Which psychologist stated that the only appropriate form of psychology was observable behavior?

The psychologist who stated that the only appropriate form of psychology was observable behavior is John B. Watson. Watson is known as one of the founders of behaviorism, a school of thought in psychology that emphasizes the study of observable behaviors rather than internal mental states or consciousness. He argued that psychology should focus solely on what can be measured and observed, dismissing introspection and the study of the mind as subjects of psychology. This perspective was foundational in shaping behaviorist theories and applications in fields such as education and therapy.

In contrast, the other psychologists listed have different focuses within the field. Sigmund Freud, for example, is known for psychoanalysis, which emphasizes the importance of unconscious processes and internal mental states. Abraham Maslow is recognized for his humanistic approach, particularly the hierarchy of needs and self-actualization, highlighting subjective experiences and individual potential. Carl Jung, also a psychoanalyst, focused on concepts such as the collective unconscious and archetypes, which delve into deeper psychological realms beyond observable behavior. Therefore, Watson’s commitment to observable behavior distinctly defines his contribution to psychology.