Questions: Liking Principle and Source Attractiveness in Persuasion

Question 1

A car salesperson mentions early in the conversation that they also grew up in your hometown and love the same hiking trail you mentioned. Later they ask you to sign a contract that day. The best diagnostic question to assess whether the liking principle is at work is:

• A. Is this car priced competitively compared to other dealerships?
• B. Does the salesperson have good reviews online?
• C. Would I find this request equally compelling if it came from a stranger I had no rapport with?
• D. Did the salesperson mention the shared connection before or after discussing the car's features?

Answer: (C)

Cialdini's diagnostic question for detecting liking-based influence is: 'Would I find this request as persuasive if it came from someone I had no relationship with?' If the answer is no, liking — not the merits of the request — is doing the persuasive work. The salesperson's manufactured rapport (shared hometown, shared interests) is a classic deployment of similarity-based liking. The other options assess the merits of the deal, not whether the relationship is distorting your evaluation.

Question 2

Physical attractiveness increases persuasion primarily because:

• A. Attractive people tend to construct better arguments that are easier to follow
• B. The attractiveness halo leads people to attribute competence and trustworthiness to attractive sources, bypassing careful argument evaluation
• C. People are statistically more likely to be correct in their judgments, so attractiveness is a valid proxy for accuracy
• D. Attractive speakers make audiences more comfortable asking clarifying questions, which improves comprehension

Answer: (B)

The attractiveness halo effect means that people rate physically attractive individuals as more competent, intelligent, honest, and trustworthy — even without behavioral evidence. This halo bypasses careful scrutiny of message content: instead of evaluating the argument, the listener uses attractiveness as a peripheral cue that the source is credible. Option A confuses cause and effect — attractiveness creates the perception of good arguments, not the other way around.

Question 3

Awareness that someone is flattering you is sufficient to neutralize the liking-increasing effect of their compliments.

• T. True
• F. False

Answer: False

Experimental evidence shows that compliments increase liking even when the recipient suspects flattery — the effect is remarkably resistant to discounting. People cannot simply think their way out of this effect once they recognize it. The flattery still registers affectively even when cognitively flagged as potentially insincere. This is why intellectual awareness of the liking principle provides only partial protection against it.

Question 4

The liking principle operates primarily through the peripheral route, meaning that liking functions as a heuristic cue that substitutes for careful evaluation of argument quality.

• T. True
• F. False

Answer: True

In dual-process models of persuasion, the peripheral route involves using surface cues — source characteristics, emotional context, social proof — rather than scrutinizing the argument itself. Liking is a classic peripheral cue: it activates a heuristic ('people who are similar to me and friendly toward me are trustworthy') that produces compliance or agreement without requiring deep engagement with the message. This is distinct from central-route processing, where persuasion occurs through careful evaluation of argument quality.

Question 5

Why is the heuristic 'trust people you like' reasonable in most everyday contexts, and under what conditions does it become a vulnerability?

Model answer: The heuristic is reasonable because, in naturally occurring relationships, people who are similar to us, familiar to us, and cooperative with us genuinely tend to share our interests and give reliable information. Liking typically tracks real signals of trustworthiness. It becomes a vulnerability when the conditions that generate genuine liking — shared history, real similarity, actual cooperation — are deliberately manufactured to trigger compliance with requests that the person would otherwise evaluate more critically. The problem is structural: the heuristic cannot distinguish authentic liking from engineered rapport.

The heuristic is not irrational in origin — it reflects a generalizable pattern in social life. The problem is that evolved shortcuts can be reverse-engineered and exploited. A salesperson who spends ten minutes establishing artificial rapport before making a request is exploiting the mechanism that evolved to help us identify trustworthy in-group members. Understanding the origin of the heuristic makes the diagnostic question useful: it asks you to strip away the liking and evaluate whether the request stands on its own merits.