Change Blindness The white-haired man was giving directions to one experimenter (a), who disappeared behind the moving door (b), only to be replaced by another experimenter (c). Like many other people, the man failed to detect a seemingly obvious change.
Simons, D. J., & Levin, D. T. (1998). Failure to detect changes to people during a real-world interaction. Psychonomic Bulletin & Review, 5(4), 644–649. Figure provided by Daniel Simons.