What do you see when you first glance at the image below? At first, it appears to be the letter "B," right?That's B for Bingo!But wait – look again. What does it resemble now? Suddenly, it transforms into the number 13.This illusion mirrors a study conducted in 1955. In the experiment, two groups of participants were shown different sets of stimuli: one group viewed letters, while the other group saw numbers. In both cases, an ambiguous figure resembling both the letter "B" and the number "13" was presented. The study revealed that participants who had been shown letters beforehand perceived the figure as a "B," while those who had seen numbers interpreted it as "13."This optical illusion demonstrates how perception can shift based on prior context – in this case, what the viewer had previously encountered.This leads us to an essential psychological concept known as a perceptual set. A perceptual set refers to the tendency to perceive things in a certain way, influenced by expectations, emotions, motivation, and cultural background. For instance, a person visiting your website might not immediately grasp the message if their mind is set on something different.In this optical illusion, if you can only see the letter "B" or the number "13," your perceptual organization – the brain's creative center – is active and dominant. However, if you're able to detect both the number "13" and the letter "B," according to Gestalt theory, the area of your brain responsible for memory organization, stimulus processing, and emotional regulation – the amygdala – is highly active and strong.