Large Classroom Trial Adds Fresh Evidence to Debate Over Student Phone Bans

A major classroom experiment has added new evidence to the worldwide debate over whether students should be required to keep their smartphones away during lessons. Published in the journal Science on October 8, 2026, the study found that restricting phone use during lectures was associated with improved academic performance, particularly among students who had previously achieved lower grades.

What Did the Classroom Phone Ban Trial Find?

The randomised controlled trial involved 16,683 students across 10 higher-education institutions in Odisha, India. Researchers from the University of Pennsylvania, Jawaharlal Nehru University and the University of Copenhagen examined the effects of collecting students' phones at the beginning of lectures over a semester.

Students in the restriction group deposited their phones in classroom boxes during lectures, while students in the comparison group continued their usual phone-use practices. The researchers then assessed academic results and other outcomes, including student attitudes, classroom behaviour and wellbeing.

The study reported a modest improvement in grade point averages for students in phone-free classes. The gains were concentrated among students with below-median prior academic performance and first-year undergraduates. Improvements were minimal among higher-performing students, postgraduate students and students in science, technology, engineering and mathematics (STEM) programmes.

Why Lower-Performing Students May Benefit More

Smartphones can interrupt learning through notifications, messaging, social media and other activities unrelated to a lecture. Even when students do not actively use their devices, the possibility of checking a phone can compete with attention to teaching and classroom discussion.

By removing phones during lessons, institutions may create an environment with fewer opportunities for digital distraction. The researchers also found that attendance did not change significantly, suggesting that the academic improvement was not simply the result of more students attending lectures.

The findings raise an important question for educators: could phone restrictions help narrow academic performance gaps? Because the strongest gains appeared among students who had previously performed below the median, the results suggest that a focused classroom environment may be especially helpful for learners who face greater academic challenges.

Students Became More Supportive of Restrictions

Phone bans are often criticised for limiting students' independence or making it harder to communicate during the day. However, students surveyed after experiencing the classroom restriction became more supportive of the policy and less likely to prefer unrestricted phone use.

The study found no substantial changes in self-reported wellbeing, motivation or students' perceptions of how much they were learning. Researchers did identify a small increase in fear of missing out, particularly among male students, highlighting the need to consider student experiences when introducing restrictions.

Classroom observations also indicated fewer disruptions and less off-topic conversation in phone-free settings. These findings suggest that phone restrictions may influence classroom behaviour as well as academic outcomes.

International Research Shows Mixed Results

The latest experiment does not settle the global debate. A separate nationwide study of school phone restrictions in the United States, published in May 2026, found that lockable phone pouches substantially reduced phone use. However, average effects on standardised test scores were close to zero during the first three years after adoption. The study also identified short-term increases in disciplinary incidents and declines in student wellbeing, with these effects easing over time.

The difference between the findings highlights the importance of context. The Odisha experiment examined phone-free lectures at higher-education institutions, while the US research investigated restrictions during the school day in middle and high schools. Results from one setting should not automatically be applied to another.

What the Findings Mean for Schools and Universities

Education leaders considering phone restrictions should weigh the potential learning benefits against practical concerns, including emergency communication, accessibility requirements and students' individual circumstances. Clear rules, reasonable exceptions and consistent implementation may be important to making any policy workable.

The researchers' findings provide evidence that removing phones during lectures can improve academic performance in some settings, but they do not prove that every school or university will see the same results. Further research involving younger students, different education systems and alternative restriction policies is needed.

For now, the study strengthens the case for evaluating classroom phone policies through evidence rather than assumptions. The central takeaway is that restrictions may offer meaningful benefits for some learners, particularly those who need additional academic support, but their effectiveness depends on the educational context and how the policy is implemented.