A recent report by UK media watchdog Ofcom reveals that more than 80% of children aged 10–12 own a smartphone. For many, this is cause for concern. Public debates often focus on how devices might harm children’s mental health, expose them to social media pressures, or reduce time spent outdoors and face-to-face with others. Supporters counter that smartphones can keep children connected and help them find supportive communities.
But there’s another, less-discussed angle to consider: information overload.
As someone who studies the science of information, I’m familiar with one of nature’s fundamental laws — the second law of thermodynamics. Simply put, over time, order tends to give way to disorder. In information terms, meaningful content is inevitably drowned out by irrelevant “noise.”
Centuries ago, when communication was slow and difficult — think handwritten letters that took months to arrive — people shared only important news. No one would dream of sending a messenger hundreds of miles just to say their dog barked at the neighbor’s cat.
But with the arrival of printing, the telegraph, the internet, and now smartphones, sharing information has become effortless. And as communication becomes easier, the quality of what is shared often drops. Today, we’re flooded with trivial updates — not just about one friend’s pets, but about the pets of strangers across the globe.
This rising “noise” is not just an annoyance; it’s a natural consequence of how information systems evolve. Left unchecked, it’s nearly impossible to reverse — though careful effort can sometimes reduce it temporarily.
Signal vs. Noise
In communication theory, relevant information is called the signal; everything irrelevant or misleading is noise. Imagine a child researching the Solar System for school. They click on a webpage, only to be met with pop-up ads, unrelated videos, and endless comment threads. To find what they need, they must sift through — and unintentionally absorb — a lot of extra information.
The ratio of useful to useless content is called the signal-to-noise ratio. When noise doubles, it takes about twice as much time and effort to gather the same amount of useful knowledge. If noise increases exponentially, the time required to find good information also grows exponentially — in theory, you’d end up glued to your phone around the clock.
Worse still, the content we consume shapes what we look for next. In a noisy environment, it’s easy to drift aimlessly from one link to another without learning anything meaningful.
Finding a Way Forward
Nature offers a contrast. In biological systems, communication between animals or plants changes little over millennia, keeping noise relatively low. Humans, however, create technologies that amplify confusion.
Reducing noise for children means creating calmer, less overwhelming environments. Banning smartphones entirely may be unrealistic — and possibly counterproductive — but parents can still take steps:
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Feel confident saying “no” to a smartphone if appropriate.
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Foster open, honest conversations about healthy phone use.
The goal isn’t to cut children off from technology altogether, but to help them navigate an information-rich world without being buried in digital noise.