Commonly known as “ Change Blindess “ Perceptual Blindness is a subtle change in a visual stimulus or dataset that goes completely unnoticed relative to the observer. Perceptual Blindness could also be a result of “ attentional blinking “ when you shift your focus from one stimulus to another, the crevice in the attention span is called “ attentional blink “ it only occurs for only a fraction of a second so it goes unnoticed.
Blinking actually triggers a momentary shifting in the brains activity from an area that helps us focus attention the dorsal attention network to an area responsible for subconscious processing the default-mode network once the eyes opened again, brain activity shifted back. In a way,
Your brain is constantly bombarded with information from all senses and you may have discovered you’re not able to give 100% of your attention to all of them, hence why some things will slide past you unnoticed. The attentional blink also occurs to allow your brain processing time on the one stimulus is has set focus on. This leads into “ Inhibition Theory “ where the brain takes time defragmenting information on a set stimulus resulting in a attention gap.
The “ Interference Theory “ suggests when the brain is being bombarded with information and stimulus in all senses, the results are possibly loosing focus on original stimulus and focusing on something completely in contrast and unrelated, an example of this could be you carrying on a conversation then suddenly stopping and shifting your focus on to the television, our brains are innately and hardwired to be attracted to a moving stimulus in this case, flashing pixels. A overload on one stimulus can result into a “ Information overload “ meaning receiving mass amounts of data that’s never processed and assimilated into a long action potential.
Perceptual Blindness has given guidance to other aspects of visual perception and the role in ways attention influences them, given the dynamic nature of a scene perception must rely on attentional management yielding attention as effectively as possible, an important factor here is the teir of which the observer expects a change.
The teir of perceptual blindness is found much higher when the observer doesnt expect a change in stimulus, another important fact here is the type of change. Observers only appear to be sensitive to changes that are relevant to stimulus that is active at the moment change was made. Attentional management also plays a role in the the intelligence of the observer, this can influence perception by particular representations. Dectection of change is better for objects learned at a specific level.
Olivers, C. N. L. Attentional blink effect. In H. Pashler (Ed.). Encyclopedia of the Mind, Volume 1. Los Angeles: SAGE Publications, Inc; 2013.