Ben Franklin effect
Doing someone a favor makes you like them more, not less.
What it means
The Ben Franklin effect is the tendency to like someone more after doing them a favor, named for Franklin's account of disarming a political rival by asking to borrow a scarce book. The standard explanation is cognitive dissonance: having helped a person we had little prior reason to help, the mind adjusts our feelings to fit the deed. The same logic runs in reverse on the harm side, where mistreating someone can lead to devaluing or derogating the victim to justify the act. The effect rests largely on a single small 1969 study and a handful of follow-ups, and there is little evidence it compounds over repeated favors; still, it suggests that small voluntary commitments — lending a book, granting a request — can warm a relationship at least as much as receiving a favor does.
The founding experiment
The evidence begins with Jecker and Landy's 1969 study. Students won cash in an arranged contest, then some were asked by the experimenter to return the money as a personal favor, since he had funded the prizes himself; others were asked by a secretary on the department's behalf; a third group kept it. Those who gave it back as a direct favor to the experimenter rated him most favorably afterward. The design isolates the act: in two conditions the money is gone either way, so what raised liking was doing the favor for him specifically, not gratitude or gain. It is a single, small study, elegant but thin, and much of the effect's later fame rests on this one demonstration.
Dissonance or an unspoken bid?
Dissonance is the standard account, but a cleaner test complicates it. Niiya's 2016 experiments, run with Japanese and American participants, found that liking rose when a confederate directly asked for help, yet not when people helped without being asked. If self-justification alone drove the effect, unprompted helping should warm feelings too. Niiya reads the gap differently: a favor request is a small overture, a signal that the asker wants a closer relationship, and it is that affiliative bid people respond to. On this view the favor is less an act the mind must reconcile than an invitation it accepts. The two mechanisms likely coexist, but the request-versus-no-request difference is the reason to doubt a pure dissonance story.
The harm side
The mechanism runs both ways. Schopler and Compere had participants act kindly toward one confederate and harshly toward another on a learning task; they later liked the one they had treated well and disparaged the one they had treated badly, though both behaved identically. Davis and Jones showed the same logic with pure harm: people led to deliver a hostile personal evaluation came to think less of the target, most of all when they felt committed to it and could not take it back. Free choice is the hinge. An act one can disown, because it was coerced, reversible, or ordered, creates little dissonance and little derogation. It is voluntary, owned cruelty that the mind rewrites by devaluing the person it was aimed at.
Using it, and its limits
To recruit the effect, the favor has to be small, plausible, and freely granted: a borrowed reference, a quick read of a draft, advice the other person is glad to give. The free-choice condition that governs the harm side governs this one, so a request that feels coerced or engineered builds no goodwill and can read as manipulation once it is seen through. Scale matters too. A large or repeated imposition tips from a warming bid into a burden, and the person may resolve the strain by resenting the asker rather than liking them. The honest reading for practitioners is modest: asking a small favor is at least as good for a relationship as doing one, and often better, but it is a nudge, not a lever.
Examples
Franklin won over a political rival by asking to borrow a rare book; the rival, having obliged, treated him warmly thereafter.
Ask a prickly colleague to review your draft and they warm to you — having given an hour to your work, the tidiest explanation left is that you were worth helping.
The neighbours who fed your cat for a week come back friendlier than the ones whose cat you fed; having invested in you, they conclude they must like you.
A salesperson who asks a wary prospect for a quick opinion on a prototype, instead of pitching, often finds the prospect warmer afterward; having weighed in, they feel some ownership of the outcome.
A teacher who asks a disengaged student to help hand out materials wins more warmth than one who simply grants the student a favor; the small task recasts them as an ally.
First described in Named for Benjamin Franklin's anecdote; tested by Jecker & Landy (1969).
Key references
- Niiya, Y. (2016). Does a favor request increase liking toward the requester? The Journal of Social Psychology, 156(2), 211-221. doi.org/10.1080/00224545.2015.1095706
- Schopler, J., & Compere, J. S. (1971). Effects of being kind or harsh to another on liking. Journal of Personality and Social Psychology, 20(2), 155-159. doi.org/10.1037/h0031689
- Jecker, J. D., & Landy, D. (1969). Liking a person as a function of doing him a favour. Human Relations, 22(4), 371-378. doi.org/10.1177/001872676902200407
- Davis, K. E., & Jones, E. E. (1960). Changes in interpersonal perception as a means of reducing cognitive dissonance. Journal of Abnormal and Social Psychology, 61(3), 402-410. doi.org/10.1037/h0044214