Get smarter  OCT 10 2013

Andrea Kuszewski shares some research about human intelligence and offers five techniques anyone can use to increase their IQ.

There are absolutely oodles of terrible things written and promoted on how to "train your brain" to "get smarter". When I speak of "brain training games", I'm referring to the memorization and fluency-type games, intended to increase your speed of processing, etc, such as Sudoku, that they tell you to do in your "idle time" (complete oxymoron, regarding increasing cognition). I'm going to shatter some of that stuff you've previously heard about brain training games. Here goes: They don't work. Individual brain training games don't make you smarter-they make you more proficient at the brain training games.

Now, they do serve a purpose, but it is short-lived. The key to getting something out of those types of cognitive activities sort of relates to the first principle of seeking novelty. Once you master one of those cognitive activities in the brain-training game, you need to move on to the next challenging activity. Figure out how to play Sudoku? Great! Now move along to the next type of challenging game. There is research that supports this logic.

A few years ago, scientist Richard Haier wanted to see if you could increase your cognitive ability by intensely training on novel mental activities for a period of several weeks. They used the video game Tetris as the novel activity, and used people who had never played the game before as subjects (I know-can you believe they exist?!). What they found, was that after training for several weeks on the game Tetris, the subjects experienced an increase in cortical thickness, as well as an increase in cortical activity, as evidenced by the increase in how much glucose was used in that area of the brain. Basically, the brain used more energy during those training times, and bulked up in thickness-which means more neural connections, or new learned expertise-after this intense training. And they became experts at Tetris. Cool, right?

Here's the thing: After that initial explosion of cognitive growth, they noticed a decline in both cortical thickness, as well as the amount of glucose used during that task. However, they remained just as good at Tetris; their skill did not decrease. The brain scans showed less brain activity during the game-playing, instead of more, as in the previous days. Why the drop? Their brains got more efficient. Once their brain figured out how to play Tetris, and got really good at it, it got lazy. It didn't need to work as hard in order to play the game well, so the cognitive energy and the glucose went somewhere else instead.

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