It's logical to think that you see whenever your eyes are open. But the reality is that attention plays a major role in visual perception. One of the primary reasons why you may fail to notice things like obvious bloopers in movies, for example, is a psychological phenomenon known as inattentional blindness. When you focus hard on one thing, such as the actions of the main character in a film, you might not notice unexpected things entering your visual field.
The term "inattentional blindness" was first coined by psychologists Arien Mack, Ph.D., and Irvin Rock, Ph.D., who observed the phenomenon during their perception and attention experiments. "Because this inability to perceive, this sighted blindness, seemed to be caused by the fact that subjects were not attending to the stimulus but instead were attending to something else...we labeled this phenomenon inattentional blindness (IB)," they explained.
One of the best-known experiments demonstrating inattentional blindness is the "invisible gorilla test" carried out by Christopher Chabris, Ph.D. and Daniel Simons, Ph.D. In this experiment, researchers asked participants to watch a video of people tossing a basketball, and the observers were told to count the number of passes or to keep track of the number of throws versus bounce passes. Afterward, the participants were asked if they had noticed anything unusual while watching the video. In most of the tests, approximately 50 percent of the participants reported seeing nothing out of the ordinary.
But in reality, something odd had happened. In some instances, a woman dressed in a gorilla suit strolled through the scene, turned to the camera, thumped her chest, and walked away. While it may seem impossible that the participants missed such a sight since their attention was focused elsewhere and on a demanding task, the gorilla basically became invisible.
Rather than focusing on every tiny detail in the world around us, we tend to concentrate on things that are most important, relying on our existing schemas to "fill in the blanks." This is highly economical. As our attentional, cognitive, and processing resources are limited, this allows us to dedicate them to what matters most, while still allowing us to have complete, seamless experiences.
One of the reasons why people so often "miss the gorilla," so to speak, is simply because the stimulus lacks what is known as ecological validity. A gorilla showing up in the middle of a basketball game is unlikely to happen in a real-world setting, so we are less likely to notice it. It is essentially ruled out as a component that will help you better understand or carry out the task at hand.
That said, while we do sometimes fail to miss things in the world around us, we are generally pretty good at noticing information that is relevant to us, such as a car speeding toward us or a deer jumping out of the trees into the road. Of course, this is not always the case.
We all experience inattentional blindness from time to time, such as in these potential situations:
There are certain factors that can affect inattentional blindness. Drs. Simons and Chabris did an experiment similar to the invisible gorilla experiment, but in this one, the participants had to count the number of passes made by either the team in black or the team in white.
Out of the participants who were counting passes made by the white team, only 42 percent saw the gorilla, but for the participants who counted passes made by the black team, 83 percent saw the gorillawho was also dressed in black, illustrating the impact of similarity between the unexpected stimulus (gorilla) and task-relevant stimuli (members of the black team).
In the "Encyclopedia of Human Memory, psychologist Kristin Mauldin notes that inattentional blindness is similar to change blindness, which is when you miss a change in a stimulus that was there before. In inattentional blindness, you miss a new stimulus, often because of your own expectations.
A Word From Verywell
Though it is not possible to avoid all instances of inattentional blindness, it's important to remember this very natural occurrenceparticularly when you are in a disagreement with someone about the full scope of a situation. Your brain is sophisticated enough to help you register and interpret visual cues that it thinks will provide you with the most value. But, in its efforts, visual informationboth important and notcan sometimes get overlooked.
Read the rest here:
Inattentional Blindness in Psychology - Verywell Mind
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