19:00 28 May 03
NEW SCIENTIST: Philip Cohen
Computer game players score off the charts in several standard vision tests, a new study has revealed, suggesting the games are not the utter waste of time some think. Furthermore, the visual skills of non-gamers improve dramatically after just 10 hours of playing action games.
These visual skills do translate into real-life activities, not just gaming, believes Daphne Bavelier of the Center for Visual Science at the University of Rochester in New York state, who carried out the research. They might help visual performance in sports, for example, and one other study suggests the skills are linked to driving ability in the elderly.
But kids will not be able to use the findings as an excuse for gaming instead of doing their homework. "This certainly doesn't mean children can learn by playing video games all day long," says Bavelier. She doubts the games cultivate the sustained attention needed for tasks such as reading, for example.
"Bavelier is really onto something - it merits serious attention," says Michael Stryker at the University of California, San Francisco. But he points out that the particular skills gamers acquire could even cause problems. "They are so attentive to peripheral details that I bet it impairs their ability to focus on one thing."
Daily dose
Bavelier became intrigued by the effects of games after her student Shawn Green, a keen gamer, discovered he was extremely adept at the standard vision tests they used in the lab. And it was not just Green. The pair found that, compared with nonplayers, students who had played action games such as Grand Theft Auto3, Spiderman and 007 almost daily for at least six months performed far better in certain visual tasks.
These included identifying the location of a target object on a cluttered computer screen, counting the number of quickly flashed objects and correctly identifying two objects flashed in quick succession. "These tests are nothing like the video games they were playing," says Bavelier.
Of course, there was a possibility that all these stereotypical male gamers were more visually skilled to start with. To prove that action games really do improve visual abilities, Bavelier and Green tested the visual skills of male and female nongamers before and after gaming one hour per day for 10 days.
Nine students who played an action game called Medal of Honor more than doubled their skills at some tasks. Eight others played Tetris, a game that requires players to concentrate on one object at a time, rather than distributing and switching attention around the visual field like action games. These students did not get any better at the visual tasks.
Sense of danger
Bavelier suspects that it is the complex demands placed on the visual system by action games that leads to the improvements. But other aspects of gaming might also play a role: the heightened awareness created by a sense of danger, the sensory overload of sounds, colours and action, or the challenge of beating other players.
She would like to tease apart those effects, so that she can create programs that improve visual performance without exposing patients to the violent images that dominate many of the games. Such programs might help stroke victims and other patients with damaged visual systems.
"The sheer magnitude of the effect of these games and that the skills generalised to a broad array of tasks is very exciting, " says vision expert Marvin Chun of Vanderbilt University in Nashville, Tennessee.
Journal reference: Nature (vol 423, p 534)