King · Journal of behavioral addictions 2024 · non-randomized controlled cohort study · n=1282

"Phones off while school's on": Evaluating problematic phone use and the social, wellbeing, and academic effects of banning phones in schools.

Level 3 - non-randomized controlled study

Non-randomized controlled follow-up study

PubMed 39441661 · doi:10.1556/2006.2024.00058 · record verified 2026-08-26

What was done

Preregistered repeated-measures non-randomized controlled study evaluating the short-term effects of a phased mobile phone ban among Grade 7 to 12 students across five South Australian public secondary schools. A 2 (phone ban: yes vs. no) × 2 (time: baseline vs. 1-month follow-up) design was used with surveys drawn from LSAC and PISA to assess problematic phone use, academic engagement, school belonging, bullying, and ban compliance (n = 1,282 at baseline; n = 1,256 at follow-up).

What was found

Problematic phone use was reported by 2.6% of the sample. Older age and higher social media use predicted lower compliance. Linear mixed models indicated that ban and no-ban schools did not differ significantly on problematic phone use, academic engagement, or school belonging. Bullying was slightly higher in the ban group, but bullying decreased significantly across both groups (abstract reports no effect sizes or p-values).

Why it matters

Despite policy widespread assumptions that phone bans enhance learning and social connection, this study shows no measurable short-term academic, wellbeing, or social benefits from restricting school phone access.

Limits

Follow-up was limited to only one month, schools were non-randomly allocated, outcomes relied on self-report surveys from five schools in one Australian state, and the abstract omits exact point estimates, confidence intervals, and test statistics.