In "The Changeling", George C. Scott, whose wife and child have recently died in a freak accident, moves into a haunted house. There he sees a ball bouncing down the stairs by itself.
Like Liam Neeson's character in The Haunting (1999), Dr. Koven conducts sleep experiments; and he speaks of a haunted house in the Berkshires, the setting of The Haunting (1999).