Have you ever tried to swap seats with a stranger on an airline? Ever negotiated the price of a car? Ever tried to convince someone to recycle, quit smoking, or make a similar change in health behaviors? If so, you are well versed with how persuasion can show up in everyday life.
Persuasion has been defined as “the process by which a message induces change in beliefs, attitudes, or behaviors” (Myers, 2011). Persuasion can take many forms. It may, for example, differ in whether it targets public compliance or private acceptance, is short-term or long-term, whether it involves slowly escalating commitments or sudden interventions and, most of all, in the benevolence of its intentions. When persuasion is well-meaning, we might call it education. When it is manipulative, it might be called mind control (Levine, 2003).
Whatever the content, however, there is a similarity to the form of the persuasion process itself. As the advertising commentator Sid Bernstein once observed, “Of course, you sell candidates for political office the same way you sell soap or sealing wax or whatever; because, when you get right down to it, that’s the only way anything is sold” (Levine, 2003).
Persuasion is one of the most studied of all social psychology phenomena. This module provides an introduction to several of its most important components.
To learn more about the research behind persuasion, watch this video:
Persuasion theorists distinguish between the central and peripheral routes to persuasion (Petty & Cacioppo, 1986). The central route employs direct, relevant, logical messages. This method rests on the assumption that the audience is motivated, will think carefully about what is presented, and will react on the basis of your arguments. The central route is intended to produce enduring agreement. For example, you might decide to vote for a particular political candidate after hearing her speak and finding her logic and proposed policies to be convincing.
The peripheral route, on the other hand, relies on superficial cues that have little to do with logic. The peripheral approach is the salesman’s way of thinking. It requires a target who isn’t thinking carefully about what you are saying. It requires low effort from the target and often exploits rule-of-thumb heuristics that trigger mindless reactions (see below). It may be intended to persuade you to do something you do not want to do and might later be sorry you did. Advertisements, for example, may show celebrities, cute animals, beautiful scenery, or provocative sexual images that have nothing to do with the product. The peripheral approach is also common in the darkest of persuasion programs, such as those of dictators and cult leaders. Returning to the example of voting, you can experience the peripheral route in action when you see a provocative, emotionally charged political advertisement that tugs at you to vote a particular way.
How do we convince others to be persuaded? There are several techniques that have been studied:
Testimonials and endorsements: someone who people already trust testifies about the product or message being sold
Present the message as education: the message may be framed as objective information
Word of mouth: persuasion professionals may pay others to take surveys and then they may try to disguise their message as word of mouth from your peers
Reciprocity: when someone does something for us or gives us something, we feel obligated to return the favor in kind
Social proof: We compare our behavior to what others are doing and, if there is a discrepancy between the other person and ourselves, we feel pressure to change (Cialdini, 2008)
Commitment and consistency: Once we have made an initial commitment, it is more likely that we will agree to subsequent commitments that follow from the first. Knowing this, a clever persuasion artist might induce someone to agree to a difficult-to-refuse small request and follow this with progressively larger requests that were his target from the beginning. The process is known as getting a foot in the door.
A door in the face (reject-then-compromise): the persuader begins with a large request they expect will be rejected. They want the door to be slammed in their face. Looking forlorn, they now follow this with a smaller request, which, unknown to the customer, was their target all along.
Sunk cost trap: a person’s aversion to loss impels them to throw good money after bad, because they don’t want to waste their earlier investment
Scarcity: People tend to perceive things as more attractive when their availability is limited, or when they stand to lose the opportunity to acquire them on favorable terms (Cialdini, 2008)
Effective persuasion requires trusting the source of the communication. Studies have identified three characteristics that lead to trust:
perceived authority
honesty
likability
When the source appears to have any or all of these characteristics, people not only are more willing to agree to their request but are willing to do so without carefully considering the facts. We assume we are on safe ground and are happy to shortcut the tedious process of informed decision making. As a result, we are more susceptible to messages and requests, no matter their particular content or how peripheral they may be.
From earliest childhood, we learn to rely on authority figures for sound decision making because their authority signifies status and power, as well as expertise. These two facets often work together. Authorities such as parents and teachers are not only our primary sources of wisdom while we grow up, but they control us and our access to the things we want. In addition, we have been taught to believe that respect for authority is a moral virtue. As adults, it is natural to transfer this respect to society’s designated authorities, such as judges, doctors, bosses, and religious leaders. We assume their positions give them special access to information and power. Usually we are correct, so that our willingness to defer to authorities becomes a convenient shortcut to sound decision making. Uncritical trust in authority may, however, lead to bad decisions. Perhaps the most famous study ever conducted in social psychology demonstrated that, when conditions were set up just so, two-thirds of a sample of psychologically normal men were willing to administer potentially lethal shocks to a stranger when an apparent authority in a laboratory coat ordered them to do so (Milgram, 1974; Burger, 2009).
Uncritical trust in authority can be problematic for several reasons. First, even if the source of the message is a legitimate, well-intentioned authority, they may not always be correct. Second, when respect for authority becomes mindless, expertise in one domain may be confused with expertise in general. To assume there is credibility when a successful actor promotes a cold remedy, or when a psychology professor offers his views about politics, can lead to problems. Third, the authority may not be legitimate. It is not difficult to fake a college degree or professional credential or to buy an official-looking badge or uniform.
Honesty is the moral dimension of trustworthiness. Persuasion professionals have long understood how critical it is to their efforts. Marketers, for example, dedicate exorbitant resources to developing and maintaining an image of honesty. A trusted brand or company name becomes a mental shortcut for consumers. It is estimated that some 50,000 new products come out each year. Forrester Research, a marketing research company, calculates that children have seen almost six million ads by the age of 16. An established brand name helps us cut through this volume of information. It signals we are in safe territory. “The real suggestion to convey,” advertising leader Theodore MacManus observed in 1910, “is that the man manufacturing the product is an honest man, and the product is an honest product, to be preferred above all others” (Fox, 1997).
If we know that celebrities aren’t really experts, and that they are being paid to say what they’re saying, why do their endorsements sell so many products? Ultimately, it is because we like them. More than any single quality, we trust people we like. Roger Ailes, a public relations adviser to Presidents Reagan and George H.W. Bush, observed: “If you could master one element of personal communication that is more powerful than anything . . . it is the quality of being likable. I call it the magic bullet, because if your audience likes you, they’ll forgive just about everything else you do wrong. If they don’t like you, you can hit every rule right on target and it doesn’t matter.”
The mix of qualities that make a person likable are complex and often do not generalize from one situation to another. One clear finding, however, is that physically attractive people tend to be liked more. In fact, we prefer them to a disturbing extent: Various studies have shown we perceive attractive people as smarter, kinder, stronger, more successful, more socially skilled, better poised, better adjusted, more exciting, more nurturing, and, most important, of higher moral character. All of this is based on no other information than their physical appearance (e.g., Dion, Berscheid, & Walster, 1972).
One approach to improving an individual’s ability to resist persuasion is to help the person create a strong attitude. Strong attitudes are more difficult to change than are weak attitudes, and we are more likely to act on our strong attitudes.
One method of increasing attitude strength involves forewarning: giving people a chance to develop a resistance to persuasion by reminding them that they might someday receive a persuasive message, and allowing them to practice how they will respond to influence attempts (Sagarin & Wood, 2007). Forewarning seems to be particularly effective when the message that is expected to follow attacks an attitude that we care a lot about. In these cases, the forewarning prepares us for action—we bring up our defenses to maintain our existing beliefs. When we don’t care much about the topic, on the other hand, we may simply change our belief before the appeal actually comes (Wood & Quinn, 2003). Forewarning can be effective in helping people respond to persuasive messages that they will receive later.
A similar approach is to help build up the cognitive component of the attitude by presenting a weak attack on the existing attitude with the goal of helping the person create counterarguments about a persuasion attempt that is expected to come in the future. This procedure—known as inoculation—involves building up defenses against persuasion by mildly attacking the attitude position (Compton & Pfau, 2005; McGuire, 1961).
What about subliminal messages in advertisements? Watch the following videos about research on subliminal messages:
Truth about subliminal messages
Deceptive origins of subliminal messaging
Resources used on this page:
"Persuasion: So Easily Fooled" by Robert Levine for NOBA: The Science of Social Psychology (CC-BY-NC-SA)
"Persuasion" by OpenStax and Lumen Learning In General Psychology (CC-BY)