Do School Phone Bans Really Improve Teen Wellbeing? New Study Suggests It’s Not That Simple

Redacción HC
12/02/2025

In an era where screen time and social media are central to teenage life, schools around the world are experimenting with policies that restrict phone use during the school day. The hope? That fewer digital distractions will translate into better mental health, improved academic performance, and more meaningful offline engagement.

But a large new observational study published in The Lancet Regional Health – Europe challenges this assumption. The SMART Schools study, led by researchers from the University of Birmingham, evaluated whether stricter school phone policies actually deliver better outcomes for adolescent wellbeing and digital habits. The results? More complex than expected.

Do Phone Bans Work? Not Exactly

With concerns about the impact of smartphones on teenage sleep, attention, and anxiety levels growing, many school systems have moved to restrict phone use. Some prohibit devices entirely during the school day, while others only ban them during classes. But until now, few studies had rigorously compared these different policy environments.

The SMART Schools study set out to fill this evidence gap, posing the critical question:

Do school phone restrictions reduce harmful phone and social media use, and improve student wellbeing?

The research provides an in-depth look into how policy shapes behavior—and where it falls short.

Inside the Study: What 1,200 Teens Revealed

Research Design

The cross-sectional study involved 1,227 adolescents aged 12 to 15 across 30 secondary schools in England. Among them, 20 schools implemented restrictive policies (e.g., no recreational phone use on campus), while 10 schools had permissive policies.

Students self-reported their daily phone and social media use. Researchers also used the Warwick–Edinburgh Mental Well‑Being Scale (WEMWBS) to assess overall mental health. To analyze the data, the team applied mixed-effects linear regression, controlling for factors like age, gender, and school demographics.

Key Limitation

Importantly, the study design was observational and cross-sectional, meaning it captures a snapshot in time but cannot determine causality. It also relied on self-reported data and did not include long-term follow-up.

What the Findings Actually Showed

Mental Wellbeing: No Significant Differences

Despite reducing phone use during school hours, restrictive policies had no measurable impact on overall wellbeing. The average WEMWBS score remained around 47 (±9), with no statistically significant difference between students in schools with restrictive or permissive phone rules (p = 0.62).

"Policy alone didn’t lead to better mental health outcomes," the authors noted, challenging assumptions behind current school strategies.

Usage Patterns: Less in School, Not in Life

Students in restrictive schools used their phones about 40 minutes less per day during school hours, and spent 32 fewer minutes on social media. However, total daily screen time—before and after school—remained the same between both groups.

This suggests that while restrictions work during class, they don’t reduce overall dependence on screens.

High Screen Time Still Harmful

Consistent with prior research, higher daily phone and social media use was associated with:

• Poorer sleep
• Lower physical activity
• Declines in academic focus and performance
• Decreased mental wellbeing

Yet these associations persisted regardless of school policy, implying that external factors—family environment, digital habits at home—may play a bigger role.

Practical Implications: Time for a Broader Approach

For Educators and Policymakers

The evidence shows that school restrictions can control behavior in school, but they are insufficient on their own to influence broader wellbeing.

Experts now recommend that schools:

1. Pair restrictions with digital literacy education, focusing on responsible online behavior.
2. Involve families and communities in developing healthy phone habits outside school.
3. Design longitudinal studies to assess longer-term effects of screen use on development.

"Restricting phones from 9 to 3 isn’t enough," says co-author Victoria A. Goodyear. "We need to address how and why teens use their phones the rest of the day."

For Public Health Strategies

Rather than isolated bans, researchers argue for comprehensive interventions:

• Mental health education
• Active break strategies during and after school
• Screen-time limits and app monitors at home
• Counseling and peer-support programs

This community-wide, ecosystem-based model may offer a more sustainable route to improving adolescent wellbeing.

Conclusion: Don’t Ban, Balance

The SMART Schools study delivers an important reality check: limiting screen time in schools doesn’t automatically boost mental health. Instead, the findings suggest that true impact comes from integrated, multifactor strategies that extend beyond classroom walls.

As more schools weigh phone policies, this research urges them to think holistically. Supporting teen wellbeing means engaging not just students—but also families, educators, and digital platforms—in building a healthier relationship with technology.

Topics of interest

Health Technology