# Liking Factors — Research Evidence Full citations and study data supporting the five liking factors from Chapter 5 of *Influence: The Psychology of Persuasion* by Robert B. Cialdini. --- ## Factor 1: Physical Attractiveness ### The Halo Effect Mechanism Physical attractiveness triggers a "click, whirr" automatic response — a halo effect where one positive characteristic (good looks) dominates how a person is perceived across ALL other dimensions. People automatically attribute favorable traits to good-looking individuals: talent, kindness, honesty, and intelligence. These judgments happen without awareness. ### Key Research Findings **Canadian federal elections study:** - Attractive candidates received more than 2.5 times as many votes as unattractive candidates - Follow-up research: 73% of Canadian voters denied their choices were influenced by physical appearance; only 14% even allowed for the possibility of such influence - Implication: the halo effect operates below conscious awareness — people cannot self-report it accurately **Pennsylvania criminal trial study:** - Researchers rated physical attractiveness of 74 male defendants at the start of criminal trials - Checked court records for outcomes later - Handsome men received significantly lighter sentences - Attractive defendants were TWICE as likely to avoid jail as unattractive ones - Effect held for both male and female jurors **Negligence damages study (staged trial):** - Better-looking defendant vs. victim: average compensation to victim = $5,623 - More attractive victim: average compensation = $10,051 - Attractiveness of the victim dramatically increased damages awarded **Helping and persuasion studies:** - Attractive people are more likely to obtain help when in need - Attractive people are more persuasive in changing audience opinions - Both sexes respond the same way; effect holds even for same-sex interactions - Exception: when the attractive person is a direct romantic rival **Hiring study:** - Good grooming in a simulated employment interview accounted for more favorable hiring decisions than job qualifications - Interviewers claimed appearance played a small role — their actual decisions showed otherwise **Children:** - Adults view aggressive acts by attractive children as less naughty - Teachers presume good-looking children are more intelligent than less-attractive classmates - Social benefits of good looks begin accumulating early in childhood ### Industry Applications - Sales training programs include grooming hints - Fashionable clothiers staff showrooms from attractive candidate pools - Con men and con women are specifically selected for their appearance - Car dealerships, real estate agencies, and financial services firms systematically hire based on appearance --- ## Factor 2: Similarity ### Mechanism We like people who are similar to us. The similarity can be in opinions, personality traits, background, lifestyle, dress, values, age, religion, politics — virtually any dimension. The more dimensions of similarity, the stronger the liking. ### Key Research Findings **Dress similarity study (early 1970s):** - Experimenters dressed as hippies or "straight" college students approached campus students for a dime - Same-dressed requester: request granted more than two-thirds of the time (>67%) - Different-dressed requester: request granted less than half the time (<50%) - Result is automatic — subjects don't deliberate; they respond to the similarity signal directly **Antiwar demonstration petition study:** - Marchers signed petitions from similarly dressed requesters more readily - AND signed without even reading the petition first - Implication: similarity bypasses critical evaluation entirely **Insurance company study:** - Customers more likely to buy insurance from salesperson who was like them in age, religion, politics, and cigarette-smoking habits - Small similarities (any dimension) can be effective — the category is broad **Car salesman training practice:** - Trained to scan trade-in vehicles for evidence of customer's background and interests: - Camping gear in trunk → mention camping interest later - Golf balls on back seat → mention scheduled golf game - Out-of-state purchase → ask if customer is from that state - These manufactured similarities appear to work; the customer experiences them as genuine connection **Mirror and match:** - Modern sales training programs instruct trainees to mirror customer body posture, verbal style, and language - Similarity along physical dimensions has been shown to lead to positive results ### Caution: Manufactured Similarity Cialdini explicitly warns: "Because even small similarities can be effective in producing a positive response to another and because a veneer of similarity can be so easily manufactured, I would advise special caution in the presence of requesters who claim to be 'just like you.'" --- ## Factor 3: Compliments ### Mechanism Humans have an automatic positive reaction to flattery. Even when the praise is obviously insincere, even when the recipient knows the flatterer is trying to manipulate them, and even when the praise is objectively false — compliments still produce liking and compliance. ### Key Research Findings **North Carolina men study:** - Men received comments from another person who needed a favor from them - Three conditions: (1) only positive comments, (2) only negative comments, (3) mix of positive and negative - Three key findings: 1. The evaluator who provided only praise was liked best 2. This was true even though the men fully realized the flatterer stood to benefit from their liking 3. Pure praise did not have to be accurate to work — positive comments produced just as much liking for the flatterer when they were untrue as when they were true ### Joe Girard Case Study - Joe Girard held the Guinness World Record as "world's greatest car salesman" for 12 consecutive years - Averaged more than 5 cars and trucks sold every day he worked - Made more than $200,000/year as a floor salesman (not owner, not executive) - His formula: "It consisted of offering people just two things: a fair price and someone they liked to buy from." - Each month he sent every one of his 13,000+ former customers a holiday greeting card - The message printed on the face of the card never varied: **"I like you."** - Card changed monthly (Happy New Year, Happy Thanksgiving, etc.) but the message was always "I like you" - "There's nothing else on the card. Nothin' but my name. I'm just telling 'em that I like 'em." - Mailing cost: well over 150,000 cards per year Joe's insight: "We are phenomenal suckers for flattery. Although there are limits to our gullibility — especially when we can be sure that the flatterer is trying to manipulate us — we tend, as a rule, to believe praise and to like those who provide it, oftentimes when it is clearly false." --- ## Factor 4: Familiarity and Contact ### Mechanism We are more favorable toward things we have had contact with. Mere exposure increases liking. However — critically — this effect only holds under positive conditions. Contact under negative, competitive, or frustrating conditions WORSENS liking. ### Key Research Findings **Photo preference study:** - Subjects shown a photograph of their own face (true print) vs. mirror image of their face - The subject preferred the mirror image (what they see in the mirror every day) - Their friends preferred the true print (what the world sees) - Both groups are responding favorably to the more familiar version of the face **Face-flashing exposure study:** - Faces flashed on a screen so briefly subjects couldn't consciously register them - Subjects were unable to recall seeing any of the faces later - But: the more frequently a face was flashed, the more the subjects came to like that person in a subsequent meeting - AND: these subjects were also more persuaded by the opinion statements of individuals whose faces had appeared most frequently **Ohio attorney general race:** - A man given little chance of winning swept to victory when he changed his name to "Brown" shortly before the election — a name with strong Ohio political tradition - Familiarity with the name, not familiarity with the person, was enough ### The Critical Caveat: Contact Requires Cooperation **Robbers Cave experiment (Muzafer Sherif):** - Boys at summer camp divided into two groups (Eagles and Rattlers) - Competitive phase: cabin treasure hunts, athletic contests → name-calling, raids, threatening signs, physical friction - Mere contact + competition = escalating hatred **Resolution (cooperative phase):** - Series of situations where competition would harm everyone's interests; cooperation was necessary for mutual benefit - Stuck truck (all had to push together for food run), interrupted water supply (required joint repair), pooled money for a desired movie - Result: verbal baiting stopped, jostling ended, boys began to mix at meal tables, cross-group friendships formed, hostile attitude reversed **Jigsaw classroom (Elliot Aronson, Texas schools):** - Students formed into cooperative learning teams; each student held one piece of the information needed for the test - Must take turns teaching each other; everyone needs everyone else to do well - Results vs. traditional competitive classrooms: significantly more cross-group friendship, less prejudice between ethnic groups, improved self-esteem, higher test scores for minority students, equivalent performance for white students - Carlos case study: a Mexican-American boy initially ridiculed became valued as a teammate when his peers needed his information to pass; they came to like him **Why traditional school desegregation often fails:** - School setting is primarily competitive (students competing for teacher approval) - Contact under competition → increased prejudice, not decreased - This explains why raw desegregation "so frequently produces increased rather than decreased prejudice" ### Application for Compliance Professionals - Compliance professionals "manufacture" cooperation: the new-car salesman who "takes your side" and "does battle" with the sales manager is manufacturing cooperation - Good Cop/Bad Cop (see separate reference) is the law enforcement version of manufactured cooperation --- ## Factor 5: Conditioning and Association ### Mechanism People are connected to the things they are associated with, both positive and negative. We like/dislike people based on what they are linked to — even when the person had no causal role. This is classical Pavlovian conditioning applied to social liking. ### Key Research Findings **Razran's luncheon technique (1930s):** - Subjects shown political statements they had rated before, presented during food consumption - Only statements presented while subjects were eating gained in approval - Changes appeared to occur unconsciously — subjects could not remember which statements they had seen during the food service - The positive feeling of eating transferred to the associated ideas **Pavlov connection:** - Razran was one of the earliest translators of Russian psychological literature into English — directly influenced by Pavlov's work - Pavlov: a dog salivates at a bell if the bell was always paired with food - Razran's insight: any normal response to food (including positive feelings) can transfer to anything associated with it **Persian messengers:** - Ancient Persia: messengers bringing news of military victory were treated as heroes (food, drink, women of their choice) - Messengers bringing news of military defeat were summarily slain - The messenger did not cause the news; they were merely associated with it **TV weather forecasters:** - Routinely disliked for bad weather they did not cause and cannot control - Being connected with sunshine versus bad weather measurably affects forecaster popularity - "The nature of bad news infects the teller" (Shakespeare) **Negative association study (University of Georgia):** - Students told to inform another student of either good or bad news - When news was positive: "You just got a phone call with GREAT news — better see the experimenter for details" - When news was negative: "You just got a phone call. Better see the experimenter for the details" (distanced themselves) - People naturally manage association by connecting themselves to positive events and separating from negative ones **Sports association — basking in reflected glory:** - Cialdini study: school sweatshirts more common on Monday mornings at 7 universities when team won the prior Saturday - "We won" vs. "They lost" pronoun study: students used "we" for team victories, distanced pronouns for losses - After general knowledge test failure, students showed greatest need to proclaim team wins — image damage drives reflected glory seeking - New Orleans Saints fans wearing paper bags over heads after losses; discarding bags as the team started winning ### Brand Applications - Automobile ads: attractive young models photographed with cars → beauty traits transfer to the car - Men who saw car ad with seductive model rated the car as faster, more appealing, more expensive, better designed — and denied the model had influenced their judgment - Celebrity endorsement: professional athletes paid to connect themselves to products (relevant OR irrelevant — the connection is what matters, not its logic) - Cultural moment association: during first moon shot, everything was marketed with space program allusions - "Natural" branding era (1970s): products associated with naturalness to transfer those values - Radio station call-letter jingles played immediately before big hit songs → positive feeling of the song transfers to the station brand - Tupperware: women yell "Tupperware!" instead of "Bingo!" so the prize celebration is conditioned to the brand name ### Positive vs Negative Association - Mothers teach association avoidance: "you'll be known by the company you keep" - People work to publicize their connections to winners and conceal connections to losers - Stage mothers, name-droppers, and groupies all exploit positive association for personal prestige