Influence: The Psychology of Persuasion by Robert Cialdini

A wellknown principle of human behavior says that when we ask someone to do us a favor we will be more successful if we provide a reason. People simply like to have reasons for what they do. 

…quality of modern life when he asserted that “civilization advances by extending the number of operations we can perform without thinking about them” 

Once the customer had found a suit he liked and had asked for the price, Sid would call to his brother, the head tailor, at the back of the room, “Harry, how much for this suit?” Looking up from his work—and greatly exaggerating the suit’s true price—Harry would call back, “For that beautiful all-wool suit, forty-two dollars. ” Pretending not to have heard and cupping his hand to his ear, Sid would ask again. Once more Harry would reply, “Forty-two dollars. ” At this point, Sid would turn to the customer and report, “He says twenty-two dollars. ” Many a man would hurry to buy the suit and scramble out of the shop with his “expensive = good” bargain before Poor Sid discovered the “mistake”. 

Before we invited them to serve as unpaid chaperons on the zoo trip, we asked them for an even larger favor—to spend two hours per week as a counselor to a juvenile delinquent for a minimum of two years. It was only after they refused this extreme request, as all did, that we made the smaller, zoo-trip request. By presenting the zoo trip as a retreat from our initial request, our success rate increased dramatically. Three times as many of the students approached in this manner volunteered to serve as zoo chaperons.

Research conducted at Bar-Ilan University in Israel on the rejection-then-retreat technique shows that if the first set of demands is so extreme as to be seen as unreasonable, the tactic backfires. In such cases, the party who has made the extreme first request is not seen to be bargaining in good faith…

the percentage of successful door-to-door sales increases impressively when the sales operator is able to mention the name of a familiar person who “recommended” the sales visit

Many individuals who would not otherwise subject their friends to a high-pressure sales presentation do agree to supply referrals when the request is presented as a concession from a purchase request they have just refused

You would be wise to study the approach taken by social psychologist Steven J.Sherman. He simply called a sample of Bloomington, Indiana, residents as part of a survey he was taking and asked them to predict what they would say if asked to spend three hours collecting money for the American Cancer Society. Of course, not wanting to seem uncharitable to the survey taker or to themselves, many of these people said that they would volunteer. The consequence of this sly commitment procedure was a 700 percent increase in volunteers when, a few days later, a representative of the American Cancer Society did call and ask for neighborhood canvassers. 

When tried alone, that request (labeled the “standard solicitation approach”) produced only 18 percent agreement. However, if the caller initially asked, “How are you feeling this evening?” and waited for a reply before proceeding to the standard approach, several noteworthy things happened. First, of the 120 individuals called, most (108) gave the customary favorable reply (“Good,” “Fine,” “Real well,” etc.). Second, 32 percent of the people who got the “How are you feeling tonight” question agreed to receive the cookie seller at their homes, nearly twice the success rate of the standard solicitation approach

What may occur is a change in the person’s feelings about getting involved or taking action. Once he has agreed to a request, his attitude may change, he may become, in his own eyes, the kind of person who does this sort of thing, who agrees to requests made by strangers, who takes action on things he believes in, who cooperates with good causes

It’s this second, general kind of influence concealed within small commitments that scares me. It scares me enough that I am rarely willing to sign a petition anymore, even for a position I support. Such an action has the potential to influence not only my future behavior but also my self-image in ways I may not want.

His behavior tells him about himself; it is a primary source of information about his beliefs and values and attitudes. Understanding fully this important principle of self-perception, the Chinese set about arranging the prison-camp experience so that their captives would consistently act in desired ways.

According to the sales-training program of a prominent encyclopedia company, that personal commitment alone has proved to be “a very important psychological aid in preventing customers from backing out of their contracts. ” Like the Amway Corporation, then, these organizations have found that something special happens when people personally put their commitments on paper: They live up to what they have written down.

No matter which variety of lowballing is used, the sequence is the same: An advantage is offered that induces a favorable purchase decision; then, sometime after the decision has been made but before the bargain is sealed, the original purchase advantage is deftly removed. 

Sales and motivation consultant Cavett Robert captures the principle nicely in his advice to sales trainees: “Since 95 percent of the people are imitators and only 5 percent initiators, people are persuaded more by the actions of others than by any proof we can offer.

What is easy to forget, though, is that everybody else observing the event is likely to be looking for social evidence, too. And because we all prefer to appear poised and unflustered among others, we are likely to search for that evidence placidly, with brief, camouflaged glances at those around us. Therefore everyone is likely to see everyone else looking unruffled and failing to act. As a result, and by the principle of social proof, the event will be roundly interpreted as a nonemergency.This, according to Latané and Darley, is the state of pluralistic ignorance

Not only was this help rapid and solicitous, it was infectious. After drivers entering the intersection from the other direction saw cars stopping for me, they stopped and began tending to the other victim. The principle of social proof was working for us now. The trick had been to get the ball rolling in the direction of aid. Once that was accomplished, I was able to relax and let the bystanders’ genuine concern..

No leader can hope to persuade, regularly and singlehandedly, all the members of the group. A forceful leader can reasonably expect, however, to persuade some sizable proportion of group members. Then the raw information that a substantial number of group members has been convinced can, by itself, convince the rest. Thus the most influential leaders are those who know how to arrange group conditions to allow the principle of social proof to work maximally in their favor. 

Using what he termed the “luncheon technique,” he found that his subjects became fonder of the people and things they experienced while they were eating.

However, his status at Cambridge was represented differently in each of the classes. To one class, he was presented as a student; to a second class, a demonstrator; to another, a lecturer; to yet another, a senior lecturer; to a fifth, a professor. After he left the room, each class was asked to estimate his height. It was found that with each increase in status, the same man grew in perceived height by an average of a half inch, so that as the “professor” he was seen as two and a half inches taller than as the “student.

The way to love anything is to realize that it might be lost.