Why we miss subtle visual changes; why it keeps us sane
There is a visual discontinuity in a scene with Bogart and Paul Henreid in Casablanca -think you know what it is? "Casablanca" is one of my favorite movies, though it contains one noticeable discontinuity that I didn't catch until the tenth or twelfth time I watched it. Why don't we see these things? Here's research that explains why. (If you need to know what the visual goof is in Casablanca, email me, and I'll tell you.) E ver notice how Harry Potter's T-shirt abruptly changes from a crew neck to a Henley shirt in 'The Order of the Phoenix,' or how in 'Pretty Woman,' Julia Roberts' croissant inexplicably morphs into a pancake? Don't worry if you missed those continuity bloopers. Vision scientists have discovered an upside to the brain mechanism that can blind us to subtle changes in movies and in the real world. They've discovered a "continuity field" in which we visually merge together similar objec