Change blindness is one of the best known demonstrations of the importance of visual attention in analyzing and remembering a scene. Only those parts of the scene that are attended to are likely to be remembered from one second to the next. If something is outside of the attentional focus, very little information is retained. Dr. Ron Rensink was one of the first researchers to systematically use this demonstration to show the role of attention in scene analysis. In this interview, Dr. Rensink explains his current view of the role of attention in perception and describes the main elements of the change blindness paradigm.