Behaviorism is a highly deterministic view that declares there is no free will, defines psychology as the science of behavior. Pavlov, Watson, Thorndike and Skinner are the four major psychologists that help develop and enhance this view. They studied behavioral responses and the ways those responses are influenced by stimuli in the environment. .
The psychoanalytic view largely focuses on the unconscious influencing human behavior. Developed by Sigmund Freud and his followers (the neoFreudians), the main idea was that humans are born with unconscious drives that seek some kind of outlet or expression from the very start. This deterministic viewpoint says that there is no such thing as free will.
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