If you don’t notice something within 1.5 seconds, you may never see it

Inattentional blindness, a kind of selective focus, is so strong that if you don’t notice new objects in your sight line quickly, you may never see them at all

Source:
https://www.newscientist.com/article/2223992-if-you-dont-notice-something-within-1-5-seconds-you-may-never-see-it/?utm_campaign=RSS%7CNSNS&utm_source=NSNS&utm_medium=RSS&utm_content=home