Allowing pre-school children to play on iPads and watch lots of television affects their development by the age of five, researchers have found.
Scientists assessed the communication, dexterity, problem solving and personal skills of 2,400 children at the age of two, three and five.
They found those who were exposed to the most screentime at the age of two showed poorer development by the age of three.
And those who spent most time in front of a screen at the age of three had poorer development at age five.
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