Studying exclusively people who already are regular players of a fantasy role playing game blows any kind of cause and effect thinking completely out of the water, because the kinds of people who are going to exhibit those symptoms are very likely to be playing computer games. (Speaking as the husband of a therapist who works with young children with ASD, who has found that watching me playing games gives her a mine of information to use as an excellent point of connection with the children she works with.)

Mind you, it’s not really any different to the “violent media make people violent” line of thinking that completely ignores the fact that people with violent fantasies are more likely to want to see films/read books/play games that fit in with their violent fantasies, so I guess it shouldn’t come as much of a surprise…