John B. Watson

John B. Watson was the founder of behaviorism, a school of thought that dominated American psychology for decades. His famous 'Little Albert' experiment demonstrated the power of classical conditioning in shaping emotional responses. Watson argued that psychology should be the science of observable behavior, rejecting the study of the mind or consciousness.

While his methods were controversial and his influence has waned in favor of cognitive approaches, his role in establishing the behaviorist tradition is foundational. His work remains a critical study in the history of psychological research and the development of behavioral science.