Comparing yourself on social media: what constant measuring does to the brain

Ten minutes before sleep. You open your phone, “just quickly”. A classmate is posting photos from Bali. An acquaintance has just run a marathon. A third person has been promoted and is thanking “an incredible team”. A fourth has the kitchen you only ever save to a wish folder. You close the app and — although ten minutes ago there was nothing wrong with your life — a quiet, grey feeling stays with you: everyone lives better than I do.

That feeling isn’t your fault and isn’t an accident. It’s the predictable result of two things meeting: an ancient mechanism in our brains that hasn’t changed in millennia, and a technology that has turned that mechanism — not necessarily deliberately, but very effectively — against us. Comparing ourselves with others is built in; but the environment in which we compare is now, for the first time in history, made up almost entirely of highlights.

In this piece I’ll explain what psychology has known about social comparison for seventy years, what the research on social media and self-image shows — including one of the rare genuine experiments — and what you can do without having to throw your phone into the sea.

Comparison isn’t a bad habit — it’s a built-in compass

In 1954 the psychologist Leon Festinger published his theory of social comparison, still one of the foundational insights of social psychology: people have a basic need to evaluate their abilities and opinions — and where there is no objective measure, we evaluate ourselves by comparison with others. Am I a good runner? A good enough parent? Successful for my age? None of these questions has an answer in a vacuum; the answer always arises in comparison.

Festinger and the researchers after him described two main directions. Downward comparison — with people who are doing worse — generally settles us and lifts our mood (“it’s not as bad as it could be”). Upward comparison — with people who are doing better — is double-edged: it can inspire (“if she can do it, maybe I can too”), but more often, especially when we feel insecure and when the distance seems unbridgeable, it leaves a sense of inferiority, envy and discouragement.

Important: this mechanism isn’t a defect of character. It’s a fast, automatic tool by which social creatures work out their place in a group. In the environment it evolved for — a village, kin, a few dozen people you see whole, with their good days and bad — it worked reasonably fairly. The problem isn’t the compass. The problem is that we’ve carried it into an environment that systematically lies.

A machine that shows you nothing but highlights, twenty-four hours a day

Social media is to the mechanism of social comparison something like a sweet shop is to the mechanism of hunger: an environment that exploits a natural tendency on an industrial scale. Three reasons why comparison there is almost always upward comparison — and almost always unfair.

First, the content is curated. People post highlights: the holiday, not the Tuesday; the promotion, not the rejection; the tidy kitchen, not Sunday’s chaos. This isn’t hypocrisy, it’s human — but the result is a feed in which your entire life (backstage included) is measured against a selection of the best scenes from a hundred other lives. You’re comparing your unedited footage with their final cut.

Second, the sample is enormous and skewed. Festinger’s compass was calibrated for comparable others — neighbours, peers. But the algorithm serves you, alongside your neighbours, fitness coaches, entrepreneurs, influencers with professional photography teams. Among them there is always someone better than you in any given category — which is a statistical necessity, though the feeling makes it personal.

Third, there’s no end. In a village, comparison was bounded by the size of the village. An infinite feed is bounded by nothing; and a compass that never stops measuring turns from a tool into a millstone.

What researchers have actually measured

That this isn’t just cultural grumbling is shown by the data that have accumulated over the past decade and a half.

Vogel and colleagues (2014) showed in a series of studies that more frequent Facebook use is associated with lower self-esteem — and that much of the association is carried by exposure to upward comparison: in an experiment, even briefly looking at the profile of someone who seemed more successful and healthier lowered a participant’s momentary self-evaluation. Fardouly and colleagues (2015), in an experiment with young women, showed that even ten minutes of browsing Facebook worsens mood and — in those more prone to appearance comparison — increases dissatisfaction with their own body compared with a control website. Meta-analyses in the field consistently confirm the link between exposure to idealised images and body image.

The crucial distinction was introduced by Verduyn and colleagues (2015): it makes a difference how you use social media. Passive use — silently scrolling through other people’s posts without interacting — lowered well-being in both their experiment and their field study, and did so precisely through heightened envy. Active use — conversations, messages, your own posts, genuine exchange — showed no such link; in places it was even associated with a greater sense of connection. The bad news: by researchers’ estimates the great majority of time on social media is passive. That “I’ll just have a quick look” with which most evenings begin is exactly the form of use that does the most harm.

The experiment that showed it can be otherwise

Most research in this field is correlational, so the question of direction stays open: does social media worsen well-being, or do unhappier people spend more time on it? Which makes a study that tested this experimentally especially valuable.

Melissa Hunt and colleagues (2018) at the University of Pennsylvania randomly divided 143 students into two groups: one used social media (Facebook, Instagram, Snapchat) as usual, the other limited use for three weeks to ten minutes per app per day — about half an hour in total. Use was checked objectively, through the phone’s screen-time data. The result: after three weeks the limited group reported significantly less loneliness and fewer depressive symptoms — and those who entered the study most low gained the most.

Two things about this are particularly telling. First: it wasn’t about giving social media up, only about a limit. So the message isn’t “delete yourself”, but “less, and more deliberately”. And second, a detail with an ironic aftertaste: less loneliness with less “social” media. Quietly watching other people’s lives evidently doesn’t count as contact — it is often exactly the sensation of contact without its nourishment.

The envy that builds and the envy that eats

Upward comparison almost always wakes the emotion we find hardest to admit: envy. And because it’s considered ugly, most people suppress it, rename it (“it’s nothing, it just stings a bit”) or turn it into cynicism towards whoever is doing well. A pity — because envy is in fact an extremely precise piece of information.

Dutch researchers (van de Ven, Zeelenberg and Pieters, 2009) showed that there are two distinct forms. Benign envy — “I want to get where he’s got” — raises energy and motivation: participants who experienced it were willing to invest more effort in improving themselves. Malicious envy — “I wish he didn’t have it” — channels energy into devaluing the other person and leaves us bitter and passive. Which one fires depends mainly on whether the other person’s success seems attainable and deserved: the attainable inspires, the unattainable humiliates.

There’s a useful instruction hidden here. When someone’s post stings, instead of feeling ashamed, ask yourself: what exactly is this feeling showing me that I want? Envy is a compass of desires — it often says what we don’t dare say aloud: that we miss partnership, creativity, movement, a change of career. Take the information and leave the comparison. And the second half of the instruction: check who you’re comparing yourself with. An influencer with a professional team is no more your reference point than a two-metre giant is a reference point for your height. If you must compare, then with someone who was, some time ago, where you are today — that kind of comparison can turn into a map instead of a verdict.

Why we know all this — and go on scrolling anyway

Almost everyone I talk to about this knows the theory. “I know it’s all staged.” And still the feeling arrives. Why?

Because comparison isn’t a conclusion but a reflex. It happens in a fraction of a second, below the threshold of deliberation — reason can only comment once the emotional colouring is already here. Knowing that a photo is curated is about as effective as knowing that an optical illusion is an illusion: you understand it, and you still see it. On top of that, the apps are designed to exploit the brain’s reward mechanisms — unpredictable rewards, likes, an endless feed with no natural stopping point; I’ve written about how the dopamine system drives “a bit more, one more” in the piece on motivation and dopamine.

And a deeper layer still, one I often meet in working with people: comparison grips hardest where self-image is already wounded. A post about someone’s wedding hurts the single person, someone else’s children the couple who want them, someone’s promotion the person doubting their own path. The network doesn’t create the wound — but it finds it precisely every evening and presses on it. Which is why the question “why does this hit me so hard” is often more important than the question “how much time do I spend on my phone”. How self-image, self-esteem and self-confidence actually differ — and why self-esteem built on comparison is so fragile — I’ve explained in a separate piece.

What you can do — without fleeing to the woods

The aim isn’t digital asceticism; most of us need social media or simply enjoy it. The aim is use that you choose, not the app. Four things with the strongest support in research and practice:

• Audit who you follow. Go through the list of accounts you follow once and ask a single question about each: how do I feel after their posts? Inspired and curious — it stays. Small, envious, not enough — unfollow or mute, even if they’re people you know. Your feed is the only medium in the world you curate entirely yourself; use that.
• A time limit. Hunt’s study is a good approximation of the dose: around half an hour a day, with an app timer, not with willpower. And at least two safeguards for the most vulnerable moments: not in the first thirty minutes of the morning and not in bed at night — a tired, undefended mind is comparison’s easiest prey.
• From passive to active. Verduyn’s distinction in practice: before you open an app, ask yourself what you’re going in for. If the answer is “just to look” — that is the scrolling that most reliably lowers well-being. Write a comment, send a message, call the person whose post you’ve looked at three times. Contact nourishes; watching contact does not.
• Change the axis of comparison. The only comparison with a level measure is comparison with yourself: where I was a year ago, what I can do today that I couldn’t before. If other people’s posts regularly bring on a wave of “I should have by now, everyone else has”, you can borrow the technique of the deferred appointment for them — I’ve described how it works in the piece on postponing worry: thoughts get their own time on paper instead of running your evening.

And if you want to really see how much room comparison takes up in your head, try a one-week experiment: every time you catch yourself comparing — on a screen or off it — just put a tick in a notebook. No changing anything, only counting. Most people are honestly surprised by the end of the week; and observing alone usually softens the habit, because it turns an automatism into a choice. Only once you can see the reflex can you do anything with it.

When comparison is a symptom, not a habit

If after all this you notice that the sense of falling behind others speaks up without a phone too — at work, at a family lunch, at every encounter with someone else’s success — then social media probably isn’t the cause but the stage. Chronic comparison is often the voice of an older story: standards other people set for you, love that seemed conditional on achievement, a feeling that you have to be special in order to be allowed to exist. In working with people I notice that behind relentless comparison there is almost always the same quiet question: “Am I enough?” — and that no one else’s profile can answer it, because it was asked long before the first phone. Where that feeling comes from I’ve written about in the piece on the origins of low self-esteem — and this is exactly the material that can be worked with very concretely in therapy.

If you recognise yourself, I’d invite you to read about how I work on the page My Approach, or to write to me through contact. Until then, perhaps just this small experiment tonight: next time you put down your phone with that grey feeling, instead of “everyone lives better”, ask yourself: “What did I just compare myself with — and how much of it was real?” It won’t switch the reflex off. But it will, for the first time, take a step back from it — and in that step lies all the difference.