Are You A Believer? In business, there are two kinds of people: Those who like to use personality tests and those who roll their eyes. Can personality tests be used to categorize people’s behavior? Or would you answer the question differently if I asked: Can YOUR personality be categorized? The Evolution of Personality Tests Darwin’s evolution theory inspired Sir Galton. Galton's research in the 1880's, resulted in the birth of a personality classification system which influe