I’ve discussed a number of psychologists in the book. Here are some 20th-century psychologists who were particularly influential and are discussed in the book. For contemporary psychologists, see the page on this site devoted to contemporary research laboratories in personality psychology.
- A. A. Roback, one of the founders of personality psychology, who reviewed centuries of thought as to how human beings differed from one another.
- Gordon Allport, another founder of personality psychology, who spoke of personality as a system of neuropsychological systems and the behaviors they bring about.
- Sigmund Freud
- Betram Forer