I need to locate information in the textbook Introduction to Psychology, written by James Kalat, the eighth edition. I need to contrast the major eras of psychology, noting the contributions of influential figures:
1. physiological roots (Wundt, Titchener, James, Darwin, Galton)
2. behavioral roots (Watson)
3. clinical roots (Freud)
4. recent trends (e.g., neuroscience, new fields of application such as health and sports, human diversity)