When we are focused on one task, we often fail to notice something obvious within our field of vision. This phenomenon, known as inattentional blindness, was famously demonstrated in a study of people wearing gorilla costumes, but the participants were unable to detect it. But now it seems that gorillas are not so invisible, and we actually take in information, even if we may be missing the big picture.
In a classic 1999 experiment,, Daniel Simmons and Christopher Chabris after that…
Source: www.newscientist.com