The romantic comedy has taught you the following model of how people end up together. Two people meet. There is, possibly, a spark — some moment of recognition, a conversation that goes deeper than expected, a feeling that this one is different. They find each other, against the odds, across the scale of a whole city. Love, the story suggests, is a matter of finding the right person — a needle-in-a-haystack problem with an extraordinary payoff at the end.
The research on how people actually form romantic relationships tells a different and deeply unromantic story. The single best predictor of whom you will end up with, in most of the data we have, is not compatibility, not chemistry, not shared values, not personality fit. It’s proximity. Where you live. Where you work. Whom you sit next to. Who happens to take the same train, attend the same class, live on the same floor of the same building. The data suggests that the haystack is, in most cases, much smaller than the romantic story admits — and that the needle was, most of the time, already standing very close to you.
The dormitory study that made it famous
The foundational research here comes from an MIT social psychologist named Leon Festinger, working in the 1950s. Festinger and his colleagues Stanley Schachter and Kurt Back had access to what was, at the time, a rare natural experiment: a newly-built housing complex called Westgate, populated by MIT students and their families who had been assigned their specific apartments essentially at random. Because the assignment was random, any pattern of friendship that emerged couldn’t be explained by people choosing to live near others they already liked.
Festinger surveyed the residents to ask whom they considered their friends. What he found has become one of the most influential results in the social science of relationships. The single best predictor of whether any two residents had become friends was the physical distance between their apartments. Neighbours two doors apart were dramatically more likely to be friends than neighbours four doors apart. Residents on the same floor were far more likely to be friends than residents on different floors. Residents whose apartments happened to sit near the building’s staircase — producing more passing encounters — became friends with people from other floors whom architecturally-isolated residents never met.
The effect was so large, and so independent of personality or shared interests, that Festinger called it functional distance — the idea that relationships form along the paths where ordinary life brings you into contact with other people. You don’t become friends with everyone you pass; proximity is necessary but not sufficient. But among the people you pass often, you become friends with some. Among the people you never pass, friendship is almost impossible, no matter how compatible you theoretically might be.
The Westgate findings have been replicated in many other settings since — office buildings, university classrooms, neighbourhoods, even online communities — and the basic pattern consistently holds. Relationships, friendships and, yes, romances form along the paths of ordinary life. The architecture of your daily movements is, quietly, also the architecture of who your people will be.
The mere-exposure effect
A parallel line of research, by a Polish-American psychologist named Robert Zajonc at the University of Michigan, established that this effect runs deeper than convenience. Zajonc wanted to test whether repeated exposure to something, even in the absence of any other interaction, produced an increase in liking. His experiments became famous.
In one design, participants were shown photographs of strangers for brief moments, some faces many times, some only a few times. Later, participants were asked how much they liked each face. The faces they had seen more often were rated as more likeable — even though participants had no memory of having seen them more often, no reason to prefer them, and no interaction beyond the fleeting exposure in the lab. Zajonc called this the mere-exposure effect: familiarity, on its own, breeds liking.
The effect has been replicated across many domains — faces, words, symbols, abstract shapes, songs, even foreign-language phrases. Simply seeing something repeatedly, even subliminally, appears to increase positive feelings toward it. The effect is strongest for things that are mildly ambiguous or neutral; it doesn’t reliably turn genuinely disliked stimuli into liked ones, and for stimuli that are strongly negative, repeated exposure can actually increase dislike.
Applied to relationships, the mere-exposure effect helps explain why proximity produces attraction rather than just convenience. It’s not just that you meet people who are near you; it’s that your brain, over weeks and months of repeated small exposures, begins to regard them as familiar and therefore mildly preferred. The person you see every morning at the coffee machine, the classmate you pass on the way to lectures, the colleague whose desk is near yours — each of these is being subtly elevated, in your subconscious ranking, above equally compatible strangers you’ve never seen.
What this means for the romantic story
The implications are genuinely deflationary, and worth sitting with.
The person you end up in a relationship with is likely to be, in large part, someone you met because of where you happened to be. If you’d gone to a different university, you’d probably be with someone else from that university. If you’d moved cities at twenty-three instead of staying, you’d probably be with someone from the new city. If you’d taken a different first job, most of the pool of possible partners you met at parties in your early twenties would have been different. The specific match between you and your actual partner, romantic as it may feel, owes a great deal to the fact that the two of you happened to be in the same room more than once.
The research on online dating has extended this in interesting ways. Studies of swipe patterns find, unsurprisingly, that people say they prefer partners who match their demographic and personality profiles closely. But the matches that actually convert into relationships are more strongly predicted by who was physically near the user at the time — who lived in the same neighbourhood, who could meet up within the same weekend — than by who scored highest on compatibility algorithms. Algorithms have made the pool larger; they have not changed the fundamental pattern that proximity, over months, beats compatibility, on paper.
Long-distance relationships are possible, and some succeed — but the statistical picture is that they are disadvantaged, not only because of the practical difficulties but because the ordinary mechanisms of relationship maintenance depend on daily contact. Proximity isn’t a nice-to-have. It’s one of the engines that sustains the liking in the first place.
The counter-thread worth hearing
Before drawing too strong a conclusion, it’s worth noting that the mere-exposure effect has limits, and the proximity research doesn’t say that all relationships are interchangeable.
Mere exposure can, in some circumstances, produce the opposite effect. If someone is already disliked — if their initial behaviour has set a negative frame — repeated exposure can reinforce that dislike rather than soften it. This is part of why neighbours who dislike each other often grow to dislike each other more over time. The mechanism is blind to direction. It amplifies whatever the initial reaction was, for better or worse.
Also worth noting: proximity explains who you meet, not why some of those meetings become meaningful and others don’t. Within any pool of proximate people, you still select — for values, for humour, for intellectual fit, for temperament. The research doesn’t say proximity produces love, only that it’s the raw material out of which love gets made. Two people who would have been profoundly incompatible don’t become compatible just because they pass each other in the corridor every morning. They just stay strangers, or become mild acquaintances.
What the research does rule out is the stronger romantic claim — that love finds you across great distances by some mystical pattern of recognition. That claim is almost entirely unsupported. People fall in love with people who are there. They almost never fall in love with people who aren’t.
What this should change about how you think
A few practical implications worth holding.
If you’re looking for relationships — romantic, friendship, professional — the single most effective thing you can do is put yourself in more places where repeated exposure with interesting people is possible. Not speed dating. Not single events. Recurring situations that bring you back, week after week, into contact with the same group of people. Classes. Clubs. Regular venues. Volunteer organisations. Sports teams. Online communities with real ongoing conversation rather than one-off interactions.
One-time events are usually poor relationship generators, regardless of how well designed. What builds relationships is the repeat encounter — the second and third and twelfth conversation with the same person, as mere exposure does its slow quiet work. This is why the best source of adult friendships, for most people, is not a single “meet new people” event but an ongoing activity where the same faces recur.
If you’ve been disappointed about your current social circle, consider the geography and routine of your life rather than your own deficiencies. You are meeting, roughly, the people who your daily paths make available to you. If those paths don’t include interesting people, the solution is to adjust the paths — not to try harder at meeting people along the paths you already have. This is a structural observation rather than a motivational one.
And if you’ve already found someone — a partner, a close friend, a community you love — it may be worth holding lightly the narrative that this was destined. The truth is closer to we happened to be proximate long enough for mere exposure to do its work, and then what we each brought to the relationship was strong enough for something to grow. This isn’t a diminishment. It’s a more honest picture. And the implication — that new people, in new proximity, could also grow into what these people have become — is a useful thing to remember whenever you move, or start over, or find yourself starting from scratch.
The question that remains
The lesson from this research, strangely, is neither romantic nor unromantic. It’s a reminder that many of the most important parts of your life — who you love, whom you count as friends, what communities you end up in — are shaped by quiet variables you didn’t choose and probably aren’t thinking about. Where you live. Where you work. Where you spend ordinary, repetitive, unglamorous hours. These choices, which feel logistical rather than meaningful, are in fact some of the most consequential choices you make. The big story of your life is being written, in part, in the small unconscious decisions about which corridors your daily life runs through.
The question worth carrying:
If the geography of your life determines most of who you’ll know and love, is the geography you’re in actually the geography you want the rest of your story to be written from?
Key research referenced: Leon Festinger, Stanley Schachter and Kurt Back’s Westgate studies (Social Pressures in Informal Groups, 1950); Robert Zajonc’s mere-exposure research (Journal of Personality and Social Psychology, 1968, and subsequent work); contemporary research on online dating patterns, including studies by Eli Finkel and colleagues.