ADHD: born or made?

Can the digital environment shape our attention? Here is what the studies actually say. —

TL;DR

Introduction

We open the phone to answer a message. One video leads to another, a notification arrives, and a few minutes later the task we left half done is still sitting there. It's easy to wonder whether these experiences are changing our attention, or even producing ADHD. Answering means separating a clinical diagnosis from attention problems that can have many causes, and understanding what studies on digital media actually measure.

ADHD starts in childhood, even when the diagnosis comes later

ADHD is a neurodevelopmental disorder. It concerns how the capacities for attention, activity regulation and impulse control develop and work. It doesn't mean being distracted now and then. For a diagnosis, symptoms must be persistent, show up in more than one setting and significantly impair daily life. Anxiety, depression, learning difficulties and sleep problems can produce similar symptoms, and a clinical assessment has to consider them. The NIMH and the CDC describe ADHD as a condition that begins in childhood. Signs can change with age and become more visible as demands at school, at work or in organizing daily life increase.

A diagnosis in adulthood doesn't necessarily mean the disorder started then. Some people struggled from childhood but compensated, had support, or were never recognized. In other cases, childhood memories are incomplete and the assessment needs extra care. A diagnosis doesn't come from a single test or a self-description on its own. Clinicians reconstruct history, symptoms, settings and functional impact.

Genetics carries a lot of weight. Heritability estimates from twin studies sit around 70–80%, but they describe differences in risk across populations. They are not the probability that a specific person inherits ADHD, and they don't decide anyone's fate. The World Federation of ADHD international consensus stresses that risk emerges from the interaction of many genetic and environmental factors. Risk factors under study include prenatal exposures, preterm birth and some health conditions. A risk factor is not a sufficient cause, and an exposure alone is not grounds for a diagnosis.

Similar symptoms, different causes

Trouble concentrating can show up without ADHD. Short or poor sleep, chronic stress, anxiety or depression, too many tasks at once, or constant interruptions can all make working memory and attention control harder. These experiences are real, but they don't prove that someone has developed ADHD.

Digital habits can be part of this picture. Switching often between chats, videos and work, for example, can make it harder to pick up the thread again. That doesn't mean the smartphone caused a neurodevelopmental disorder. Time spent online says little on its own. What matters is what you're doing, when, with how many interruptions, and what it pushes out.

Plasticity: the brain changes, but not automatically

The brain changes its connections and ways of working through learning and experience. Synaptic plasticity (the change in how effectively neurons connect) helps build skills and habits. Repeating an activity often makes some of its steps smoother, and sleep helps consolidate what we learned. None of this means every repeated behavior produces a permanent change that is the same for everyone.

Sustained attention and executive functions, such as planning and holding back an impulsive response, keep developing from childhood through adolescence. Experience, chances to practice, sleep and context can influence how these capacities get used. In adults they remain plastic. But plasticity doesn't show that a digital experience generates ADHD, or that an exercise can "rewire" the brain in a guaranteed direction.

Why platforms hold our attention

Many platforms combine continuous feeds, notifications, short videos and personalized recommendations. A stream of content can offer novelty with no natural pause. Likes, messages and new videos arrive at times that aren't always predictable. Variable rewards can encourage repeated checking, while visual and sound cues and interruptions make it easier to jump from one activity to the next.

These mechanisms are a plausible explanation for why some people keep going back to an app or find it hard to stop. They are not a diagnosis, and they don't explain every behavior. Dopamine isn't a universal pleasure switch either. It's involved in several processes, including learning and motivation, and naming it doesn't by itself show that a platform has "hooked" the brain.

Why these features exist is a separate question, and not a clinical one. The business model rewards time spent, so products get tuned to keep us there. I wrote about that side (the attention economy and what it does to the way we connect) in Loneliness and Capitalism.

What the studies show

Studies don't all measure the same thing. Some look at time spent, others at problematic use, others at symptoms reported by parents or by the kids themselves. An inattention score is not a clinical ADHD diagnosis.

In short: several studies find a link between digital media and attention symptoms. The effects are small, the link can run both ways, and none of these studies shows that screens cause ADHD.

Nivins et al. (2026): 8,324 children, small link with social media only

A longitudinal study by Nivins and colleagues followed 8,324 US children, about 10 years old at the start, every year for up to four years. The researchers compared self-reported estimates of social media, video game and TV/video use with parent-reported symptoms. They also accounted for a genetic risk score and socioeconomic status. Average social media use was associated with a small increase in inattention symptoms over time. The association didn't show up the same way for video games or TV/video.

Attrition by year four (43% of participants were still in the study) and the use of reported measures instead of objective logs limit the conclusions. The study finds an association in the sample. It doesn't show that social media caused ADHD.

Ra et al. (2018): teenagers, modest link, all self-reported

Ra and colleagues followed 15- and 16-year-olds in California for 24 months. At the start, none reported significant symptoms. Each digital activity used at high frequency was associated with a modest increase in the odds of later crossing a symptom threshold.

But students rated both their own use and their own symptoms, schools were recruited by convenience, and the measure was not a clinical diagnosis. Undetected subclinical symptoms, family factors or other differences may have contributed to the result.

Systematic review (2024): 25 studies, mostly small links, some in reverse

The 2024 longitudinal systematic review pooled 28 articles from 25 studies of children and adolescents. About three quarters of the studies found at least one association between media use and later ADHD symptoms, usually small. The review also found signs of the reverse: attention symptoms could come before more problematic use.

Results depended on the type of media and how it was measured, and some stopped being significant once other variables were considered. A sequence over time makes an association more informative. It doesn't rule out other explanations or prove causation.

Ding, Liu and Chao (2025): meta-analysis, moderate correlation, no direction

The meta-analysis by Ding, Liu and Chao gathered 15 studies and 35,223 participants. It found a moderate correlation between problematic social media use and ADHD symptoms (r = 0.361).

That's a finding about association, not direction. Problematic use can go along with more symptoms, and pre-existing symptoms can also drive impulsive or heavy use. Measures varied across studies, and observational data alone can't separate cause, consequence and shared factors.

Ebster et al. (2026): short videos, 42 studies, low certainty

The review by Ebster and colleagues covers 42 studies and 46,912 participants up to age 25. It reports associations between heavy, disorganized use of short videos and weaker indicators of attention, working memory and self-regulation.

But 88% of the studies were cross-sectional. Only two were longitudinal, measures were mostly self-reported, and none used objective device data. The authors rate the overall certainty as low and call for longitudinal and experimental studies. The review doesn't prove that short videos causally reduce attention, or that they cause ADHD.

Taken together, the evidence fits with small or limited effects and with relationships that run in both directions. More use doesn't always mean worse attention, either. Content, context, sleep, individual needs and what the activity replaces all matter.

Children, teenagers and missed opportunities

During development, time also counts for what it makes possible: free play, reading, moving, sleeping, being with other people. If notifications or late-night sessions cut into sleep, concentration can suffer the next day. If a device opens up chances to learn, create or connect, the effect can be different. Screens, content and uses are not all equal.

The practical question is when and how, as well as how many hours. A video watched with an adult is different from an endless feed watched alone. A call with a friend is different from checking notifications while doing homework. For children and teenagers, digital habits make sense only in the context of the whole day, not as a uniform exposure.

Can we train our attention back?

Cutting interruptions, muting non-essential notifications, keeping the phone out of reach during a task, protecting sleep and adding movement to the day are reasonable ways to remove obstacles to concentration. Setting aside time to read or work without jumping between activities can also help you practice staying with one task.

The evidence on general "attention training" doesn't support promising the same improvement for everyone. And these habits don't treat ADHD. If persistent difficulties get in the way of study, work or relationships, the next step is a professional assessment.

The most cautious claim is this: we are not necessarily creating a generation of people with ADHD. We may, however, be building environments where attention gets interrupted often and holding the thread takes more effort.

It’s not only about how much time we spend in front of screens, but about the kind of attention we train every day.

What we know and what we don't know yet

Solid evidence. ADHD is a neurodevelopmental disorder with a strong genetic component, onset in childhood, and clinical criteria that include persistence, more than one setting and functional impairment. Sleep, anxiety, depression and other factors can produce similar attention problems and need to be considered.

Observed correlations. In several studies, problematic or frequent digital media use goes along with more attention symptoms. Some longitudinal studies find that exposure comes before small changes in scores, but there are also signs of the reverse. Associations are not a diagnosis, and they are not causation.

Hypotheses still to test. That specific platform features (infinite scroll, notifications, short videos) cause lasting changes in young people's attention or brains. Answering this needs studies with objective measures, longer follow-up, more representative samples and methods that can tell causes from consequences.

Essential bibliography