This article claims a study shows that the cognitive abilities of 60-77 year olds can be helped by playing two weeks of World of Warcraft.
This article quotes a navy researcher as saying adults generally can get similar benefits:
"We have discovered that video game players perform 10 to 20 percent higher in terms of perceptual and cognitive ability than normal people that are non-game players," s
"We know that video games can increase perceptual abilities and short-term memory," he said. They allow the player to focus longer and expand the player's field of vision compared to people who don't play video games, he added.
And this article claims similar results for children.
Psychologists have discovered that the specially designed games act like a workout for the mind and after just eight weeks can lead to dramatic increases in IQ and test results.
Scientists studied 600 children who played an online game called Junglememory Children in the study have seen dramatic improvements in their ability to solve mathematical and verbal problems and have seen IQ scores jump by 10 after the course.
Will video games improve children's IQ (or other measurements of intelligence)?