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A professor of behavioural addiction, Dr Mark Griffiths, tells MPs why he doesn't limit screen time for his three children.

He is one of four psychologists to give evidence to a Commons inquiry into the impact of screen use and social media on young people.

They were in broad agreement that there's no causal link between screen time and poor mental health.

Kristiina Cooper reports for Today in Parliament.

You can hear more from Today in Parliament at 11.30pm on Radio 4.