Psychologist Jayne Gackenbach has conducted a series of studies suggesting that hardcore players actually dream differently from other subjects and have more control over their dreaming. While usually I am a bit skeptical of studies trying to prove/disprove that gamers can become somehow cognitively different from non-players, this one is a long project that seems more credible than others. Of course, methodological and epistemological issues still remain – especially about the fact that it is terribly difficult to do a sistematic study of dreaming.