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Message: <blockquote data-quote="Obryn" data-source="post: 4748554" data-attributes="member: 11821">This right here is a confounding variable, unless maybe there's a missing comma after "groups"  (At which point my questions only multiply...)D&D is an inherently self-selected group-based activity.  (Much like with football, you can't "play football" without several others also playing.)  If your survey includes, say, 10 groups with 6 members each, the individuals in those groups will tend to co-vary in their gaming preferences.  They are self-selected because, presumably, they all want to play the game the group is playing.In plain English, if I survey 10 randomly selected Vampire: The Masquerade groups and 10 randomly selected 3e groups, I will get significantly different answers for each game, even though the sample size is the same and each gaming group was, itself, randomly selected from all groups that play that game.-O</blockquote>