A new paper looking to validate the User Types HEXAD Survey has just been released from the HCI Games Group (Games Institute, and Cheriton School of Computer Science, University of Waterloo). You can find it here Empirical validation of the Gamification User Types Hexad scale in English and Spanish or free… http://hcigames.com/download/empirical-validation-hexad-scale/
One of the findings is something that has been noted before and is not a surprise to me, but something I realise I have never explained. The finding is that the Philanthropist and Socialiser types are very closely linked when you look into them.