Commitment & Consistency
Also known as Consistency principle, Foot-in-the-door technique
Once people make a small commitment, they are more likely to make larger commitments that are consistent with it.
See it in action
The same screen without and with Commitment & Consistency. Watch both sides play out, then compare the outcome.
Asking for everything before giving anything makes leaving the easiest choice.
After one easy, meaningful choice, signing up feels consistent with what they've started.
What to watch: a single tap creates momentum that carries into the bigger ask.
Start with a small, valuable commitment, then ask for more once people are invested.
Use foot-in-the-door tricks to escalate into commitments people would never accept upfront.
Key takeaways
- Start with small, easy commitments before asking for bigger ones.
- Let users state goals; they will act to stay consistent with them.
- Never use small commitments to trap users into unwanted obligations.
Quick facts
- Also known as
- Consistency principle, Foot-in-the-door technique
- Described by
- Jonathan Freedman & Scott Fraser
- Year
- 1966
- Category
- Decision-making
- Related laws
- Goal-Gradient Effect, Zeigarnik Effect, IKEA Effect
Commitment & Consistency explained
People like to see themselves as consistent. Once they take a position or action, they feel internal pressure to behave in line with it.
Small, voluntary and public commitments are the most powerful, because people feel they chose them freely.
Products can use this principle to help users stick with goals they care about, but should not escalate commitments in ways users would not agree to.
Where it comes from
Jonathan Freedman and Scott Fraser demonstrated the foot-in-the-door technique in 1966: homeowners who agreed to a small request were far more likely to agree to a larger one later. Robert Cialdini later described commitment and consistency as a key principle of influence.
How it shows up in apps
Onboarding flows that start with a simple question, goal setting, saving a first item or a free tier create commitment that makes later steps feel natural.
Commitment & Consistency examples
A language app asks new users to choose a daily goal of 5, 10 or 15 minutes before sign-up. Having committed to a goal, users are more likely to create an account and return the next day.
Goal setting
Fitness and learning apps ask users to set a goal early, which increases adherence as they try to stay consistent with it.
Progressive sign-up
Asking for an email first and more details later increases completion compared with asking for everything at once.
Wishlists and saved items
Encouraging users to save items creates a small commitment that increases later purchase likelihood.
How to apply Commitment & Consistency
- Begin with small, low-effort commitments.
- Ask users to state their goals and remind them later.
- Build commitments gradually as value grows.
- Make commitments voluntary and visible to the user.
- Allow users to change their mind easily.
Want Commitment & Consistency checked in your own product? Our onboarding & activation audit evaluates it alongside the other principles that shape how users decide, onboard and stay.
Common mistakes
- Using small commitments to trap users in hard-to-cancel subscriptions.
- Asking for big commitments too early.
- Shaming users for not following through.
How to measure it
Compare completion and retention rates when users make small early commitments, such as setting a goal, against flows without them. Monitor complaints and cancellations to ensure commitments are welcome.
Frequently asked questions
What is Commitment & Consistency?
Once people make a small commitment, they are more likely to make larger commitments that are consistent with it.
Where does Commitment & Consistency come from?
Jonathan Freedman and Scott Fraser demonstrated the foot-in-the-door technique in 1966: homeowners who agreed to a small request were far more likely to agree to a larger one later. Robert Cialdini later described commitment and consistency as a key principle of influence.
How does Commitment & Consistency apply to app design?
Onboarding flows that start with a simple question, goal setting, saving a first item or a free tier create commitment that makes later steps feel natural.
What is the foot-in-the-door technique?
It is a persuasion technique where agreeing to a small request makes people more likely to agree to a larger one later.
How do apps use commitment and consistency?
By asking users to set goals, save items or complete small steps that make later actions feel consistent with their earlier choices.
How do you measure Commitment & Consistency in a product?
Compare completion and retention rates when users make small early commitments, such as setting a goal, against flows without them. Monitor complaints and cancellations to ensure commitments are welcome.
Sources
- Freedman, J. L., & Fraser, S. C. (1966). Compliance without pressure: The foot-in-the-door technique. Journal of Personality and Social Psychology, 4(2). Find on Google Scholar ↗
- Cialdini, R. B. (1984). Influence: The Psychology of Persuasion. William Morrow. Find on Google Scholar ↗
Related laws
Motivation & emotionGoal-Gradient Effect
People speed up their effort as they get closer to a goal, so visible progress — even artificial head starts — increases completion.
Motivation & emotionZeigarnik Effect
People remember unfinished or interrupted tasks better than completed ones, and feel a pull to return and complete them.
Motivation & emotionIKEA Effect
People place disproportionately high value on things they helped create, even when the result isn't perfect.
Commitment & Consistency in practice
- Career guidesProduct design science in 2027: how designers, PMs and founders use the laws of UX and behavioural science to make product decisions employers trustProduct design science in 2027: how designers, PMs, founders and marketers use the laws of UX and behavioural science to make better product decisions.
- Career guidesUX psychology skills employers want in 2027: attention, memory, perception, decision-making and how designers apply them without manipulationUX psychology skills employers want in 2027: attention, memory, perception, decision-making, Hick's and Fitts's laws, cognitive load and ethics.
- Making moneyApp monetization strategies that don't annoy users — designed with behavioural scienceMonetize your app without wrecking retention: value-first paywalls, honest trials, rewarded ads, anchoring and decoy pricing done ethically, and what to avoid.
- Career guidesBusiness decision-making under uncertainty for 2027: framing decisions, reversible vs irreversible choices, expected value, scenarios and sensitivity, premortems, decision trees, deciding with 70% of the information and learning from outcomesBusiness decision-making under uncertainty in 2027: framing, reversible choices, expected value, scenarios, premortems, decision trees and learning.
- Career guidesStrategic decision-making skills employers want in 2027: framing choices, options and criteria, scenarios, reversibility, expected value, pre-mortems and group biasesStrategic decision-making skills for 2027: framing choices, options, criteria, scenarios, reversibility, expected value, pre-mortems and avoiding group bias.
- Career guidesCognitive bias at work in 2027: anchoring, availability, confirmation bias, overconfidence, sunk cost and groupthink, how they distort hiring, forecasts and decisions, and practical ways to reduce themCognitive bias at work in 2027: anchoring, availability, confirmation bias, overconfidence, sunk cost, groupthink and practical debiasing habits.
Certifications that test it
- Free certification · UX/UI, Design, Research & CreativeUX Research CertificationCertifies that you can plan, run and synthesize user research that changes decisions — method choice, recruiting, interviewing, usability testing, surveys and analysis.
- Free certification · UX/UI, Design, Research & CreativeDesign Systems CertificationCertifies that you can build, document, govern and scale a design system — tokens, components, documentation, adoption and design–engineering collaboration.
- Free certification · UX/UI, Design, Research & CreativeBehavioral Design CertificationCertifies that you can apply behavioral psychology and behavioral economics to product design ethically — motivation, decision architecture, habits and the laws of UX.
- Free certification · Product, Project Management & Business AnalysisDesign Leadership CertificationCertifies that you can lead design — build and grow teams, set design strategy, run design operations, measure design's impact and influence the business.
- Free certification · Product, Project Management & Business AnalysisAgile Product Owner CertificationCertifies that you can do the product owner job in agile teams — Scrum roles and events, backlog ordering and refinement, user stories and acceptance criteria, and value-focused releases.
- Free skill test · 10 minCognitive Bias TestA 10-minute test of cognitive biases: how anchoring, loss aversion, defaults, decoys and framing shape users' choices, and how confirmation bias, sunk costs and the planning fallacy distort team decisions.
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