from the article:
"Wang did not say what kind of behavioral changes are to be expected"
Play video games for 10 hours per day for a week and of course brain activity will change. If that's all their experiment verified, then it's pure fail. A worthwhile experiment would have been to gather objective evidence as to what (if any) is the effect on patterns of behaviour or thoughts. You do ANY activity that intensely for a week and an MRI will reveal some kind of change. You think if you played tennis for a week they wouldn't detect anything? And as for the control group, shouldn't they play a non-violent game for the same amount of time? What if Hello Kitty Island Adventure has the same patters of brain activity changes? Can they state that they verified this is not the case?
Oh science, how I weep for you. You were ridiculed and punished for thousands of years, and now the general public accepted quasi-science in your stead. Acupuncture, homeopathic "medicine", mediums, studies that don't properly isolate the factor they're trying to test for. Will your time ever come?