Psychology says doing someone a small favor can actually make you like them more, thanks to the 'Ben Franklin Effect'

Have you ever helped a coworker proofread an email, lent a neighbor a book, or picked up coffee for a friend, only to realize you felt a little closer to them afterward? It seems counterintuitive. Most of us assume we do favors for people because we already like them. But psychology suggests the relationship can also work in reverse.

Researchers have long studied a phenomenon known as the Ben Franklin Effect, which proposes that doing someone a small, voluntary favor can actually increase your affection for that person. The idea may sound surprising, but decades of psychological research suggest there's more to it than simple kindness.

What is the Ben Franklin Effect?

The Ben Franklin Effect gets its name from a story involving American founding father Benjamin Franklin. According to Franklin's autobiography, he once asked a political rival to lend him a rare book. After the favor was granted and the book returned with a thank-you note, the rival reportedly became noticeably friendlier toward him.

Franklin later reflected:

"He that has once done you a kindness will be more ready to do you another than he whom you yourself have obliged."

Although the story itself is anecdotal, psychologists have since tested the principle in controlled experiments, and found evidence that the underlying idea can hold true.

The classic experiment that put the theory to the test

The strongest evidence comes from a landmark 1969 study by psychologists Jon Jecker and David Landy.

Participants took part in what they believed was a competition where they could win money. Afterward, some participants were personally asked by the experimenter to return the prize money as a favor because research funds were supposedly running low. Others were asked by a university administrator instead, while a third group was not asked to return anything.

When participants were later asked to rate how much they liked the experimenter, an unexpected pattern emerged. Those who had personally done the experimenter a favor rated him significantly more positively than participants in the other groups.

The researchers concluded that performing a voluntary favor had actually increased people's liking for the person they helped.

Why your brain changes the way you feel

The Ben Franklin Effect is commonly explained through cognitive dissonance, a theory introduced by psychologist Leon Festinger in 1957.

Cognitive dissonance refers to the mental discomfort people experience when their actions and beliefs seem inconsistent. If you go out of your way to help someone you don't feel particularly close to, your brain is faced with a contradiction.

Instead of thinking, "I helped someone I don't really like," your mind often resolves the inconsistency by subtly adjusting your attitude:

"If I willingly helped this person, I must actually like them."

In other words, your behavior begins to influence your emotions rather than the other way around.

Psychologist Daryl Bem's Self-Perception Theory, proposed in 1972, offers a similar explanation. Bem argued that people often infer their own attitudes by observing their behavior, especially when their feelings are initially weak or uncertain. If you notice yourself consistently helping someone, you may naturally conclude that you value that relationship.

The effect works best with small, voluntary favors

Psychologists emphasize that the Ben Franklin Effect is not a magic trick or a universal rule. Context matters. Research suggests the effect is strongest when:

• the favor is relatively small,
  
• it is freely chosen rather than pressured,
  
• the helper does not expect a reward, and
  
• the request feels reasonable rather than exploitative.
  

If someone feels manipulated, taken advantage of, or repeatedly burdened with requests, the positive effect can quickly disappear. Instead of increasing affection, unwanted obligations often lead to resentment.

This is why experts describe the Ben Franklin Effect as a subtle psychological tendency rather than a guaranteed outcome.

What the research really tells us

The Ben Franklin Effect reminds us that human relationships are shaped not only by what we think but also by what we do.

The research challenges the common assumption that kindness simply reflects affection. Sometimes, affection grows because of kindness.

The next time someone asks you for a small favor, or you find yourself helping a new acquaintance without much thought, you may be witnessing one of psychology's most fascinating quirks: by choosing to help, your brain may quietly decide that the person was worth helping all along.