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There is a song you hated the first time you heard it. Then it played in a shop. Then in a taxi. Then a friend sang it. Now it is on your playlist, and you cannot say when that happened.
That is not a weakness in your taste. It is one of the most tested findings in psychology. It is called the mere exposure effect, and once you see it, you will notice it everywhere: in ads, in logos, in the faces you trust, and in the feed you scroll before bed.
This article explains what it is, the strange experiments that proved it, and the catch that almost never gets mentioned when people describe it.
What Is the Mere Exposure Effect?
The mere exposure effect is simple to say: the more often you see something, the more you tend to like it.
Nothing else has to happen. Nobody has to tell you it is good. You do not have to get a reward for it. The thing just has to show up again and again. The word “mere” is the whole point. Seeing it is enough.
The idea was named by a psychologist called Robert Zajonc. In 1968 he published a long paper called “Attitudinal Effects of Mere Exposure” in the Journal of Personality and Social Psychology. People had noticed for ages that familiar things feel safe. Zajonc was the first to test it hard, and the effect held up.
The Experiments That Proved It
Zajonc did not use anything people already had feelings about. That was the clever part. He used things nobody had ever seen.
He showed students Chinese-style characters, made-up words that looked foreign, and photos of strangers’ faces. Some of them appeared only once. Others came back again and again. Afterwards he asked the students to guess whether each word meant something good or bad, or to say how much they liked each face.
The pattern was the same across all of them. The items the students had seen more often were rated as nicer, kinder, and more likely to mean something good. They had no information about any of them. They only had repetition.
The newspaper box nobody could explain
Then Zajonc took it out of the lab. In 1969 he and a colleague ran a field experiment using student newspapers in Michigan. For several weeks, a small box appeared on the front page containing one strange word. Words like kadirga, saricik, nansoma, and iktitaf.
Some of those words ran once. Others ran up to twenty-five times. Readers who asked the editors what was going on were told only that the advertiser wished to stay anonymous.
When the run was over, the researchers sent out questionnaires asking students whether each word meant something good or something bad. The words that had appeared most often were judged to be more positive. Nobody knew what the words meant. Nobody had been told anything. They had simply seen them more.
It Works Even When You Don’t Remember Seeing It
This is where the effect gets strange.
In 1989 a psychologist named Robert Bornstein pulled together more than two hundred experiments on the mere exposure effect and looked at what made it stronger or weaker. One result stood out. The effect was actually larger when people could not consciously tell that they had seen the thing before. A flash too quick to register still moved their feelings.
A 1985 study made the point even more sharply. Researchers played unfamiliar melodies to patients with Korsakoff’s syndrome, a condition that badly damages memory. After a five-minute gap, the patients could not reliably remember which tunes they had heard. But when asked which melodies they preferred, they chose the ones they had already heard, at the same rate as healthy people did.
Liking, it turns out, lives in a different room than remembering. You can lose the memory and keep the fondness.
Where You Meet It Every Day
Once you know the mere exposure effect exists, you start spotting it in ordinary life.
- Ads. Brands do not repeat the same advert because they think you forgot it. They repeat it because repetition itself makes you warmer toward the product.
- Songs. Radio and streaming playlists put new songs on heavy rotation for a reason. A song that “grows on you” is often just a song you have heard enough times.
- Faces. A 1977 study found people preferred a mirror-image photo of themselves, the face they see every morning, while their friends preferred the normal photo, the face the friends actually see. Each side liked the version they had seen most.
- Your feed. The people, opinions, and products that show up most often in your scrolling are, quietly, becoming the ones you feel most at ease with. Not because they are right. Because they are there.
The same pull toward the familiar shows up in groups, too. It is one of the forces behind groupthink, where a room full of people slowly agrees with whatever it has heard the most.
The Catch Nobody Mentions
Most explanations of the mere exposure effect stop there, and leave you with the idea that seeing anything more makes you like it more. That is not what the research says. There are two catches, and they matter.
Catch one: it does not fix dislike. It deepens it.
In 1972 a team led by Philip Brickman asked people to rate a set of abstract paintings. Then they showed people some paintings again: a few they liked, a few they felt neutral about, and a few they disliked.
For the liked and neutral paintings, repetition did what Zajonc predicted. People liked them more. But for the paintings people already disliked, seeing them again made the ratings go down, not up.
Repetition does not make everything pleasant. It pushes you further in whatever direction you were already leaning. Keep looking at something you resent, and you will not warm to it. You will resent it more.
Catch two: it fades once you notice it
Bornstein’s review found something else. When the repeats become obvious, when people clearly recognise “I have seen this many times,” the effect weakens. Push it far enough and the warmth turns into boredom or irritation. The effect is strongest on things you have not decided about yet, working quietly in the background.
Put those two catches together and the picture changes. The mere exposure effect is not a trick that makes you love anything. It is a slow, steady force that works on whatever is undecided in you, and it moves in the direction you are already facing.
What This Means for You
Here is the practical part. You do not get to choose what you feel about a thing on first sight. But you almost always get to choose what you put in front of your eyes again and again. And the research says that second choice is quietly making the first one for you.
A few things worth doing this week, none of which cost anything:
- Count what you see most. Not what you value most. What you actually see most. For many of us that is a phone screen. If you want a number, our free calculator shows how much of your life is on your phone, and the result tends to be sobering.
- Notice what you are leaning toward. Repetition will not turn something you resent into something you love. If a person, a channel, or an argument makes you angrier every time it appears, more exposure is not going to soften it. Less might.
- Give good things a fair number of looks. A new habit, a new friend, a book that felt slow. Zajonc’s words needed a few weeks on the front page. Most good things need more than one look before they feel like yours.
- Put something in the box on purpose. The students never chose what was in that little front-page box. You can. A view from a window. A photo of people you love. A line you want to believe. Set it where you will see it every day, and let the effect do its slow work.
Long before anyone ran an experiment, an old letter in the New Testament, written by Paul, said that people are changed into the likeness of whatever they keep their eyes fixed on. Zajonc measured the mechanism. That letter named where to point it. If what you keep looking at is shaping what you love, then the most important decision you make is not how you feel, but what you let stay in front of you. One of our writers took that question seriously in a short piece on what to do when you cannot stop scrolling, and it is worth a read.
Go back to that song you hated. You did not decide to like it. It was just there, and then there again, and then it was part of you. Tomorrow something else will be in the box on your front page. This time you get to say what.
A good place to start:
The Beginner’s Guide to Feeling God’s Presence Every Day
A simple, powerful guide to help you experience God in ordinary moments, even when life feels chaotic.
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Discussion Question
Do you think the mere exposure effect is mostly a good thing or mostly a dangerous thing in a world of endless ads and feeds? Share your answer in the comments. We read every one.
Share This
- Turns out “it grew on me” is a real psychological effect, and it even works on things you can’t remember seeing. The catch at the end is the part nobody told me. https://bgodinspired.com/index.php/spiritual-devotional/what-is-the-mere-exposure-effect/
- In 1969 a psychologist put made-up words on the front page of a student newspaper for weeks. The ones that ran most often were later rated as “good.” Nobody knew what they meant. This explains a lot about my feed. https://bgodinspired.com/index.php/spiritual-devotional/what-is-the-mere-exposure-effect/
- The more you see something, the more you like it. Except when you already dislike it. Then it gets worse. Reading this changed how I think about what I scroll. https://bgodinspired.com/index.php/spiritual-devotional/what-is-the-mere-exposure-effect/
Questions and Answers
What is the mere exposure effect in simple terms?
The mere exposure effect is the tendency to like something more simply because you have seen or heard it more often. No reward or argument is needed. Repeated contact on its own makes a thing feel more familiar, safer, and more pleasant. The effect was named by psychologist Robert Zajonc in a 1968 paper and has been confirmed in hundreds of later experiments.
Who discovered the mere exposure effect?
Psychologist Robert Zajonc named and first tested the mere exposure effect in his 1968 paper “Attitudinal Effects of Mere Exposure,” published in the Journal of Personality and Social Psychology. He showed people unfamiliar items such as Chinese-style characters, made-up words, and photos of strangers, and found that the items shown more often were rated more positively, even though people knew nothing about them.
Does the mere exposure effect work if you don’t remember seeing something?
Yes. A 1989 review of more than two hundred experiments by Robert Bornstein found the mere exposure effect was actually stronger when people could not consciously recall seeing the item. A 1985 study with memory-impaired patients found they preferred melodies they had heard before even though they could not remember hearing them. Liking can survive even when memory does not.
Can the mere exposure effect make you like something you hate?
Usually not. A 1972 study by Philip Brickman and colleagues found that repeated exposure increased liking for paintings people already liked or felt neutral about, but lowered ratings for paintings people already disliked. Repetition tends to push feelings further in the direction they already lean, so seeing something you dislike more often can make you dislike it more.
Why do advertisers repeat the same ad so often?
Advertisers repeat ads because of the mere exposure effect: seeing a brand or product many times makes people feel warmer and more trusting toward it, even without any new information. Repetition alone builds familiarity, and familiarity tends to feel like safety. The effect does weaken if the repeats become too obvious or annoying, which is why ads are often varied slightly over time.
