Okay, so imagine you are playing a game on your computer or phone, and you are looking at the screen. When you move your eyes around the screen, the things on the screen change or move too. This is called the gaze-contingency paradigm. It means that what you see on the screen depends on where you are looking.
Scientists use this idea to study how our brains work when we look at things. They can use special computers that track where a person's eyes are looking on the screen. Then, they can change or move things on the screen based on where the person is looking. This helps them learn more about how our brains process what we see.
Think of it like a game where your eyes are the controller. The screen changes based on where you look, and scientists use this to study the brain.