We say yes more readily to those we like. The liking principle consists in activating the levers of appreciation, similarity, sincere compliments, cooperation towards a common goal and familiarity, in order to make the other party more inclined to agree.
Grounding in the source schoolSchool grounded in experimental research
Indicative profile: it situates the “Psychological influence” family as the Cognitive science 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 8.3/10 (effectiveness, impact, discretion) and vigilance high (relational and ethical risk): two distinct readings, deliberately never merged into a single score that would reward risk. NEGOCOACH editorial rating calibrated from the “Psychological influence” family and the “Cognitive science” school. Each criterion is rated out of 10; click to understand what it measures.
Effectiveness8/10 · Very high
How far the technique can carry the negotiation in the intended direction when it is well executed.
Psychological impact10/10 · Very high
Strength of the effect produced on the counterpart's perceptions, emotions and decisions.
Discretion7/10 · High
How hard it is for the other party to notice the technique is being used. A high value = very discreet.
Preparation6/10 · High
The information, analysis and rehearsal required upfront to use it effectively.
Relational risk5/10 · Moderate
Potential cost to the relationship and to trust if the technique is spotted, refused or fails. A high value = riskier.
Ethics4/10 · Moderate
Moral acceptability: fairness, transparency and respect for the counterpart's autonomy. A high value = more defensible.
Level of evidence
School grounded in experimental research
The school this technique stems from is grounded in replicated, peer-reviewed experimental work. This indicator qualifies the school, not the experimental validation of 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.
Overview of the LIKING PRINCIPLE
Origin & history
The principle of “liking” is one of the six levers of influence identified by Robert Cialdini in Influence (1984), drawing on decades of research in social psychology and the study of persuasion professionals. Cialdini shows that several factors trigger appreciation almost automatically: similarity (we like those who resemble us), compliments, repeated contact, association with positive things, and cooperation. These levers, which salespeople exploit intuitively, have a massive and often unconscious effect on the decision.
Definition and principle
The technique consists in building a genuine store of goodwill before negotiating: finding real common ground, sincerely acknowledging the other party's qualities, and cooperating towards a shared objective. Appreciation lowers defences and makes yes easier.
Concrete examples of application
Application by context
The same technique, across several negotiation settings
A salesperson identifies a shared interest with the client and sincerely compliments them on a choice: the warmer relationship makes agreement easier.
Context 2 / 6
Labour negotiation
A negotiator highlights shared values and the common objective with the representatives, creating a climate conducive to compromise.
Context 3 / 6
Crisis management
The mediator seeks points of human connection with the person, the liking thus created opening the way to dialogue.
Context 4 / 6
Political negotiation
Two delegations foreground a shared history or common interests to warm up strained relations.
Context 5 / 6
Real-estate negotiation
An agent builds a genuine connection with the seller (background, attachment to the neighbourhood), which smooths the whole negotiation.
Context 6 / 6
Family negotiation
In a dispute, recalling emotional bonds and shared happy memories predisposes everyone towards conciliation.
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
Heavy flattery
Appeals to guilt or fear
Creating a moral debt
Neutralise
The counters that defuse it
Separate the emotion from the substance
Defer your answer
Come back to facts and figures
Turn around
Turn it into an advantage
Verbalise the lever: "I feel you're playing on guilt", and naming it defuses it.
The trap to avoid
Mistaking an emotional bond for an objective argument.
Strengths and weaknesses
Liking is a powerful, universal and pleasant lever that eases everything else in the negotiation. Its limits: forced or self-serving (false familiarity, flattery), it turns into distrust; it does not replace substance and can be exploited by a manipulator.
When to use this technique?
Useful at the outset and throughout a relationship-based negotiation. To be built on sincerity; to be watched on the defensive side, as a sudden excess of liking from the other party may conceal an attempt at influence.
Objectives of the technique
Reduce psychological distance and establish a climate of trust that lowers the other party's defensive posture.
Increase the likelihood of a “yes” by drawing on the drivers of liking (similarity, sincere compliments, cooperation towards a common goal).
Facilitate reciprocal concessions: we negotiate more flexibly with someone we like.
Create a lasting relationship beyond the one-off agreement, useful in repeated negotiations.
Defuse aggression and transform an adversarial relationship into one of joint problem-solving.
Famous cases
Sales · The sale through perceived similarity: In the preamble, a salesperson discovers that they share with their prospect the same region of origin and a passion for sailing. He invents nothing: he sincerely underlines this real common ground before turning to the offer. The climate becomes markedly more cooperative, the prospect lowers their guard and listens to the arguments with goodwill rather than suspicion. This scenario illustrates the mechanism of similarity described in research on liking: we more readily extend our trust to those who resemble us.
Diplomatic · The personal bond between negotiators: In many international negotiations, diplomats deliberately invest time in informal meals and personal exchanges before the formal sessions. The representative aim: to build genuine liking that makes later concessions psychologically easier and reduces the risk of escalation. The human relationship becomes an asset that cushions tensions over substance.
Common mistakes
Confusing liking with flattery: compliments that are plainly self-serving or exaggerated are perceived as manipulation and destroy trust.
Feigning common ground that does not exist: false similarity, once exposed, rebounds violently against the negotiator.
Disarming oneself: liking the other party must not lead one to give away one's interests or to lower one's guard on the substance of the agreement.
Neglecting substance: liking opens the door but does not replace a sound argument and solid preparation.
Applying the lever mechanically and uniformly, without regard to the counterpart's culture or personality (some prefer professional distance).
Limits and ethics
The lever identified by Cialdini is not in itself deceptive: we do indeed say yes more readily to those we like, and there is nothing reprehensible about making oneself likeable. Seeking what genuinely brings you closer to a counterpart, cooperating towards a common goal, sincerely acknowledging what they do well, all of this improves the negotiation and life. The definition of the technique moreover contains the word that draws the line: “sincere compliments”. Everything else tips over. Manufacturing a resemblance one does not have, conveniently discovering a shared passion, calibrating flattery to what the other needs to hear, that is simulating affinity to reap what it yields. The device has a practical limit worth knowing: manufactured liking is fragile and testable, a single detail that does not fit is enough to make it collapse, and the counterpart then rereads the whole relationship as a calculation. One must add a limit that applies to you: the liking others feel for you is also a hold on you, and the most dangerous negotiator is often the most charming. Seeking what truly brings people closer is a courtesy; manufacturing a resemblance in order to be liked is an imposture.
Scientific foundations
Robert B. Cialdini (2021) Influence: The Psychology of Persuasion (New and Expanded) Harper Business
Roger Fisher, William Ury & Bruce Patton (2011) Getting to Yes: Negotiating Agreement Without Giving In Penguin Books
Quick exercise
Test yourself before answering
Answer in your head, then reveal the solution. Memory is built through active recall.
1Quels signaux doivent vous alerter ?
Heavy flattery
Appeals to guilt or fear
Creating a moral debt
2Quelles parades appliquer ?
Separate the emotion from the substance
Defer your answer
Come back to facts and figures
Frequently asked questions
The questions we get most
What is the "The Liking Principle Technique" technique?
We say yes more readily to those we like. The liking principle consists in activating the levers of appreciation, similarity, sincere compliments, cooperation towards a common goal and familiarity, in order to make the other party more inclined to agree.
Is the "The Liking Principle Technique" 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 "The Liking Principle Technique"?
Mistaking an emotional bond for an objective argument. The right reflex: separate the emotion from the substance.
What is the "The Liking Principle Technique" 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 (Cognitive science): school grounded in experimental research. 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 "The Liking Principle Technique" 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.
Play the role of my counterpart in a negotiation. I am going to test the "The Liking Principle Technique" technique. React realistically and with resistance, do not give in too quickly, then at the end analyse my performance and suggest 3 concrete improvements.
Here is how my negotiation went: [paste the exchanges]. Analyse whether the "The Liking Principle Technique" technique was used well, what worked, the mistakes made, and spell out precisely what I could have done better.
Founding works of the 🧠 Cognitive science school this technique belongs to.
Influence, The Psychology of Persuasion
Book
R. Cialdini · 1984
The founding work on the mechanisms of persuasion: six universal principles (reciprocity, consistency, social proof, authority, liking, scarcity) illustrated with striking experiments. A landmark in social psychology.
Thinking, Fast and Slow
Book
D. Kahneman · 2011
The sum of Kahneman's work on decision-making: two systems of thought, one fast and intuitive, the other slow and analytical, and the long list of biases that distort our judgements. Essential to understanding others... and yourself.
Nudge
Book
R. Thaler & C. Sunstein · 2008
How to steer choices without constraint, by acting on the "choice architecture". The book popularised the nudge and behavioural economics applied to public policy as much as to management.
Judgment under Uncertainty: Heuristics and Biases (Science)
Article
A. Tversky & D. Kahneman · 1974
The founding paper (Science, 1974) that uncovered the heuristics and biases of judgement, including anchoring. The starting point of the behavioural-economics revolution.
R. Cialdini ("Influence", 1984), D. Kahneman & A. Tversky, R. Thaler, D. Ariely.
The author
Author
On video
See the technique in action
Videos to picture The Liking Principle Technique and anchor it through examples.
We say yes more readily to those we like. The liking principle consists in activating the levers of appreciation, similarity, sincere compliments, cooperation towards a common goal and familiarity, in order to make the other party more inclined to agree.
The right reflex
Verbalise the lever: "I feel you're playing on guilt", and naming it defuses it.
Never do this
Mistaking an emotional bond for an objective argument.
8.3/10 tactical potential High vigilance School grounded in experimental research
Master this technique in real situations?
Our programmes turn theory into a concrete advantage.
