"Stanley Kubrick's The Shining, starring Jack Nicholson, has been named the perfect scary film, according to a new mathematical formula."
Entertainingly, the calculations appear to have some parallels to my personal three-category eek/ick/ook system for rating horror films. Specifically, "the formula combines elements of suspense, realism and gore, plus shock value, to measure how scary a film is." Those fit pretty well:
• Eek — "shock value": things jumping out suddenly and startling you.
• Ick — "realism and gore": things revolting you.
• Ook — "suspense": more broadly, things disturbing you.
And, as kviri has pointed out, there really needs to be a fourth category:
• Ack — things making you realise you're watching a terrible movie. :-)