Preliminary analysis of Goldberg's clustered adjectives and data from Activity Vector Analysis suggest five factors but some differences.
References
1.
GoldbergL. R. (1990) An alternative “description of personality”: The big-five factor structure. Journal of Personality and Social Psychology, 59, 1216–1229.
2.
NormanW. T. (1963) Toward an adequate taxonomy of personality attributes. Journal of Abnormal and Social Psychology, 66, 574–583.
3.
NormanW. T. (1967) 2800 personality trait descriptors: Normative operating characteristics for a university population. Ann Arbor, MI: Department of Psychology, Univer. of Michigan.