British scientists have found that when it comes to teens and television, internet surfing, or computer games, extra screen time has an impact on grades.

Extra Screen Time Has an Impact on GradesResearchers from Cambridge University studied more than 800 students aged 14 and 15.  They concluded that when the teens spend an extra hour a day watching television, surfing the internet, or playing computer games, they can perform up to two grades behind on exams when compared to their peers who do not log the extra screen time.

The team also found that physical activity did not affect academic performance .

“We only measured this.. in Year 10, but this is likely to be a reliable snapshot of participants’ usual behavior, so we can reasonably suggest that screen time may be damaging to a teenager’s grades,” said Kirsten Corder of Cambridge’s Centre for Diet and Activity Research, who co-led the work.

The study found that the average screen time per day was four hours.  It was published in the International Journal of Behavioral Nutrition and Physical Activity.

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