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Page last updated at 10:04 GMT, Friday, 23 November 2012

Warning to cut TV for young children

Watching In The Night Garden on CBeebies

By Saadi Haeri and Spencer Kelly
BBC Click

Children under three should not watch screens, a leading psychologist says.

Dr Aric Sigman is warning that screens "may produce" an increased level of dopamine in children's brains.

He suggests this could lead to a dependency on screen media when they are older.

There are calls for more research to be carried out as there is currently no conclusive evidence on the effects of screen media on young children's brains.

There is also growing concern around the world that very young children should not watch any screens at all.