A certain amount of screen time is 'just right' for teenagers

It's a common worry among parents: teenagers spending all their time staring at a TV or computer screen.

It’s based on a theory that says too much screen time is bad for teenagers’ mental wellbeing and is known as the ‘displacement hypothesis’.

This hypothesis states that every hour spent staring at a screen displaces an hour of socialising, reading or exercising, and therefore means more screen time is always a bad thing. However, a team of UK researchers now say that’s not necessarily the case.

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