It has been argued that the content of any theory of personality is strongly infl uenced by the theorist’s own personality (e.g., Mindess, 1988). Why might a personality theorist want to believe that...

It has been argued that the content of any theory of personality is strongly infl uenced by the theorist’s own personality (e.g., Mindess, 1988). Why might a personality theorist want to believe that aspects of his or her personality are shared by everyone?