Foot-in-the-Door
Foot-in-the-door is the finding that agreeing to a small request makes a person more likely to agree to a larger one later. Jonathan Freedman and Scott Fraser demonstrated it in 1966 with yard signs in Palo Alto. The effect is real and modest. A meta-analysis of fifteen years of research puts it at about r = .10, with roughly half of the studies null or reversed, which is a long way from the 76 per cent against 17 per cent that circulates.
What it is
The first request is the one that does the work. A person who has agreed to something trivial has, in agreeing, learned something about themselves, and the larger request that follows arrives at someone already recruited. Self-perception is the mechanism usually named for this: you watch your own compliance, infer a disposition from it, and behave consistently with that disposition afterwards. Nothing has been promised and nothing has been paid.
The study is Freedman and Fraser's "Compliance without pressure: The foot-in-the-door technique", in the Journal of Personality and Social Psychology in 1966. Experiment II ran in Palo Alto. Householders were asked to display a small three-inch "Be a safe driver" sign. Two weeks later a different experimenter called with a much larger request: permission to install a large, unattractive "Drive Carefully" billboard obscuring the front of the house.
The 76 per cent against 17 per cent figure that everyone quotes is one cell of a five-condition design. It is the condition in which both requests concerned the same issue and asked for the same kind of task, n = 25, set against the one-contact control at 16.7 per cent, n = 24. The three conditions that varied the issue or the task produced 47.4 to 47.8 per cent. Across all experimental conditions, compliance was just over 55 per cent. The total analysed sample was 112.
There is also an earlier Experiment I, on 156 participants, in which a phone survey about household soap was followed by a request to admit a survey crew to the house for two hours. That produced 52.8 per cent against 22.2 per cent. It is a different study from the sign one and the two are often merged in retellings.
What happened to the effect afterwards is the part worth carrying. Beaman and colleagues pooled roughly 120 experimental comparisons in 1983 and found an overall effect of about r = .10, with about half of the studies null or reversed. Fern, Monroe and Avila, working three years later in the marketing literature, put the average gain at 11 to 12.5 percentage points. Burger's 1999 review concluded that no single mechanism accounts for the results: whether the first request was actually performed matters, whether it was so small as to be meaningless matters, and so does whether the second request is large enough to provoke reactance, which reverses the whole thing. Self-perception explains part of it and not all of it.
Conflating this with escalation of commitment is the standard error, and our own vault made it. Until 1 September 2026 the yard-sign study was filed under escalation of commitment, which is Barry Staw's 1976 construct about increasing investment in a failing course of action. Foot-in-the-door concerns a small success making a larger request more likely. One is a compliance technique run by a second party who wants something from you; the other is a self-justification pattern in a person's own decisions, strongest when they chose the course themselves. The two get filed together because both can be summarised as "commitment makes you do more", and the more famous study then absorbs the citation.
This page is tagged mixed, which on this site means real support and real problems in the same literature. Both halves are on the page. Freedman and Fraser's figures have been checked against the full text. The 1983 and 1986 effect sizes reached us through search-level synthesis of paywalled articles rather than the papers themselves, and are flagged as such here rather than presented as read.