A special case of information-selection by the human cognitive system. The brain seems to select the information worth to process, or most relevant, at every instant, in almost every context. This might produce some very specific phenomena such as what psychologists call “Change Blindness”. ————————— Such kind of experiments try to show the limits of our capacity to encode, retain, and compare visual information from one glance to the next. This suggests, among other issues, that our awareness of our visual surroundings is far more sparse than most people intuitively believe.