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the cognitive challenges and attention problems that result from overuse of digital technology.

Almost all respondents (95 per cent) owned at least two digital devices

bio-behavioural sciences

Respondents who spent more than six hours daily on their digital devices were more likely to report experiencing forgetfulness in the past month compared to those who spent fewer hours

the survey for first time shows this connection between overuse or higher use of digital devices and more complaints of memory disturbances in Hongkongers

"digital immigrants"

In his 2008 book iBrain, Small talks about "digital natives"

The survey also found poor dietary and exercise habits among the respondents

The term digital dementia was coined a few years ago in South Korea, after doctors reported seeing young patients with memory and cognitive problems, conditions that were more commonly linked to brain injuries.

Samsung Medical Centre in Seoul, South Korea: "As people are more dependent on digital devices for searching information than memorising, the brain function for searching improves whereas an ability to remember decreases

Dr Manfred Spitzer, a German neuroscientist and author of the 2012 book Digital Dementia: What We and Our Children are Doing to our Minds,

warns that children who spend too much time on electronic devices could experience irreversible deficits in brain development.

multitasking teens

The devices are not all bad," he says. "It's really about content, context and dose

balance the online time with offline time