Ask people to picture a good commute and many of us imagine the same thing: quiet. No small talk, no eye contact, no stranger to deal with. But when researchers tested this, the commuters who did the opposite came out happier. Nicholas Epley, a behavioural scientist at the University of Chicago, found that “commuters on a train into downtown Chicago reported a significantly more positive commute when they connected with a stranger than when they sat in solitude.”
A note before going further: We are writers reading the psychology research, not clinicians or psychologists. The studies below are findings about groups of people, not advice tuned to any one reader. What holds true on average is not a prescription, and plenty of people feel neutral, or worn out, by exactly the interactions the research describes.
The assumption: connection has to be close to count
Many of us assume the connection worth having comes from the inner circle. Partner, family, the few close friends who know the whole story. Everyone else, the barista, the neighbour whose name you never caught, the person two seats down, is background noise. It is not an unreasonable belief. Social science itself suggested it.
The terms come from the sociologist Mark Granovetter, who in 1973 drew a line between strong ties, our close relationships, and weak ties, the acquaintances and near-strangers we brush against. Researchers still use that distinction between strong ties with close friends and family and weak ties, the people we see less often and know less well. For a long time nearly all the attention went to the strong ones. Weak ties were seen as useful for finding a job, not as something that might change how a person actually feels on a given day.
What the research actually found
That has changed. In studies published in 2014, Gillian Sandstrom and Elizabeth Dunn reported that “in Study 1, students experienced greater happiness and greater feelings of belonging on days when they interacted with more classmates than usual.” This was a pattern within one group of students, tracked across days rather than proven as cause and effect. Even so, it pointed somewhere unexpected: the more light, acquaintance-level contact people had, the better the day tended to feel.
A second experiment made the point sharper. Sandstrom and Dunn sent people into a coffee shop and randomly told some to have a brief, warm exchange with the barista and others to keep it purely transactional. The authors wrote that “in the current study, people who had a social interaction with a barista (i.e., smiled, made eye contact, and had a brief conversation) experienced more positive affect than people who were as efficient as possible.” They also reported “initial evidence that these effects were mediated by feelings of belonging”. The word to hold onto is initial. The belonging explanation is an early reading, not a settled fact.
Epley’s train studies point the same way. The researchers ran nine experiments, in the field and in the lab, in which commuters told to strike up a conversation reported a better ride than those told to keep to themselves. As Epley put it, “this misunderstanding is particularly unfortunate for a person’s well-being given that commuting is consistently reported to be one of the least pleasant experiences in the average person’s day.”
Why we get this so wrong
If these exchanges tend to feel good, why do so few people try them? Perhaps, people simply expect them to go worse than they do. They think the conversation will be awkward and the stranger uninterested.
However, in a week-long study Sandstrom ran with Erica Boothby and Gus Cooney, participants had 1,336 conversations, and 87 per cent were with the first person they approached. Most attempts simply worked. The feared cold brush-off was the exception.
Anyone who has planned a small remark to a seatmate and then said nothing has felt this gap. The forecast is pessimistic; the reality, in these studies, is mostly fine.
What a light exchange seems to do
The likely reason is modest: these moments top up a sense of belonging. Sandstrom puts it in plain terms. She has said that “these kinds of minimal interactions with people make us feel good — like we’re connected to people. It makes us feel more trust in the world and more of a sense of community.” That is one researcher’s read, likely true on average rather than for everyone.
She also draws a useful line between a weak tie and a true stranger. In her working definition, “how I distinguish a weak tie from a stranger is that there’s mutual recognition. You don’t have to know the other person’s name, but you have to have seen them and know who they are.” The barista you nod to each morning sits in that middle band, neither close friend nor complete unknown. That is the band the research keeps pointing to.
A reframe, not a prescription
None of this asks anyone to become relentlessly chatty, and the researchers are careful not to oversell it. Many are single studies, several run in the lab or on narrow groups, so how far they carry into everyday life remains an open question.
Epley’s own caution is worth keeping in view: this kind of contact may not bring the lasting benefits of close relationships. It is a supplement, not a substitute for the people who know your whole story.
What the work offers is a small correction to a common mistake. Sandstrom, whose 2026 book Once Upon a Stranger collects much of this material, puts the modest version plainly: “when you talk to a stranger, you usually walk away feeling a bit happier and more connected, which we know is so important for humans.”
If ordinary connection feels hard to reach right now, or loneliness sits heavier than a reframe can lift, a qualified counsellor or therapist is a good person to talk to.
