According to the International Business Times, "Alien" and "Psycho" are two of the most popular horror films. The website claims that both films are the most Google searched horror movies in the United States as of 2015.
The research results come from a Halloween chain store, Halloween Express, which examined 20 of the most popular films using IMDB and Google searches. The company credits the films' high search frequencies to movie elements such as shock value and tension. "The Shining" and "The Exorcist" also had high search frequencies.
IMDB also allows users to view a list of popular recent horror films. Most films in the list have brief descriptions and reviews.