To be honest, I don't know exactly what story Psycho was based on. It could potentially draw from a variety of influences or be a wholly original creation by the author's imagination.
Psycho is purely fictional. It was crafted to provide a thrilling and suspenseful narrative rather than being drawn from real events. The characters and plot are products of imagination.
Well, 'Psycho 1960' is purely fictional. The plot and characters were crafted for the purpose of entertainment and not drawn from real-life events. The movie's impact lies in its creative storytelling rather than any real-life basis.