School Phone Bans and Teen Mental Health: Iceland Study of 24,000 Responses Finds No Measurable Boost

Few policies have travelled as fast in recent years as the school phone ban. Parents love it. Politicians love it. Bestselling books have made it sound like the cure for an entire generation’s anxiety. Now a large study from Iceland, published in JAMA Network Open on 27 October 2026, delivers an unglamorous plot twist: when schools banned phones, teenagers’ mental health did not measurably improve.

Before you throw your own phone across the room in protest (or, more likely, scroll on), it helps to look closely at what the researchers did, what they found and what they could not measure. Because the honest headline is not “phone bans don’t work.” It is closer to “phone bans alone are not the magic switch you were promised.”

What the Iceland study looked at

The team, led by first author Elena Bonilla Aparicio and senior author Thorhildur Halldorsdottir with researchers from Reykjavik University and Karolinska Institutet among others, used national youth surveys from February 2016, February 2018 and November 2023. In total they analysed 23,938 responses from students aged roughly 13 to 15 at 70 schools. Between 2018 and 2023, 22 of those schools introduced schoolwide phone bans; the others did not.

That set-up allowed a so-called difference-in-differences analysis. In plain terms, the researchers compared how things changed over time at schools that banned phones with how things changed at schools that did not. If bans really lifted mood, the ban schools should have pulled ahead.

The main outcomes were depressive symptoms, anxiety, hostility and overall mental well-being. Secondary outcomes included perceived support from peers, time spent on social media, gaming and videos, plus bullying both in person and online.

What the researchers found

None of the main outcomes showed a statistically significant improvement in ban schools after the policies were introduced. The same was true for the secondary outcomes: no meaningful drop in bullying or cyberbullying, no clear change in peer support and no significant reduction in daily social media, gaming or video time. Analyses split by gender and checks with different timing or stricter rules pointed the same way.

If anything, the estimate for depressive symptoms leaned slightly in the wrong direction, but it did not pass the study’s strict threshold for significance, so it should not be read as evidence that bans make things worse. The authors’ own conclusion is careful: bans implemented on their own “may be insufficient” to improve adolescent mental health at the population level.

Why this does not end the debate

This is where the fine print matters. The authors are upfront about it. The surveys were repeated snapshots of different students, not the same teenagers followed over time. Ban schools were more often in the capital region. The 2023 survey switched from paper to digital. For some outcomes, such as girls’ depressive symptoms, ban and non-ban schools were already moving differently before the bans arrived. Most ban schools also had only around two years of follow-up. Everything was self-reported.

Just as important is what the study did not measure at all. Classroom attention, academic performance and teacher workload were outside its scope. Those are the reasons many schools give for bans in the first place. So a school that has seen calmer lessons since phones went into a locker is not contradicted by this research. It simply was not tested here.

A pattern, not a one-off

The Iceland result fits with earlier evidence. In 2025, the SMART Schools study published in The Lancet Regional Health Europe compared 1,227 students aged 12 to 15 at 30 English secondary schools. Restrictive policies cut phone use during school hours by around 40 minutes, yet the researchers found no difference in mental well-being, sleep or academic results. They did find that students who used phones and social media more overall tended to report worse mental health and poorer sleep.

Read together, the message is fairly consistent: the problem may be real, but the school gate may not be where most of the scrolling happens. A ban changes the hours a teenager spends at school. It does not change the bedroom at 1 a.m., the group chat on the bus or the algorithm waiting at home.

The politics of the phone-free classroom

None of this has slowed the policy wave. Jonathan Haidt’s bestseller The Anxious Generation, which argues for phone-free schools as one of several new norms for childhood, helped turn the issue into a global cause. Iceland itself has moved ahead: in August 2026, Minister of Education and Children Inga Sæland signed a national regulation that keeps personal phones out of primary school pupils’ hands during the school day, according to Iceland Review.

There is something very human about this. Schools are one of the few places where adults can actually set the rules, so that is where the rules land. It recalls the era when Zack Morris carried a brick-sized phone in Saved by the Bell and the only moral panic was who would pay the bill. The device changed. The instinct to regulate whatever teenagers love most did not.

What this means for you

If you are a parent, the study is not a reason to oppose your school’s phone policy. A calmer classroom can be worth having on its own terms. It is, however, a reason to be sceptical of anyone selling a single rule as the answer to teenage depression or anxiety. Mental health in adolescence has many drivers, from sleep and family life to social pressure, school stress and access to support. The phone is part of that picture, not the whole frame.

The more useful question for the next round of research is not whether to ban, but what works alongside a ban: digital habits at home, how platforms are designed, sleep routines and support services. Until those pieces are studied together, the phone locker will remain what it is now: a sensible house rule with a reputation that has run ahead of the evidence.

This article is for general information only and does not replace advice from a doctor or other qualified health professional. If you are worried about a young person’s mental health, please speak to a GP, a school counsellor or another professional.