Today, in our health-conscious culture permeated by people eating kale, meditating, and working out, it seems tempting to regard the brain as just another muscle, one whose relevant parts can be “exercised” to keep them from getting flabby and plump. Memory exercises and meditation to the rescue! Puzzles, games, and challenges are today’s mental weights.
Perhaps not surprisingly, the results tend to show that the only benefits are very specific to what was actually practiced, and short lived. As the article points out, this is important because many people, including school systems, are paying money for these unproven products.