Place your right hand over your right eye and focus on the circle. Move your head slowly towards the screen while continuing to look at the circle. What happens to the cross on the left side?
This is called the human “blind spot”. In psychology we work with, among other things, perception. That is, how we interpret and process our surroundings. Because lots of things are not as we see and interpret them.
In psychology we try to understand how humans function through various theoretical approaches, such as culture, biology, cognitive abilities etc. Why can we easily read the correct color in this word: RED while it takes us longer to identify the correct color in these words: RED, BLUE, ORANGE?
We can understand this through something called the Stroop effect. You can test yourself here: