Screenwriter Joseph Stefano found the character of Norman Bates (as depicted in the novel) overly unsympathetic. He created a more likable Norman by eliminating darker elements of the novel. In the novel, Norman was a hard drinker, and was fascinated with "spiritualism, the occult and pornography". Stefano's version of the character never touched alcohol, and did not have a series of disturbing hobbies.

Film

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