That doesn’t necessarily mean screens cause permanent harm – the science isn’t settled and context matters – but it raises important questions about how different kinds of screen engagement intersect with development.

Another piece of the puzzle is sleep and emotional health. A large longitudinal study following children over several years found that greater daily screen time in late childhood was associated with higher levels of depressive symptoms in early adolescence.

Researchers suggested that shorter sleep and changes in brain connectivity partly explained the relationship.

Language and Interaction

Many studies also point to a connection between too much passive screen time and language development. When screens replace real conversations, reading or play, children may miss out on rich linguistic input – the back-and-forth dialogue, tone, gesture and context that help build vocabulary and communication skills.

This concern isn’t just theoretical. Reporting on early childhood development has highlighted toddlers with higher screen exposure sometimes demonstrate smaller vocabularies compared with peers who spend more time in conversation and reading environments.

It’s important to emphasize that the type and context of screen use matters.

Educational co-viewing with a caregiver, video chats with family members and thoughtfully designed interactive content can have different developmental impacts than passive scrolling or binge watching.

Emotional and Social Effects

Beyond cognitive concerns, excessive screen time has been associated in some research with emotional and behavioural challenges – including symptoms of anxiety, depression, reduced attention and difficulties with emotional regulation.

These associations do not mean screens automatically make children anxious or depressed – many factors influence mental health – but they underline that digital habits deserve a place in conversations about child safety and development.

A Balanced View

This isn’t a call to ban screens. Technology has tremendous educational and social value when used purposefully. But balance and intention matter.

Children’s brains are still wiring, especially in early childhood and adolescence. Activities like reading, imaginative play, face-to-face conversation, physical movement and adequate sleep are developmental investments – not luxuries.

Screens themselves are not the enemy. The challenge is balance. When large amounts of passive screen time replace activities like conversation, play, movement and reading, children may lose experiences that are essential for healthy brain development.

What Parents and Schools Can Do

Be intentional: Choose screen content thoughtfully. Educational and social interactions are stronger than passive watching.
Co-view and engage: Talk about what children see and hear. Interaction matters more than exposure alone.
Prioritize sleep and play: Healthy routines support brain development just as much as curriculum. Adults’ habits influence children’s habits.

Safety in schools – and in childhood – isn’t just about eliminating physical danger. It’s about cultivating environments, habits and connections that help young brains grow resilient, curious and capable.

Screens will be part of that future but how we use them will shape whether they help or hinder the children we raise.

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Editor’s Note: This opinion piece reflects the views of its author, and does not necessarily represent the views of CFJC Today or Pattison Media.

by Karla Pearce

PEARCE: Screens, brains and the cost of digital childhood

What the Research Suggests

Language and Interaction

Emotional and Social Effects

A Balanced View

What Parents and Schools Can Do

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