Parents who leave the TV on for hours - even when no one is watching - can harm their children’s speech development, say researchers."Background TV can harm childrens speech Their study found that both adults and children use significantly fewer words when the TV is competing for their attention.
Researchers studied 329 children aged between two months and four years with the help of digital recorders that captured everything they heard or said.
Children heard an average of 770 fewer words from adults - or 7 per cent - per additional hour of television exposure, according to a report in the the Archives of Paediatrics and Adolescent Medicine.
Lead researcher Dimitri Christakis, professor of paediatrics at the University of Washington School of Medicine, said: ‘We’ve known that television exposure during infancy is associated with language delays and attentional problems, but so far it has remained unclear why.
‘This study is the first to demonstrate that when the television is on, there is reduced speech in the home.
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