Yes. The movie draws inspiration from some accounts that were thought to be true. However, in the process of making it into a film, a lot of creative liberties were taken. For example, the way the possession is shown in the movie might be more dramatized than what was originally reported in the real - life events it was based on. But overall, it has its roots in a true story.
It's not based on a true story. The plot and characters were imagined by the creators to provide a thrilling and suspenseful experience for the audience. There's no real-life incident behind it.
The possession is typically not based on a true story. It's more likely a figment of the writer's or filmmaker's imagination to thrill and engage the audience.
Yes. The movie draws inspiration from the concept of the dybbuk box. This box was supposedly haunted and had some strange and disturbing events associated with it in real life, which the movie then built upon to create its horror story.