Like something

Business relationships are supposedly based on rational decisions—price, performance, and quality should be what matters. Likeability is nice to have, but ultimately irrelevant for professional purchasing decisions, or so the assumption goes. Yet sales teams consistently report otherwise: the best pitch fails when the chemistry isn't right. Identical offers are evaluated differently depending on how likeable the provider appears. The question is: How strongly does personal likeability actually influence business decisions? Which factors generate likeability, and can this effect be systematically leveraged? What does the evidence tell us?

Studies

The Tupperware Party Study

Robert Cialdini analyzed the extraordinary success of Tupperware parties in the 1980s. Hostesses invited friends, and a representative presented products. The remarkable finding: the purchase rate exceeded 80%, even though the products cost no less than in retail stores. Cialdini identified the mechanism: attendees purchased not primarily because of product quality, but because of their relationship with the hostess. A refusal would have strained the friendship. The liking for the hostess transferred to the products. Tupperware systematically leveraged the liking effect: people prefer to buy from friends rather than strangers—even when the offer is identical. Average sales per party exceeded $400, significantly higher than traditional direct sales.

The Similarity Experiment

Jerry Burger and colleagues conducted an elegant experiment at Santa Clara University in 2004 on the power of similarity. Students completed a questionnaire and were then approached by a confederate (posing as another student) with a favor request: to read a term paper and provide feedback—a considerable time commitment. In one condition, the confederate had earlier "coincidentally" mentioned sharing the same birthday. In the control condition, the birthdays differed. The remarkable result: 62% of participants with matching birthdays agreed to help, compared to only 34% in the control group. A trivial commonality—sharing a birthday—nearly doubled compliance. A follow-up study using matching first names produced a similar effect, with agreement rates of 56% versus 36%. Even superficial similarities generate liking and dramatically increase compliance.

Principle

Which principle for Customer Experience Design can be derived from this? The Liking Principle states that systematic rapport-building should precede persuasion efforts, as people make decisions primarily on emotion and only secondarily on reason. In customer experience, this means companies must first invest in the relationship—through similarity, familiarity, cooperation, or positive associations—before presenting their arguments. This approach proves particularly effective in consultation-intensive industries and complex purchase decisions where trust is crucial. However, the principle only works with authentic liking; manipulative attempts are quickly detected and backfire. The following guidelines demonstrate how to implement this principle in practice.

Guidelines

Make commonalities explicit

Systematically identify commonalities with customers and communicate them early in the interaction. These can include shared values, similar challenges, mutual interests, or even minor similarities. In sales conversations: "We've solved exactly this challenge for companies your size." On websites: "Developed by founders for founders." In support interactions: "I understand—I had the same problem myself." Similarity is the fastest path to rapport.

Show authentic appreciation

Integrate genuine, specific compliments into customer interactions—but only when authentic. Avoid generic phrases like "You are a valued customer." Instead, say: "Your question shows you've really engaged with our product—we rarely see such thoughtful consideration," or "The way you described the problem was extremely helpful to us." Compliments about a customer's competence, diligence, or willingness to cooperate strengthen mutual rapport. Critical point: Exaggeration feels manipulative. Only offer compliments you genuinely mean.

Show human faces

Make your team visible and human. Use real photos instead of stock images, names instead of job titles, and brief personal stories. On your website, create a team page with photos and a one-sentence description of each person's hobbies or motivation. In emails, include signatures with photos. In customer support, display profile pictures of the responsible employee. The principle is simple: people build rapport with people, not with logos or anonymous systems. While physical attractiveness plays a role (unfortunately), authenticity and accessibility matter more. The mere-exposure effect amplifies this dynamic: the more often customers see the same faces, the more familiar and likeable those individuals become.

Cooperative instead of transactional language

Frame interactions as cooperation, not transactions. Instead of "What can I do for you?" use "Let's find a solution together." Instead of "We offer you..." use "Together we achieve..." Language choice activates different frames: Cooperation signals shared goals and generates liking. Transaction emphasizes exchange and triggers cost-benefit calculations. Cialdini demonstrated that cooperation toward a common goal is one of the strongest drivers of liking. This applies linguistically as well—even small changes in wording shift perception from "seller versus buyer" to "partners with shared interests."