Mobile phones on table in 54% sign
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Twins discover effects of social media in sleep survey

27 March 2014 Last updated at 10:39 GMT

School Reporters from Tarporley High School conducted an investigation into the impact of late-night social networking on their sleep patterns.

Identical twins Ollie and Chris mapped their social media use and sleep patterns over two nights. Their deputy head teacher was worried by the results - and maybe you will be too.