Read: Bored yet? You should be
Rose Matafeo: Three days in my online life
Thomas Knee, 24, of London, said he had been addicted to "all things digital" since he taught himself computer programming when he was 10.
"I personally don't think I have a problem. I believe that if I am addicted, it has paid off by getting me a good job in a field that I love," he said.
The research found that just 2 per cent of people were "digital phobic" and 1 per cent were "digital deniers".
Steve Dilworth, Foresters' managing director, said: "It is increasingly the case that many feel dependent on this technology and begin to display worrying habits."
However, Dr David Giles, of Winchester University, who has studied social media addiction, said: "Judging by the criteria that Foresters seem to be using ... then I'm an addict. It doesn't strike me as particularly worrying to say that you love buying online. If [going online] doesn't actually cause distress - the primary concern for mental health - then what's the problem?"