Imagine a group of nearly 12,000 kids, just about to enter middle school, being watched closely by doctors and scientists over three years. These kids, aged 9 to 10 at the start, were part of a study looking at one big question: Does spending more time on social media lead to more depression? And if kids are already feeling down, does that make them use social media more? The researchers followed these kids through early adolescence, a time when emotions and friendships can feel like roller coasters.
The researchers asked the kids how much time they spent each day on social media, including apps where they could share photos, message friends, or watch videos. They also had parents report on the kids’ moods using a checklist that helps doctors figure out if someone is feeling sad or depressed. They checked in every year for four years.
What they found was pretty eye-opening. When a kid spent more time on social media than they usually did, that same kid was more likely to feel more depressed the next year. This happened again and again between years one and two, and between years two and three. But it didn’t work the other way around—feeling sad one year didn’t make a kid more likely to spend extra time on social media the next year. So the sadness didn’t seem to come first. The social media use did.
It’s important to know that this wasn’t about comparing one kid to another. Instead, the scientists looked at how each kid’s own behavior and mood changed over time. That way, they could be sure that it wasn’t just that sad kids happened to use social media more. They found that even kids who were usually doing fine would feel more down if they had a year when they used social media more than usual.
This doesn’t mean every kid who uses social media a lot will become depressed. But it does mean that there’s a pattern showing that more screen time, especially on social platforms, might be making some kids feel worse emotionally. One idea is that kids are more likely to compare themselves to others online, or they might see things that make them feel left out. Or maybe they don’t sleep as well or don’t get outside as much when they’re glued to their phones.
The scientists made sure their results weren’t just because of other things, like how much money a kid’s family had, how much school their parents finished, or if there was family stress at home. Even after considering all of that, the link between more social media and more depression still showed up.
One of the most interesting parts of the study was that it lined up with a model psychologists use to understand media effects. It says that things like personality, age, and life situations can change how social media affects a person. A kid who already struggles with friendships or confidence might be more likely to feel hurt by something they see online. Another kid might use social media to stay connected in a positive way. So it’s not the same for everyone—but the general trend is still a concern.
This study is also special because it followed kids over several years. Most past studies only looked at one point in time, which makes it hard to know what comes first—sadness or screen time. By following the same kids and measuring both things again and again, these researchers could see the changes happening in order.
The researchers say that doctors, teachers, and parents should pay close attention to how much time kids spend on social media, especially during these early years when kids are still figuring out who they are. They suggest that it might be helpful to talk to kids about how they’re using social media, what they’re seeing, and how it makes them feel. If a kid starts spending a lot more time online, it could be a sign to check in and see if they’re okay emotionally.
Even though this study can’t prove that social media is the only cause of sadness or depression, it gives a strong warning that it could play a role. It also hints that cutting back on screen time might help kids feel better emotionally. That’s something that parents and caregivers might want to think about when setting rules around phones and devices.
There are still a lot of questions left to answer. For example, what kinds of things on social media are most upsetting for kids? Are some apps worse than others? Do certain kids handle social media better than others? More research could help figure that out. But for now, this study gives one clear message: more social media time is tied to more sadness over time for many kids.
That doesn’t mean social media is all bad. In fact, some kids use it to stay in touch with friends or to find support when they’re feeling down. The key may be in how it’s used. If kids are taught to use it in positive, mindful ways—like connecting with real friends, avoiding things that make them feel bad, and taking breaks when needed—it might help reduce the harm.
This study gives adults one more reason to talk openly with kids about their screen time, and to help them build habits that support their mental health. Setting boundaries, keeping devices out of bedrooms at night, and encouraging face-to-face friendships are a few ways to help. And above all, noticing changes in mood or behavior and asking about them could make a big difference.
In short, the study shows that the more time preteens spend on social media, the more likely they are to feel depressed a year later. Watching for these changes and talking about them early can help kids grow up healthier and happier in a digital world.