Wilhelm Wundt is considered the father of modern psychology. In 1879, he established the first psychology laboratory in Leipzig, Germany, marking psychology as a distinct scientific discipline separate from philosophy. He is known for his work in structuralism, where he focused on understanding the structure of the mind through introspection.
While Sigmund Freud (A) is highly influential in psychology, especially in psychoanalysis, Wundt's role in establishing psychology as a formal scientific discipline is unparalleled. John B. Watson (C) is known for behaviorism, and Carl Rogers (D) is a central figure in humanistic psychology, but neither has the same claim to the title of "father of modern psychology."