Liking Bias Explained: How Likability Clouds Your Judgment

I was sitting in the classroom with my classmates, in what I’d later recognize as my first real-life encounter with Liking Bias. Our teacher—newly appointed and only with us for a few months— had to teach us primary school mathematics. He was a bit aggressive, quick-tempered, and easily provoked.

One day, he ordered all the boys in the class to stand up and line up in a single file at the blackboard. Among us, a few kids hadn’t paid much attention to their personal hygiene that morning.

Our teacher then called the girls to step up in front of the line. He asked them to inspect us. Then they had to rank us: who was clean, who was cleaner, who was the best dressed. In short, he staged a makeshift beauty contest.

The judges were the girls; the contestants were us.

Neither I nor most of my friends made the cut. The girls overwhelmingly selected a classmate, citing that he dressed more tidy than the rest of us. The teacher echoed their reasoning and instructed the rest of us to come back the following week cleaner and better.

Most of us had gotten haircuts, polished our shoes, and put on spotless clothes. We’d trimmed our nails and paid attention to our looks — at least as much as any ten-year-old could manage.

Once again, the teacher lined us up at the blackboard. Once again, he called the girls to make their choice. And once again, the girls chose the same classmate. Nobody else. At least, some of us had more votes that time. 

What is the Liking Bias?

For anyone reading this, the scenario might sound alarming—a teacher fostering early gender divisions and exposing children to public discrimination. However, the true insight lies in a different perspective: Why did the girls choose the exact same boy a second time, even when every single child was clean?

Those ten- and eleven-year-old girls were experiencing a manifestation of a fundamental cognitive trap that affects adults every day: the Liking Bias.

The Liking Bias is a cognitive pattern where this bias severely distorts our decision-making. Instead of evaluating something based on its objective worth or rational value, we choose it simply because of the sympathy or affection we feel toward the person presenting it.

Because this bias is simple and deeply ingrained, we fall into it constantly—both in daily life and in our high-stakes choices. Businesses, corporations, and politicians exploit it constantly.

The Three Pillars of Attraction Behind Liking Bias

According to behavioral research, humans tend to like others based on three main factors:

• Visual Appeal: We are naturally drawn to things and people that are visually pleasing and attractive.
• Familiarity and Proximity: We favor people who feel close to us—whether through shared origins, character traits, worldviews, or hobbies.
• Behavioral Similarity: We instinctively like people who mirror our traits or share identical interests.

In Influence: The Psychology of Persuasion, Robert Cialdini describes an experiment showing that just two things were enough to drive a sale: a fair price and someone people liked buying from.

The Mirroring Technique: Liking Bias in Negotiation

Take, for example, the widespread mirroring technique that negotiation experts often teach. By subtly copying your gestures, sentence structures, or pacing, the other person signals that they think like you. They are intentionally triggering your Liking Bias, encouraging you to ignore objective data and make a decision based on emotional pleasantness. Without this bias steering the wheel, a strictly rational analysis might lead you to walk away from the deal entirely.

“Mirroring is simply repeating what someone just said. It creates more reception from the other side, it focuses attention, and it gives them an opportunity to dial in more with you and you to dial in more with them.”

Chris Voss

Liking Bias in Action: Use Cases From Different Fields

Political Campaigns

In the same way, politicians are master practitioners of this phenomenon. To secure votes and public favor, they make active efforts to think, look, and live like their electorate. They visit local communities, adopt regional attire, express support for local traditions, and mirror the language of the crowd. While genuine empathy plays a role, the strategic imperative in politics is clear: establish a personal narrative and convince the public that you are one of them.

Sales and Negotiation

Similarly, whether in B2B or B2C environments, effective sales revolves around human connection. An experienced salesperson knows that clients rarely buy from someone who creates friction or argues with them. Even when faced with harsh or unreasonable client reactions, professional sellers stay constructive and de-escalate tension.

Consider the famous scene in The Wolf of Wall Street, where Leonardo Di Caprio’s character hands a pen to an associate and says, “Sell me this pen.” The test isn’t about listing product features; it’s about understanding the buyer. Anecdotal evidence suggests that sales professionals who actively listen and trigger the Liking Bias consistently outperform those who rely purely on technical specs.

Brand Marketing

For instance, global brands frequently localize their campaigns using regional figures, familiar cultural motifs, and relatable storylines. The goal is to signal: “We are like you, we understand your values, and we belong in your world.” If you analyze your favorite advertisements, you will often find that what made them memorable was not technical information, but how effectively they tapped into your sense of affinity.

Corporate Recruitment and Leadership

Beyond sales and politics, in corporate life the Liking Bias frequently creeps into promotions and recruitment. Teams and inner circles often default to hiring or elevating individuals who blend in socially or mirror the existing leadership.

The performance review is not just about objective business outcomes but also the connection between executives and employees that related emotions, perception, and sympathy. (Wayne & Liden, 1995)  

This tendency often overlaps with another bias decision-makers fall into: favoring a candidate whose résumé simply confirms what they already believe makes a ‘good fit’ — a pattern explored in Confirmation Bias: How Overconfidence Leads to Poor Decisions. However, while selecting someone with a familiar worldview feels safer, it starves organizations of diversity.

Historically, the most resilient teams don’t form echo chambers — they bring together individuals with contrasting viewpoints unified by a shared vision. Leaders throughout history — such as Abraham Lincoln, Winston Churchill, Mustafa Kemal Atatürk, and Nelson Mandela —built strength by bringing together dissenting voices and channeling their differences toward a common objective.

How to Overcome Liking Bias Tomorrow

Here are three ways to stop Liking Bias from hijacking your choices:

• Check Your Emotional State: First, when evaluating a proposal, purchase, or hire, check your emotional stance toward the person making the pitch. Ask yourself directly: Do I like this person?
• Separate the Person from the Offer: Next, write down the objective, measurable criteria for your decision on paper. Then ask: “If someone I deeply dislike brought me this exact proposal, how would I evaluate it?”
• Defend Against Urgency: Finally, people leveraging the Liking Bias often push for quick decisions. If you feel pressured, intentionally slow down — the same discipline that helps you resist the Sunk Cost Fallacy applies here: a good decision shouldn’t be rushed by someone else’s timeline.

References

• Cialdini, R. B. (2021). Influence: The psychology of persuasion (New, expanded ed.). Harper Business. 
• Wayne, S. J., & Liden, R. C. (1995). Effects of impression management on performance ratings: A longitudinal study. Academy of Management Journal, 38(1), 232–260.

Disclaimer: The views and opinions expressed in this article are solely my own and do not reflect the official policy or position of any past, present, or future employer or affiliated organisation. This content is intended for informational and educational purposes only and does not constitute professional advice.