"'If you set the level for these games to a very high level where you don't get the answers very often and it really annoys you, then it may be useful,' said Philip Adey, an emeritus professor of psychology and neuroscience at King's College in London.
If people are enjoying the brain games, Adey said they probably aren't being challenged and might as well be playing a regular video game.
He said people should consider learning a new language or sport if they really wanted to improve their brain power. 'To stimulate the intellect, you need a real challenge,' Adey said, adding computer games were not an easy shortcut. 'Getting smart is hard work.'"
