09/10/2012

Experts Urge Limiting Screen Time For Children

Experts have called for the amount of time children spend in front of screens to be limited in an effort to stave off development and health problems.

Leading psychologist Dr Aric Sigman says children of all ages are watching more screen media than ever, and starting earlier.

He says the average 10-year-old has access to five different screens at home, warning that as a result some are becoming addicted to them or depressed as a result.

Writing in the Archives of Disease in Childhood, Dr Sigman says a child born today will have spent a full year glued to screens by the time they reach the age of seven.

"In addition to the main family television, for example, many very young children have their own bedroom TV along with portable hand-held computer game consoles (eg, Nintendo, Playstation, Xbox), smartphone with games, internet and video, a family computer and a laptop and/or a tablet computer (eg iPad),” he says.

Adding: "Children routinely engage in two or more forms of screen viewing at the same time, such as TV and laptop."

Dr Sigman cites a string of published studies suggesting links between prolonged screen time and conditions such as heart disease, stroke and diabetes.

But also suggests the effects go further than those simply associated with being sedentary for long periods, saying that prolonged screen time can lead to a reduction in attention span because of its effects on the brain chemical dopamine.

Dopamine is a key component of the brain's reward system and implicated in addictive behaviour and the inability to pay attention, Dr Sigman says it is produced in response to "screen novelty."

"Screen 'addiction' is increasingly being used by physicians to describe the growing number of children engaging in screen activities in a dependent manner," Dr Sigman says.

He says there are many questions remaining about the precise nature of the association between screen time and adverse outcomes, but adds: "The advice from a growing number of both researchers and medical associations and government departments elsewhere is becoming unequivocal - reduce screen time."

(H)


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