Watch: 14-Minute Video Essay Explores The Differences Between Alfred Hitchcock's 'Psycho' And Robert Bloch's Novel

Though it opened to mixed reviews, “Psycho” is now considered one of Alfred Hitchcock’s best films, and “is often considered to be the original slasher film.” Scary as the movie is, "Psycho" is perhaps even more terrifying for the fact that it is loosely based on actual events. In November 1957, Wisconsin-based killer Ed Gein was arrested for the gruesome murders of two women (though there’s ample evidence that he killed many more). Two years later, author Robert Bloch released a suspense novel titled “Psycho” about middle-aged, murderous Norman Bates who runs a motel with his mother. That book, of course, was the basis for Hitchcock’s now classic horror film. But how true was the film to Bloch’s book?

READ MORE: 5 Things You Might Not Know About Alfred Hitchcock's 'Psycho'

In the latest entry in their “What’s the Difference?” series, CineFix “takes you step-by-step and page-by-page through all the differences between your favorite movies & shows and their source...