Techniques of Compliance in Psychology

According to Breckler, Olson, and Wiggins (2006, p. 307) “Compliance refers to a change in behavior that is requested by another person or group; the individual acted in some way because others asked him or her to do so (but it was possible to refuse or decline.)”

“Situations calling for compliance take many forms. These include a friend’s plea for help, sheepishly prefaced by the question “Can you do me a favor?” They also include pop-up ads on the Internet designed to lure you into a commercial site and the salesperson’s pitch for business prefaced by the dangerous words “Have I got a deal for you!” Sometimes the request is upfront and direct; what you see is what you get. At other times, it is part of subtle and more elaborate manipulation.”

(Kassin, Fein, & Markus, 2011, p. 271)

Cialdini’s Principles of Persuasion

Robert Cialdini spent years training alongside professional compliance practitioners: salespeople, fundraisers, and recruiters. He wanted to see which psychological levers reliably work.

As his research found, six factors make people more likely to say yes to almost any request: reciprocity, liking, social validation, authority, consistency, and scarcity (Cialdini & Goldstein, 2004).

Reciprocity

Having received something, people feel obliged to give something back. This is the norm of reciprocity (Cialdini & Trost, 1998).

A free sample, a pen enclosed with a donation envelope, or an unsolicited “free estimate” can each create a mild sense of obligation. This happens even when nothing was actually asked for.

The effect is about the gift itself, not the promise of one. Enclosing a small, unconditional incentive with a mailed questionnaire raises the response rate by close to 20 percentage points.

The unconditional gift made the difference, not any promise.

Promising the same payment, but only if the questionnaire is completed, produces no comparable boost (Tourangeau, 2004). It is the unearned gift, not the future reward, that creates the obligation.

Liking and Authority

People find it harder to refuse a request from someone they like, and liking itself can be engineered. Physical attractiveness, expressed similarity, flattery, and demonstrated cooperation all raise compliance.

This cluster of tactics is sometimes called ingratiation.

A salesperson who spends the first minute of a pitch finding common ground with a customer is deliberately building liking.

Same hometown, same hobby. It works.

People also comply more readily with a request from someone who appears to hold relevant authority. A white coat, a job title, or simply an air of confidence can each raise compliance, independently of the request’s actual merit.

Confidence alone can work.

This is the principle that links compliance most directly to obedience. A salesperson perceived as an expert commands some of the deference a formal authority figure does, even though refusing them carries no penalty.

Social Validation and Scarcity

Numbers reassure people.

Requesters can raise compliance by showing that other people like the target have already complied: “join the thousands who have already signed.” Uncertainty about the right course of action makes other people’s behaviour informative.

The tactic can backfire, though. Health campaigns that stress how common an undesirable behaviour is, such as “binge drinking among students is alarmingly high”, risk normalising exactly the behaviour they are trying to reduce.

This reversal is called the boomerang effect, a real risk for health campaigns (Cialdini, 2004).

It backfires easily.

A related lever is scarcity: people assign more value to resources that are rare or dwindling.

“While stocks last” and “once-in-a-lifetime opportunity” both trade on this tendency. It extends beyond material goods to information and even relationships (Cialdini, 2004).

Consistency

Once people take a position, stating a belief, making a small commitment, signing a petition, they feel pressure to behave consistently with it.

This applies to themselves and to others alike.

This is the principle behind minority influence and, most directly, the foot-in-the-door tactic below.

These six levers work on a single request. The three tactics below are different: each is a two-step procedure, engineered so the first request changes how the second is judged.

Foot in the Door Technique

The foot-in-the-door technique is a compliance tactic that assumes agreeing to a small request increases the likelihood of agreeing to a second, larger request.

So, initially, you make a small request, and once the person agrees to this, they find it more difficult to refuse a bigger one (Freedman & Fraser, 1966).

Aim: Freedman and Fraser (1966) tested whether agreeing to a small request makes people more likely to agree to a much larger one later.

The setting was real homes, not a lab.

Method: In two field experiments, researchers approached homeowners in Palo Alto, California. One group was asked outright to display a large “DRIVE CAREFULLY” sign on their front lawn.

Compliance was low.

A second group first agreed to display a small “Be a Safe Driver” sign. Two weeks later, they were asked to accept the large sign too.

Then came the real test.

Results: Only around 17% of homeowners approached cold agreed to the large sign. Among those who had already agreed to the small sign, 76% agreed, more than four times as many.

That is a striking jump.

Conclusion: Freedman and Fraser argued that agreeing to the small request changes how people see themselves.

Having acted in a small, prosocial way, people infer they are “the sort of person who helps with things like this.” They grant the larger request to stay consistent with that self-image. Consistency, not persuasion, does the work.

For example, imagine one of your friends missed the last psychology class and asked to borrow your notes. This is a small request that seems reasonable, so you lend the notes to your friend.

A week later, the same friend asks to borrow all of your psychology notes. This is a large request – would you agree or not?

The foot-in-the-door phenomenon works on the principle of consistency. People prefer not to contradict themselves in both actions and beliefs.

It is simple. Once you agree to a request, refusing a similar one later feels inconsistent, so the technique works best when the second request matches the first (Petrova et al., 2007). One classic study makes the point directly.

Sherman (1980) called residents in Indiana (USA) and asked them if, hypothetically, they would volunteer to spend 3 hours collecting for the American Cancer Society.

Three days later, a second experimenter called the same people and actually requested help for this organization. Of those responding to the earlier request, 31% agreed to help. This is much higher than the 4% of a similar group of people who volunteered to help when approached directly.

Door-in-the-Face Technique

The door-in-the-face technique is a compliance method whereby the persuader attempts to convince the respondent to comply by making a large request that the respondent will most likely turn down.

This technique achieves compliance because refusing a large request increases the likelihood of agreeing to a second, smaller one.

First, you make a big request that a person can be expected to refuse. Then you make a smaller request.

The smaller request is hard to turn down. Most people don’t like refusing twice in a row.

For example, when negotiating a pay rise with your boss, you might first ask for 20%, a figure you expect to be refused.

A smaller, more realistic ask, say 10%, follows.

Aim: Cialdini, Vincent, Lewis, Catalan, Wheeler, and Darby (1975) tested whether refusing an extreme request increases compliance with a smaller, related request from the same source.

The setting was a university campus.

Method: Students were asked, in a control condition, to volunteer two hours escorting young offenders to the zoo.

In the experimental condition, students were first asked to counsel young offenders two hours a week for two years.

Almost everyone refused that.

Results: Only about 17% agreed to the zoo trip when it was the only request made. When it followed the refused two-year commitment, compliance rose to 50%.

That is roughly three times higher.

Conclusion: Cialdini et al. concluded that refusing the first, extreme request obliges the target to reciprocate the requester’s apparent concession.

Guilt plays a part too.

The effect required that the same person make both requests, in a similar domain. It collapsed when the two requests came from different people or unrelated causes.

The mechanism is specific.

This technique works due to the principle of reciprocity (Cialdini et al., 1975). Saying “no” to a large request can make a person feel they owe the requester a favor.

Low-Ball Technique

The low-balling technique is a compliance method in which the persuader gets a person to commit to a low-ball offer they have no intention of keeping; then, the price is suddenly increased.

Since a person has already committed, it is hard to say no to the new higher price demand.

For example, when buying a car, the salesman agrees on a price but must “check” with his manager if this is acceptable. While you wait, you think you have secured a good deal.

The salesman returns and says the manager would not agree. The price is raised, and most people agree anyway.

Cialdini (1978) asked students whether they would participate in a psychology experiment that started at 7 am and
most participants refused (control group).

In an experimental condition, Cialdini asked participants whether they would participate in a psychology experiment, and even though they weren’t told a time, most participants agreed.

Later they were told that it started at 7 am and given the chance to drop out if they wanted. On the day of the
experiment 95% turned up.

The success of this technique works on the principle of commitment. Because the person has said “yes” or agreed to an initial request, commitment has been given.

When the request changes or becomes unreasonable, the person will (to a degree) find it difficult to say “no” because of having originally committed themselves.

Critical Evaluation

The classic compliance tactics hold up well under scrutiny. But the evidence also shows they are not automatic, and they can backfire.

Unlike many social-psychological effects that rely on a lab setting, foot-in-the-door, door-in-the-face, and low-ball were all first demonstrated with real strangers making real decisions.

Homeowners decided whether to deface their own lawns (Freedman & Fraser, 1966), and passers-by agreed to unpaid weekend labour (Cialdini et al., 1975). This gives the account strong ecological validity.

The tactics are not automatic, though. Door-in-the-face collapses if the two requests come from different people or concern unrelated causes.

Low-balling collapses if the commitment step is skipped. Social validation, a related principle, can also backfire (Cialdini, 2004).

Contemporary Research

Two recent studies test how well these classic findings hold up.

Aim: Genschow, Westfal, Crusius, Bartosch, Feikes, Pallasch, and Wozniak (2021) tested whether the door-in-the-face effect, first demonstrated in 1975, still holds up nearly half a century later.

The stakes were high.

Method: The researchers ran a preregistered direct replication of Cialdini et al.’s (1975) original procedure with 391 passers-by in Germany, nearly five times the original sample.

Participants were randomly assigned to a target-request-only condition or the door-in-the-face sequence.

Results: Compliance with the zoo-trip request was 34% in the target-only condition and 51% in the door-in-the-face condition.

The gap was real.

That boost is almost exactly the size Cialdini’s team reported 45 years earlier.

Conclusion: The authors concluded that door-in-the-face is a robust, durable effect, not a fragile artefact of 1970s culture.

Their results support reciprocity, not simple contrast, as the mechanism.

A parallel synthesis exists for low-ball. Burger and Caputo (2015) pooled 19 published low-ball studies in a meta-analysis.

Compliance rates were consistently higher under low-ball conditions, around 54%, than in matched controls presented with the full request upfront, around 33%.

This closely mirrors Cialdini’s original 1970s gap. The effect was strongest when the initial commitment was made publicly and the revealed cost increase was modest.

Learning Check

Which of the following is the best example of the foot-in-the-door persuasion technique?