A lot of people don’t notice when it takes place. When you check your phone for one thing—maybe a message or a news story—forty minutes have gone by. There is no dramatic feeling. Don’t sound the alarm. There is only a slow, quiet drain, and you have a vague feeling that you don’t remember what you just watched.
It’s not nothing that you feel. Neuroscientists are saying more and more that it needs a lot more attention than it’s getting.
It’s been getting worse for years, but a study published in Frontiers in Psychology in 2026 made some of it clearer. The people who took the study had to do a standard working memory test, which checks how well the brain stores and uses information in real time. The results made one thing very clear: the people who watched the most short-form videos did the worst. Not just a little. All the time. Researchers were sure they could name the link between heavy scrolling and worse cognitive performance because it was so clear.
Working memory is an important skill. It’s more like the brain’s operating system, which is what lets you follow a conversation, keep an idea for long enough to act on it, and link one thought to the next. You first feel it in small ways when it starts to slip. You read sentences again. You can’t follow what someone told you. You forget why you’re in a room when you walk in.
The speed at which the system changes contexts makes infinite scrolling very hard on this one. As soon as you swipe, your mind goes to a different subject, like a cooking video, a political video, someone’s cat, or a natural disaster. The hippocampus, which stores memories, has to quickly process each piece and then throw it away to make room for the next one. Researchers think that this leads to cognitive fatigue over time—not the kind of fatigue that makes you feel focused, but the kind that makes you feel like you haven’t accomplished much.
It’s also chemically sound. Because they are built the same way, the brain’s reward pathways react to infinite feeds in the same way they react to gambling. The point is that it’s hard to predict. You’re not scrolling because the last video was good; you’re doing it so that the next one might be. Dopamine is released before the reward comes, not when it does. It’s more important than it sounds to make that distinction. That means the loop can keep going on its own, and you need more than willpower to stop it.
What is still really unknown is how long these effects will last. University Hospitals neurologist Dr. Boulos said that there isn’t strong evidence yet that heavy scrolling causes permanent memory loss. That’s an important caveat. But there isn’t always no risk when there isn’t any proof. Also, research is still catching up to habits that hundreds of millions of people have had for only a few years.
One result of the study from 2026 was interesting because it was a counterbalance: exercise. No matter how much video content the participants watched, those who worked out regularly did better on memory tests. Another small bit of good news is that the link between physical activity and cognitive resilience might be deeper than we think. I think that question is worth looking into.
An important part of this design is often missed when people talk about screen time. The feature called “infinite scroll,” in which content just keeps going, was chosen on purpose by engineers. There used to be pagination on websites. You reached the end of a page and had to make a quick choice: should you keep going or stop? Getting rid of that friction was done on purpose, and it worked just as planned. It got more interesting. The natural sign to stop was gone.
When you look at that history, it’s hard not to feel that the responsibility for people to be moderate is, at the very least, not being shared fairly. People are using teams of engineers and behavioral data to get around systems that were made to make the session last as long as possible. At the very least, it doesn’t make sense to blame users for what happened.
It’s still not clear where this will lead in terms of public health advice, platform regulation, or design standards. But it looks like science is moving in a more stable direction. There are ways to measure how the brain reacts to endless scrolling. Some of these ways are scary. And anyone who says otherwise should talk to their prefrontal cortex, that is, if they can put down their phone long enough.
