

How to apply it

First match your speech tempo to the client’s, before any argument. Vocal synchronisation is more discreet and more effective than postural imitation.

Strengths

Creates a climate of fluidity without the client being able to identify the manoeuvre; puts slow profiles at ease, whom abrupt pressure would drive away.

Weaknesses

An adjustment that is too quick or too marked becomes noticeable and rings false; risk of appearing limp with a client who is themselves looking for energy.

Context 2 / 8

Procurement negotiation

On the buyer’s side, a procurement manager notices that a hurried seller speeds up and pushes them towards a decision. They deliberately maintain a slow pace and silences, forcing the seller to synchronise downwards and ease off the time pressure.

How to apply it

Use your tempo as leverage: by refusing to synchronise with the seller’s eagerness, you impose your own and take back control of the pace.

Strengths

Neutralises time-pressure techniques; calm imposes a posture of command and gives time to analyse the offer.

Weaknesses

Requires genuine discipline: the temptation to follow the seller’s energy is strong; excessive slowness can cost you a genuinely good deadline.

Context 3 / 8

Labour negotiation

In a tense union meeting, a mediator gradually adopts the delivery and register of the staff representatives, without aping their accent. The perceived gulf narrows and listening becomes possible again.

How to apply it

Synchronise the register and the collective rhythm of the room rather than the style of any single individual; it is the mood you attune to.

Strengths

Reduces the sense of class or status distance; makes the mediator audible to a wary group.

Weaknesses

Perceived as pandering if the substance does not follow; an overdone register comes across as condescension.

Context 4 / 8

Crisis management

Faced with a highly agitated person, a negotiator does NOT synchronise with the agitation: they start slightly in phase, then deliberately slow down, drawing the other person downwards. This is pacing then leading, used in de-escalation.

How to apply it

Briefly join the perceived emotional state, then lead towards calm by slowing your own tempo; never raise the stakes on the excitement.

Strengths

A de-escalation tool proven in the field; works when no rational argument gets through.

Weaknesses

Synchronising too faithfully with anger amplifies it; requires composure and training so as not to be swept up in the other person’s emotion.

Context 5 / 8

Political negotiation

In a debate, a leader adapts their pace to that of the moderation and the target audience rather than to the aggressiveness of their opponent, projecting an image of measured serenity that contrasts with the adversary’s nervousness.

How to apply it

Synchronise with the target audience, not with the opponent; the contrast in tempo becomes a signal of composure.

Strengths

The deliberate mismatch in rhythm builds an image of stability; defuses attempts to drag you into a brawl.

Weaknesses

Calm that is too pronounced can look like detachment or contempt; the audience may prefer energy to composure.

Context 6 / 8

Real-estate negotiation

An agent receives a hesitant couple who speak softly and take their time in each room. They drop their brisk, cadenced sales patter, slow down and leave silences by the windows. The couple picture themselves living there and finally voice their real reservations.

How to apply it

Let the rhythm of the viewing fall into step with the buyers’; synchronised silences are worth more than a running commentary.

Strengths

Encourages the emotional projection that is decisive in a residential purchase; brings out unspoken objections.

Weaknesses

Unsuited to a fast, factual investor who expects figures and yield, not an atmosphere.

Context 7 / 8

Cross-cultural negotiation

A French negotiator used to a rapid delivery and overlapping speech works with Japanese partners who allow for long silences. He learns to slow down and to respect the pauses, without which he would seem pushy and disrespectful.

How to apply it

First adjust to the cultural tempo: pace, tolerance for silence and turn-taking vary enormously from one culture to another.

Strengths

Avoids major blunders of rhythm; signals respect for local codes, often more decisive than content.

Weaknesses

Synchronisation norms differ radically across cultures; what builds rapport here may cause discomfort elsewhere. There is no universal setting.

Context 8 / 8

Family negotiation

During a tense family discussion, a parent stops firing back at a teenager who is speaking fast and loud. They slow down and lower their voice; the teenager, deprived of a rhythm to fight against, eventually falls into line and the tone subsides.

How to apply it

Refuse to synchronise with the escalation; impose a calmer tempo and let the other person latch on to it.

Strengths

Defuses rising tension without a word of command; preserves the bond.

Weaknesses

Perceived as coldness or evasion by a loved one who wants their emotion to be heard; can be frustrating.

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: Intermediate
  • Estimated effectiveness: Moderate
  • Time to implement: Gradual, over the whole course of the exchange
  • Fields of application: Sales, Mediation, Crisis negotiation, Management, Diplomacy
  • Synonyms: Interactional synchrony, Pacing, Interpersonal coordination, Attunement
  • Tags: synchronisation, rhythm, rapport, pacing, non-verbal

Strengths and Weaknesses

Synchronisation sustains a sense of relational fluidity that lowers defences and eases the exchange of information. Its main asset is discretion: done well, it is imperceptible. Its limit: the effect is real but modest, often overstated by sales literature, and any forced execution turns it into a signal of manipulation.

When to Use This Technique

To be cultivated at the opening and throughout relational exchanges, particularly with interlocutors who are anxious or slow to open up. To be deliberately suspended in de-escalation (do not follow the agitation) and under pressure, where a deliberate mismatch in rhythm serves your posture. Of little use in a purely factual, quick-fire transaction.

How to Recognise and Counter This Technique

Recognise it: the other party visibly matches their delivery, pauses and register to yours within the first few minutes. Neutralise it: break the rhythm (change tempo, insert a silence, switch to the facts) to check whether they follow you slavishly, a sign of deliberate adjustment. Turn it around: impose your own tempo and observe who synchronises with whom; the one who leads the rhythm often leads the exchange.

Limits and Ethics

Ethically, sincere synchronisation (relational attunement) is healthy; its instrumental version, applied cold to lull vigilance, slides towards manipulation. Warning against over-interpretation: the absence of synchronisation proves neither hostility nor deceit, and its presence does not guarantee agreement; an isolated gesture or rhythm proves nothing. Many people fail to synchronise for reasons of temperament, tiredness or culture.

Variants and Related Techniques

It is distinct from bodily mirroring (occasional postural imitation) and encompasses synchronised breathing as a special case. It combines with calibration (reading the other person’s state in order to adjust better) and rhythm variation (deliberately breaking synchronisation). It stands opposed to the register of the power struggle and temporal domination.

Further Reading

  • Edward T. Hall, The Hidden Dimension, 1966 (rhythms and temporal codes of interaction).
  • Joe Navarro, What Every BODY Is Saying, 2008 (a cautious reading of bodily signals).
  • Tanya Chartrand & John Bargh, “The Chameleon Effect”, Journal of Personality and Social Psychology, 1999.

Aims of the Technique

  • Quickly establish a climate of trust and rapport by discreetly aligning with the interlocutor’s posture, gestures, rhythm and tone.
  • Reduce psychological distance and mistrust at the start of a negotiation, when the parties do not know one another.
  • Encourage the sharing of information about underlying interests, a precondition for value creation (integrative agreements).
  • Detect changes in the other party’s emotional state: a sudden desynchronisation often signals disagreement or unease.
  • Prepare the ground for subsequently guiding the exchange (pacing then leading): once synchronisation is in place, a change of rhythm on your part tends to be followed.

Famous Cases

Business · The “Chameleons bake bigger pies” experiment (Maddux, Mullen & Galinsky, 2008): Documented case. In this study conducted with MBA students, negotiators were instructed to discreetly mimic their counterpart’s gestures and posture during a simulated negotiation (notably the sale of a petrol station where no agreement was possible on price alone). Result: negotiators who synchronised their behaviour reached an agreement about two-thirds of the time, against barely more than one-tenth for the others. Synchronisation increased perceived trust, which prompted the seller to reveal their real interests (staying on as an employee of the station) and made it possible to uncover an integrative solution.

Everyday life · Waiters’ verbal mimicry and tip amounts (van Baaren et al., 2003): Documented case. In the Netherlands, Rick van Baaren’s team asked a waitress to repeat, word for word, the order of half of her customers (verbal synchronisation), and simply to nod for the other half. The “mimicked” customers left significantly larger tips. The study illustrates the central mechanism of synchronisation: behavioural alignment, however minimal, increases the interlocutor’s liking and generosity without their being aware of it.

Sales · Representative scenario: the meeting with a hurried buyer: Representative scenario (not attributed to real people). A saleswoman meets a fast-talking procurement director, leaning forward, using short sentences. Rather than delivering her usual measured pitch, she first adopts his tempo: brief replies, brisk rhythm, engaged posture. After a few minutes, rapport sets in; she then gradually slows her delivery to address the complex points of the contract, and the buyer, now synchronised, slows down with her and agrees to go into the detail of the clauses he had initially wanted to rush through.

Common Mistakes

  • Aping instead of synchronising: imitating immediately and visibly (every gesture copied within the second) is perceived as mocking mimicry and destroys trust; synchronisation must be partial, offset by a few seconds and focused on discreet elements (overall posture, rhythm, tone).
  • Synchronising with negative states: mirroring the other person’s aggressiveness, closedness or nervousness amplifies the escalation instead of defusing it; you synchronise rhythm and energy, not hostility.
  • Neglecting substance in favour of form: synchronisation creates a climate; it replaces neither preparation, nor argument, nor knowledge of your BATNA.
  • Never moving on to “leading”: staying indefinitely in the following phase lets the other party set the tempo of the whole negotiation; the value of the technique lies in being able, once rapport is established, to shift the rhythm and direction of the exchange.
  • Ignoring cultural differences: physical distance, eye contact and gestures do not carry the same meaning everywhere; synchronisation applied mechanically can be counterproductive in a cross-cultural context.

Scientific Foundations

  • Chartrand, T. L., & Bargh, J. A. (1999) The chameleon effect: The perception-behavior link and social interaction Journal of Personality and Social Psychology, 76(6), 893-910, DOI: 10.1037/0022-3514.76.6.893
  • Maddux, W. W., Mullen, E., & Galinsky, A. D. (2008) Chameleons bake bigger pies and take bigger pieces: Strategic behavioral mimicry facilitates negotiation outcomes Journal of Experimental Social Psychology, 44(2), 461-468
  • van Baaren, R. B., Holland, R. W., Steenaert, B., & van Knippenberg, A. (2003) Mimicry for money: Behavioral consequences of imitation Journal of Experimental Social Psychology, 39(4), 393-398

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 "Synchronization" technique?

Synchronisation refers to the mutual, often unconscious adjustment of behaviours between two speakers: speech rhythm, posture, gestures and breathing eventually fall into step with one another when a relationship “clicks”. Far from being a trick to apply mechanically, it is first and foremost a symptom of rapport: people who are in sync are so because they are in accord, not the other way round. In negotiation, the challenge is to sustain this natural convergence without ever slipping into caricatured imitation.

Is the "Synchronization" 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 "Synchronization"?

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

What is the "Synchronization" 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 "Synchronization" 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 "Synchronization" 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 "Synchronization" 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 Synchronization and anchor it through examples.

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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
278 Body Mirroring 279 Calibration 281 Pace Variation 282 Occupying the Space 283 Eye-Contact Management 284 Body Positioning

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

    Synchronisation refers to the mutual, often unconscious adjustment of behaviours between two speakers: speech rhythm, posture, gestures and breathing eventually fall into step with one another when a relationship “clicks”. Far from being a trick to apply mechanically, it is first and foremost a symptom of rapport: people who are in sync are so because they are in accord, not the other way round. In negotiation, the challenge is to sustain this natural convergence without ever slipping into caricatured imitation.

  • 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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276 The Alternative Close (variant) 278 Body Mirroring 275 The Summary Close 279 Calibration
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