Why do people sometimes agree to requests they would otherwise refuse? The way a request is presented can influence the answer. A small favour, an improved offer, or evidence that others have agreed can all shape a decision.
Compliance techniques in psychology are strategies used to encourage someone to agree to a request. Seven examples are foot-in-the-door, door-in-the-face, low-ball, that’s-not-all, reciprocity, social proof, and scarcity.
You may encounter these techniques in advertising, fundraising, workplaces, and everyday conversations. Understanding them can help you recognise persuasive requests and make more deliberate choices.
What Is Compliance in Psychology?
Compliance means responding to a request by changing your behaviour. It does not necessarily mean changing your private beliefs. For example, you might agree to help with an event while still thinking the event is unnecessary. The APA Dictionary of Psychology identifies behavioural change as the primary goal of compliance techniques.
The seven approaches below are a useful selection, rather than a complete classification. The first four describe sequences of requests or offers. Reciprocity, social proof, and scarcity are broader influence principles that can support many different requests.
1. Foot-in-the-Door Technique: Start With a Small Request
The foot-in-the-door technique involves gaining agreement to a small request before making a larger, related request.
Example
A community organiser asks you to sign a petition supporting a local park. After you agree, they ask whether you would volunteer at a park clean-up.
How it works
One explanation is that people want their actions to remain consistent. Once someone has taken a small supportive step, a larger action may feel consistent with that earlier choice.
The defining feature is the move from one request to another, larger request. Agreeing to the first does not obligate someone to accept the second.
2. Door-in-the-Face Technique: Follow a Large Request With a Smaller One
The door-in-the-face technique begins with a large request that is likely to be refused. The requester then presents a smaller request—the one they wanted accepted.
Example
A fundraiser asks whether you can volunteer for an entire weekend. When you decline, they ask whether you can help for one hour.
How it works
The smaller request can seem more manageable compared with the first. The requester’s apparent concession may also encourage the other person to make a concession in return.
Unlike foot-in-the-door, this technique starts with rejection. Its sequence is large request, refusal, smaller request.
3. Low-Ball Technique: Change the Terms After Commitment
The low-ball technique involves securing an initial commitment on attractive terms, then revealing additional costs or less favourable conditions.
Example
You agree to buy a service at an advertised price. After you have chosen it and started the sign-up process, you discover a mandatory setup fee.
How it works
Having already committed, someone may feel inclined to continue despite the changed terms. APA teaching materials distinguish this from foot-in-the-door: low-ball changes the conditions of an existing decision, while foot-in-the-door introduces a separate request.
Not every unexpected cost is a deliberate low-ball tactic. Intent and circumstances matter. Withholding known costs to obtain agreement, however, undermines informed choice.
4. That’s-Not-All Technique: Improve the Offer Before an Answer
The that’s-not-all technique makes an initial offer more attractive before the recipient has a chance to respond. The requester may add a benefit or reduce the price.
Example
A stallholder says, “This notebook costs £10—and I’ll include a pen at no extra charge,” before you accept or decline.
How it works
The improvement gives the recipient a more favourable offer to consider and can make it feel like a concession.
The timing separates this technique from door-in-the-face. That’s-not-all improves the offer before a response; door-in-the-face follows a refusal.
5. Reciprocity: Encourage Agreement Through Giving
Reciprocity is the tendency to respond to a benefit or favour by giving something back. Receiving help can create a felt social obligation to reciprocate.
Example
A colleague helps you prepare for a presentation. Later, when they ask you to review a report, you feel especially inclined to agree.
A free sample can create a similar feeling in a shopping context, although a purchase may also reflect simply liking the product.
A gift does not create an obligation to buy, donate, or provide a favour. Ethical giving leaves the recipient free to decline.
6. Social Proof: Use Other People’s Behaviour as a Guide
Social proof occurs when people use others’ behaviour to guide their own choices, particularly when they are uncertain.
Example
An event organiser tells potential attendees that many local residents have already registered. This may encourage someone who is unsure whether to attend.
Reviews, testimonials, and participation figures can provide social cues. They can also provide useful evidence, so their influence is not automatically irrational.
The key question is whether the information is genuine and relevant. A popular choice may still be unsuitable for your needs.
7. Scarcity: Emphasise Limited Availability
Scarcity can increase an opportunity’s appeal when access is limited.
Example
A workshop has two places remaining. Someone who has been considering it may decide to book because waiting could mean missing out.
Scarcity can involve a limited quantity or a real deadline. It gives people information about availability, but it can also encourage hurried decisions.
An honest statement about capacity differs from an invented shortage or a countdown that continually resets. Availability should be accurate and verifiable.
How to Recognise Compliance Techniques
Before agreeing to a request, pause and ask:
- Has the request grown since I first said yes?
- Have the price or conditions changed?
- Am I responding to a favour, popularity claim, or deadline?
- Would I accept this request if it were presented on its own?
These questions help you assess the current decision on its merits. An earlier agreement does not remove your ability to reconsider.
Frequently Asked Questions
What is the difference between compliance and conformity?
Compliance involves responding to a request. Conformity involves adjusting behaviour or beliefs to align with a group, potentially without any direct request. Social proof can contribute to either process.
How do foot-in-the-door and door-in-the-face differ?
Foot-in-the-door starts with agreement to a small request, followed by a larger one. Door-in-the-face starts with refusal of a large request, followed by a smaller one.
Are compliance techniques always manipulative?
No. Honest requests, genuine benefits, and accurate information can support voluntary decisions. Deception, hidden conditions, and pressure can make their use manipulative.
Do compliance techniques always work?
No technique guarantees agreement. The request, relationship, circumstances, and recipient’s preferences all matter.
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