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People are all increasingly glued to their smart phones and consumed by social media, but why? Panorama reporter Hilary Andersson tracks down tech insiders who reveal how social-media companies have deliberately developed habit-forming technology to get people hooked . A former Facebook manager tells the programme: 'Their goal is to addict you and then sell your time' and the creator of the 'like' button warns of the dangers of social-media addiction. Panorama investigates the science behind the lure of technology, and shows how behavioural science has been used to keep people endlessly checking their phones.