Well, reading the PDF was anticlimactic. Why? Because page 2 of the PDF describes the 12 games that were used. They were games that test memorization, puzzle completion, and pattern matching.<p>In other words, the "commercial video games" used in their research were "brain games" and not Pac-Man, Mario Bros, and Call of Duty, etc.<p>If you've ever taken a <i>real</i> IQ test where the proxy shows you cards to match or pictures with "missing" data, the 12 video games they used are very similar in spirit. It's not surprising that there is high correlation between the scores of those particular types of video games and real IQ tests.<p>However, that's not to say there is zero correlation between blockbuster video games like Call of Duty and IQ. Maybe another study will pursue that.