Companies marketing “brain games” that are meant to slow or reverse age-related memory decline and enhance other cognitive functions are exploiting customers by making “exaggerated and misleading claims” that are not based on sound scientific evidence, according to an open letter signed by 73 psychologists, cognitive scientists and neuroscientists from around the world.
“Many scientists cringe at exuberant advertisements claiming improvements in the speed and efficiency of cognitive processing and dramatic gains in ‘intelligence’,” they write, saying the games may have the opposite effect by making the player less socially and physically active.
http://www.theguardian.com/science/2014/oct/23/brain-games-memory-loss-open-letter