Video games may do the aging brain good

The study included 40 older adults who were randomly assigned to either the video-game group or a comparison group that received no training in the game. Over 1 month, the gamer group spent about 23 hours training in "Rise of Nations," an off-the-shelf video game where players seek world domination.

Ruling the world, the game group learned, requires a complex set of tasks, including military strategy, building cities, managing economies and feeding people.

Study participants who trained in the game ended up improving their scores in several areas of a battery of cognitive tests, Kramer and his colleagues found.