Saucier, G. & Srivastava, S.. (in press). What makes a good structural model of personality? Evaluating the Big Five and alternatives. In M. L. Cooper & R. Larsen (Eds.), Handbook of personality and social psychology: Personality processes and individual differences (Vol. 3). APA Books.
Personality psychology is challenged with the task of identifying the joints at which to carve a person, some minimally comprehensive set of attributes, processes, or other characteristics of a person that serves to describe them, predict behavior and events, and distinguish one person from another. This is Allport’s “unit problem.”