The smartphone is there. Screen turned down, silent mode, innocent look from object turned off. But it takes up space. On the table, in the pocket, next to the computer, inside that area of the brain that continues to remember its presence even when no one is touching it. The scene is tiny, domestic, almost ridiculous. A message might arrive, a notification might not, an email might vibrate in two minutes. Meanwhile the book remains open, the document flashes, the sentence breaks.
For years we have been telling ourselves that attention span has been shortened, worn out, almost ruined by being used to screens. The feeling is familiar: you open one page, then another, then check a chat, then go back without really remembering what you were doing. The most interesting part of the recent research, however, is less catastrophic and much more uncomfortable. The human brain still seems capable of concentrating. What has changed is the way in which he is continually drawn elsewhere. Screens would not turn off our attention like a light bulb turns off; they would put her in a room full of switches, all within her fingertips.
The focus breaks first
The most cited data comes from the work of those who have observed people on computers for years, in real environments, not in an ideal room without notifications and without colleagues writing. In the early 2000s, the average time spent on a single activity before moving on to something else was estimated at around 2 and a half minutes. In more recent readings, that window has dropped to approx 40-47 seconds. A measure of daily behavior, rather than the biological power of attention. Simply put: we stay on a task less long because we skip more often, not because the brain has forever lost the ability to stay.
The multitaskingthen, continues to present himself well and behave badly. It seems like efficiency, but instead it resembles a move made by carrying one box at a time from one room to another. Each change of activity requires the brain to recover context, goal, rules, working memory. A study on interruptions during office tasks showed that people can also complete work in less time after being interrupted, but they pay the price in stress, frustration, time pressure and perceived effort. Apparent productivity holds, the body cashes in.
Here the matter becomes very concrete. Opening WhatsApp “just for a second”, checking an email “on the fly”, looking at a notification “to take your mind off it” doesn’t leave your brain as clean as before. There remain residues, pieces of previous activities that continue to make noise beneath the surface. It’s the mental version of a desk full of post-it notes: none of them really weigh, all together they block you from seeing the table.
The fault does not lie entirely in the will
Part of the public discourse on attention often drifts towards the sermon: we are weak, lazy, incapable of discipline. Comfortable. Also quite useless. Research on smartphones suggests something more troublesome: Even the mere presence of the phone can consume cognitive resources. In two experiments, the presence of a personal smartphone was associated with a reduction in available cognitive capacity, even when participants were able to ignore it. The cost was highest among people who were most dependent on the device.
This changes the way you read the problem. There attention span it does not live in a vacuum. She lives within an environment built to compete with her. Apps, platforms, messages, short videos, endless feeds and notifications don’t just ask for a few seconds. They ask for possibilities. They ask to always remain candidates for the next look. Even when we overcome temptation, part of the work has already been done: we had to resist.
Studies on media multitasking go in the same direction. Those who declare intense and simultaneous use of multiple media tend to show more difficulty in filtering out irrelevant stimuli and interference, even if the relationship between cause and effect remains delicate to establish. Some people may already be more inclined to jump from one stimulus to another; others could train, day after day, to do so. Prudence is needed here. The practical result, however, remains recognizable: the more doors we leave open, the more time the brain spends monitoring them.
The kids can still concentrate
The discussion about children and adolescents is what immediately turns on the siren. At school, many teachers see students who are more distracted, more impatient, quicker to declare any task that requires effort boring. In the United States, a 2024 survey cited in an analysis on the topic indicated that the 72% of high school teachers consider cell phone distraction to be an important problem in the classroom. Yet the available literature paints a less simple picture of the nostalgia of “it was better when there were notebooks”.
A meta-analysis published in 2024 examined data collected between 1990 and 2021 with the d2 Test of Attention, a paper-and-pencil test used to measure concentration, speed and accuracy. The sample included 287 independent samplesbeyond 21 thousand participants And 32 countries. In children there was no worsening of the effectiveness of the test; even moderate improvements in concentration performance appeared in adults. Speed and errors increased in children, a detail that resembles an impulsive response style rather than a pure loss of attention.
The more honest formula, at this point, sounds less dramatic and more useful: many kids can still pay attention, but they give up sooner. Digital has made immediate rewards always available. A video, a chat, a notification, a micro-dose of news. Schoolwork takes time and promises a distant benefit; the phone promises something right away. The difference is significant. And it weighs even more when the phone is there, physically present, even just inside the backpack.
Boredom has changed
Boredom is not just an annoyance. It’s a signal. It tells us that the current activity is worth less than something else we could be doing. The problem comes when that “something else” is always ready, bright, personalized, designed to never seem the same as itself. A book page can become interesting on a train without a field. The same page, with the phone next to it, has to compete with YouTube, chat, social media, games, news, voice messages and that Pavlovian reflex of checking “just one thing”.
An experiment cited in the boredom debate shows the mechanism well: people left for 15 minutes in a room with interesting objects that they could not use reported more boredom than those who were in a bare room. The available alternative, even prohibited, changed the perceived value of the present activity. Applied to daily life, the transition is almost brutal: we become more bored also because we know very well what we could do instead of being there.
From here we understand why cell phone bans at school, silenced notifications, app blocks and protected work times are not just punitive or nostalgic measures. They serve to change the context. If the brain learns that the phone doesn’t fit in a certain place, the boredom calculation can slowly readjust.
The good news, sober enough not to sound like a motivational slogan, is that attention can be protected. Breaks, sleep, movement, working during the moments of the day when you are most lucid, notifications turned off, phone out of sight, tasks broken into realistic blocks: all things that are not very sparkling, and therefore probably useful. Even the mindfulnesspracticed consistently, is indicated by some research as a possible training to bring the mind back to the task after a distraction.
But we need to stop talking about it attention span as a private moral virtue. A single person can do a lot, of course. He can take the phone off the desk, close the tabs, set the timer, walk without headphones every now and then, read ten pages without turning it into an Olympic test. However, the digital environment remains built to extract attention, retain it, resell it, measure it. Calling it just “lack of concentration” is too convenient for those who plan that noise.
