Neil Martin scared up a bunch of psychological research about how people respond to scary movies:
“(Why) Do You Like Scary Movies? A Review of the Empirical Research on Psychological Responses to Horror Films,” G. Neil Martin, Frontiers in Psychology, epub 2019. The author, at Regent’s University London, UK, explains:
“Despite a century of horror film making and entertainment, little research has examined the human motivation to watch fictional horror and how horror film influences individuals’ behavioral, cognitive, and emotional responses. This review provides the first synthesis of the empirical literature on the psychology of horror film using multi-disciplinary research from psychology, psychotherapy, communication studies, development studies, clinical psychology, and media studies.”