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Whether lying about raiding the biscuit tin or denying they broke a toy, all children try to mislead their parents at some time. Yet it now appears that babies learn to deceive from a far younger age than anyone previously suspected.
Following studies of more than 50 children and interviews with parents, Dr Vasudevi Reddy, of the University of Portsmouth's psychology department, says she has identified seven categories of deception used between six months and three-years-old.
Infants quickly learnt that using tactics such as fake crying and pretend laughing could win them attention. By eight months, more difficult deceptions became apparent, such as concealing forbidden activities or trying to distract parents' attention.