I'm pretty sure Dr Bartle would object to generalizing HCDS out to the general population.
Also, to 'lifeisstillgood, Bartle actually expands on his paradigm in the book Designing Virtual Worlds, where he introduces another axis for the four types (bringing it to eight) and also specifies two progressions between the types as players grow.
Also, to 'lifeisstillgood, Bartle actually expands on his paradigm in the book Designing Virtual Worlds, where he introduces another axis for the four types (bringing it to eight) and also specifies two progressions between the types as players grow.
http://www.amazon.com/Designing-Virtual-Worlds-Richard-Bartl...
The man is alive and kicking and will probably take questions.