Researchers at the University of Iowa had groups of people aged 50 to 64 years old and those over 65 play a video game named Road Tour. The game involves identifying a vehicle and matching it was a road sign.
Researchers found that, a year after testing, those who played the video game for ten hours gained at least three years of cognitive improvement.
Playing the game an extra four hours added another year worth of improvement.
Read more at University of Iowa