Commitment and consistency

After agreeing to a small request, people are somewhat more likely to agree to a larger related one.

Motivation and commitment Mainly on Checkout pages
Where it applies

Three of the eight page areas.

HomepageAlso applies CategoryNot typical SearchNot typical ProductAlso applies CartNot typical CheckoutMainly here Post-purchaseNot typical

Not usually a sitewide principle. See everything at work on Checkout pages

How to use it

Four ways to use it, and one to avoid.

  • Ask for a small, low-risk step before the bigger one.
  • Start with a quiz answer or a wishlist save.
  • Ask for an email address before payment details.
  • Treat it as a hypothesis to test, since the research used charity-style requests, not purchases.
  • Avoid: treating an early email address as permission to market, since PECR needs consent or the soft opt-in.
What the research found

A small, weak effect found with prosocial requests. No ecommerce evidence was found.

Nearly half of studies showed no effect or the reverse.

Meta-analyses find a small effect (r about .17) that needed prosocial requests. Beaman and colleagues (1983) called it replicable but weak, with nearly half of studies showing no effect or the reverse. A direct replication found no significant effect by 2013. No ecommerce field evidence was found.

Key research

Five sources, each checked.

Last reviewed

Freedman & Fraser (1966) Compliance without pressure: The foot-in-the-door technique J. Personality & Social Psychology Read the source Dillard, Hunter & Burgoon (1984)Meta-analysis Sequential-request persuasive strategies: Meta-analysis of foot-in-the-door and door-in-the-face Human Communication Research Read the source Burger (1999) The foot-in-the-door compliance procedure: A multiple-process analysis and review Personality & Social Psychology Review Read the source Gamian-Wilk & Dolinski (2020)Replication The Foot-in-the-Door Phenomenon 40 and 50 Years Later: A Direct Replication of the Original Freedman and Fraser Study in Poland and in Ukraine Psychological Reports Read the source Beaman, Cole, Preston, Klentz & Steblay (1983)Meta-analysis Fifteen Years of Foot-in-the-Door Research: A Meta-Analysis Personality & Social Psychology Bulletin Read the source
Before you use it · UK law

Collecting an email early does not by itself permit marketing: PECR needs consent, or the soft opt-in with a clear opt-out offered when the address is collected.

This is simply a pointer to check, not legal advice. Seek legal advice before you put this principle into action.