The Monkey Business Illusion

The Monkey Business Illusion is a visual and attention experiment, where viewers watch a video of people passing basketballs and are asked to count how many times the white team members pass the ball. During the video, a person in a gorilla suit walks through the scene, but many viewers focus so intently on counting that they don't notice the gorilla. This demonstrates "inattentional blindness," where focused attention causes people to overlook obvious stimuli that are in plain sight. It reveals how selective attention affects perception and how missing unexpected events can happen even when they are clearly visible.