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Most arguments about phones and homework start at 9 pm, after the work has gone badly. A better time is a calm Sunday, with a few facts on the table and a short agreement everyone helps write. Here is what the research says, and a set of rules you can adapt.
What happens to focus when a phone is nearby during homework?
In one observation study, researchers watched 263 middle school, high school and university students study at home for 15 minutes. On average, students stayed on task for less than six minutes before switching, most often to social media and texting. Students who used more study strategies stayed on task longer.
Notifications matter even when nobody picks up the phone. In a lab experiment, phone notifications alone disrupted performance on an attention-heavy task, by about as much as actually using the phone. In a field study with 221 people, participants reported more inattention in the week their alerts were on and their phones were within reach than in the week alerts were off and phones were away.
Does a silent phone on the desk still matter?
A 2017 study ran experiments with nearly 800 smartphone users. In one, people took tests with their silenced phone face down on the desk, in a pocket or bag, or in another room. Those whose phones were in another room did best, and the researchers called the effect "brain drain". Be honest with your teenager about the evidence, though: a pre-registered replication in 2022 did not find the effect. The notification studies above test something different: alerts, not the mere presence of a phone. Moving the phone costs nothing, so it is still a sensible default. We explain the debate in why a phone on the desk hurts focus.
What happened when schools banned phones?
Researchers Louis-Philippe Beland and Richard Murphy surveyed schools in four English cities about their phone policies and matched them to exam results. Exam performance rose after schools banned phones, and the gains came mostly from the lowest-achieving students. A school is not a home, but the pattern fits the studies above: students who struggle most may gain most when the easy distraction is removed.
A family phone agreement you can try this week
Write it down, keep it short, and review it after two weeks.
Phone parking. During homework, phones go to a fixed spot outside the study room, such as a charging point in the hall.
Alerts off. Homework blocks start with notifications off, not just sound off.
Planned check-ins. The observation study's authors suggested short "technology breaks". Agree on one: for example, 3 minutes of phone time after every 30 to 40 minutes of work. Use a kitchen timer, not the phone.
One device, one job. If homework needs a screen, use a laptop with only the tabs the task needs, and close messaging apps.
Coaching group exceptions. If a coaching batch shares homework on a messaging app, check it once at the start, note the tasks on paper, and put the phone away.
Screens leave before bed. A review of 67 studies found screen time was linked to shorter or later sleep in 90% of them. Charge phones outside bedrooms overnight.
Adults follow it too. If parents scroll through dinner, the rule will not last.
How do you bring it up without a fight?
Start with the problem, not the punishment: "Homework is taking until 11. Want to try something for two weeks and see if it gets faster?" Let your child choose the parking spot, the break length and the review date. Choices like these are part of autonomy-supportive parenting, and a rule a teenager helped design is easier to keep.
When the screen is the study tool, help make it a focused one. A step-by-step solver such as the Fermi Problem Library, which explains the reasoning rather than printing an answer, is a different kind of screen from a group chat. The rule is about purpose, not about screens in general.
After two weeks, ask two questions: did homework finish earlier, and what was hardest about the rules? Adjust one thing and keep going.
