I was disappointed to not read more details in the article. What kind of/specific video games and are they playing the same idiot game repeatedly (trying to get a higher score) or a going from game to game and exactly how does one compare to TV watching, by time alone?

They did say it could be a two-way street with those who have short attention span being attracted to video games instead of video games causing short attention span. But they may have gone a bit too far for me, hypothesizing that you might have a child starting with short span and it would be exacerbated by the video game playing.