People playing computer games to train their brains might as well be playing Super Mario, new research suggests. In a six-week study, experts found people who played online games designed to improve their cognitive skills didn't get any smarter.

Researchers recruited participants from viewers of the BBC's science show Bang Goes the Theory. More than 8600 people aged 18 to 60 were asked to play online brain games designed by the researchers to improve their memory, reasoning and other skills for at least 10 minutes a day, three times a week.

They were compared to more than 2700 people who didn't play any brain games, but spent a similar amount of time surfing the Internet and answering general knowledge questions. All participants were given a sort of I.Q. test before and after the experiment.

Researchers said the people who did the brain training didn't do any better on the test after six weeks than people who had simply been on the Internet. On some sections of the test, the people who surfed the Net scored higher than those playing the games.