By Eben Harrell
"You've probably heard it before: the brain is a muscle that can be strengthened. It's an assumption that has spawned a multimillion-dollar computer-game industry of electronic brainteasers and memory games. But in the largest study of these games to date, a team of British researchers has found that healthy adults who undertake computer-based "brain training" do not improve their mental fitness in any significant way."
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