::I think we should distinguish between three types of content.  One page (this one) should describe the five traits.  A separate page (perhaps "Hierarchical structure of the Big Five") should talk about the relationship of the five traits to superordinate traits (like alpha and beta) and subordinate facets (like talkativeness, energy).  Finally, there should be separate pages for EACH measure of the five traits (for example, NEO-PI-R).  I'm not sure if the relationships between the five traits and other variables (such as personality disorders) belong in ANY of these articles.  What do the wikipedia guidelines say about that?