Video Games

Video Games

One of the most popular video games ever created is called Tetris. It involves falling tile-like tetrominoes that a player must quickly maneuver so they fit into space at the bottom of the screen. In the early 1990s, Richard Haier, a professor of psychology at the University of California at Irvine, tracked cerebral glucose metabolic rates in the brains of Tetris players using PET scanners. The glucose rates show how much energy the brain is consuming, and thus serve as a rough estimate of how much work the brain is doing. Haier determined the glucose levels of novice Tetris players as their brains labored to usher the falling blocks into correct locations. Then he took levels again after a month of regular play. Even though the test subjects had improved their game performance by a factor of seven, Haier found that their glucose levels had decreased. It appeared that the escalating difficulty of the game trained the test subjects to mentally manipulate the Tetris blocks with such skill that they barely broke a cognitive sweat completing levels that would have utterly confounded them a month earlier.

Nearly a decade after Haier's study, Gee hit upon an explanation. He found that even escapist fantasy games are embedded with one of the core principles of learning—students prosper when the subject matter challenges them right at the edge of their abilities. Make the lessons too difficult and the students get frustrated. Make them too easy and they get bored. Cognitive psychologists call this the “regime of competence” principle. Gee's insight was to recognize that the principle is central to video games: As players progress, puzzles become more complex, enemies swifter and more numerous, underlying patterns more subtle. Most games don't allow progress until you've reached a certain level of expertise.

This is exactly the model of how Tetris works: When you first launch the game, the blocks fall at a leisurely pace, giving you plenty of time to rearrange them as they descend so they'll fit the spaces where they fall and gradually build up a wall that fills the screen. As you get better at manipulating the blocks, the game starts dropping them at increasing speeds.

To understand why games might be good for the mind, begin by shedding the cliché that they are about improving hand-eye coordination and firing virtual weapons. The majority of video games on the best-seller list contain no more ...