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In A Hyperconnected Brazil, Children Exposed Early To Screens Have Their Brains Shaped By Digital Stimuli That Increase Anxiety And Favor Digital Dependency In Adolescence.
In just a few years, screens have gone from being an exception to a permanent scenario in childhood, with children who can barely walk already sliding their fingers on smartphones in routines that increase anxiety later on. Now, a study tracking over a decade indicates that early exposure to smartphones and tablets in the first two years of life not only alters brain development but is also linked to decision-making difficulties and higher levels of anxiety in pre-adolescence.
In practice, this means that the seemingly innocuous habit of calming a baby with colorful videos may have a cumulative effect down the line. The research published in an international scientific journal used advanced neuroimaging exams to show that too many screens during the phase when the brain grows the fastest disrupt brain connections, affect performance on cognitive tests, and, over time, increase anxiety at ages 12 and 13, creating a more fragile psychological landscape for an entire generation.
What Happens To The Brain When The Screen Arrives Before Play
The first two years of life are described by researchers as the period of greatest transformation of the brain.
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According to the study, between 70% and 80% of the changes in size and number of neurons occur in this window, when each stimulus received helps sculpt the connections that will support learning, behavior, and emotions.
It is during this phase that many babies already have smartphones and tablets taking the place of toys, cuddles, and direct interaction, spending hours in front of fast images, sounds, and constant shifts in attention.
The team behind the study emphasizes that any form of intense exposure, including screens, has a significant impact on brain development.
Instead of tactile experiences, eye contact, and exploration of the physical environment, the child concentrates a large part of their cognitive energy on a single type of stimulus.
How The Study Tracked Children From Birth To Pre-Adolescence
The work is part of a large birth study in Singapore. The scientists recruited over a thousand mothers while still pregnant and began tracking the families over more than a decade.
To closely examine the effects of screens, they selected about 170 children, those who were able to be brought to the laboratory repeatedly to scan their brains at different points in childhood.
These children were evaluated at 4 and a half years, 6 years, and 7 and a half years, always with advanced neuroimaging exams measuring the functioning of the nervous system.
Then, they returned at 8 and a half years for cognitive tests, where researchers observed how they made decisions, handled tasks, and processed information.
This allowed for cross-referencing the history of screen exposure with the way their brains were maturing.
Altered Connections, Worse Decisions, And A More Fragile Emotional Future
The results indicate that intense exposure to screens in the early years impairs brain connections and is linked to a lower ability to make good decisions.
In other words, the neural networks that should integrate different areas of the brain become less efficient, which reflects in lower performance on tests conducted in childhood.
This sequence of small losses, according to the authors, is not restricted to the lab or paperwork. The succession of these processes means that when they reach ages 12 and 13, these children exhibit higher levels of anxiety, compared to those who had less screen time early in life.
Screens that occupy the place of varied experiences and real interactions end up creating a path where anxiety increases later on, precisely at the stage when social and academic life becomes more complex.
When Screen Addiction Is No Longer A Child Issue
The problem, however, is not limited to childhood. The report presenting the study highlights the case of Stephanie, an advertising professional who spends about 13 hours a day in front of screens, combining work, smartphone, and computer.
The habit reached the point where she uses her smartphone even in the shower and replaces meetings with friends and family with the silent company of the internet.
For the most part, the usage began as something functional, related to work. But gradually, the pattern changed. Instead of a tool, the screen became a refuge, a way to escape reality and in-person relationships.
This type of prolonged use also increases anxiety in adults, fuels comparison patterns on social media, and contributes to an almost constant state of psychological alertness.
Hyperconnected Brazil: 9 Hours A Day In A Country That Does Not Turn Off
Data from an international consultancy shows that Brazil ranks second in the world for the most time connected to the internet, at about 9 hours a day. At first glance, this may seem just a sign of modernity and access.
But experts point out that the problem begins when use ceases to be functional, focused on study, work, or communication, and starts to occupy a central and dominant space in daily life.
Games, social media, gambling, and pornography are designed to exploit the psychological vulnerabilities of our brain, triggering quick rewards, constant notifications, and cycles of expectation and frustration. In mental health terms, these scenarios are referred to as behavioral addictions.
For over 30 years, science has understood that the brain can become dependent not only on chemical substances but also on behaviors that are excessively pleasurable.
In such a scenario, long digital journeys increase anxiety and make it difficult to unplug, both in teenagers and adults.
Behavioral Addiction And Childhood That Is Already Born Connected
When experts talk about behavioral addiction, they are referring precisely to that: usage patterns that hijack attention, reduce other sources of pleasure, and wear out emotional balance.
With children picking up smartphones before learning to talk and getting tablets before they can walk, this pattern can settle in earlier than ever.
If the brain is exposed from the start to digital experiences that increase anxiety in the long run, adolescence tends to arrive with less emotional reserve to deal with frustrations, conflicts, and social pressure.
At the same time, the adults around them often reinforce the cycle, using screens as babysitters, rewards, or quick anesthetics for any discomfort.
In the end, the study raises a red flag that is relevant from the living room to the consulting room: when childhood is overshadowed by excessive screens, the consequences do not stay just in immediate behavior, but can project years ahead, in how the brain matures and in the intensity of anxiety that each one carries.
And in your home, do you feel that the way smartphones and tablets are used in daily life increases anxiety in children, teenagers, or even adults?
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