New Delhi, June 7 -- Optical illusion personality tests have become quite popular these days. Why? Because they're simple, fun, and claim to uncover your inner thoughts and feelings in just a few minutes. But how do they actually work? These tests are based on basic psychological principles and can give insight into your personality very quickly.

Take this particular image, for example. It was first shared on Instagram by Marina Winberg. When you look at it, you might either see an apple core or two human faces. Marina says that what you see first can reveal whether you're more of a logical thinker or an intuitive person.

"This image is a classic dual-illusion where you can either see two faces (a man and a woman) looking at each other ...