It has long been known that pessimists live longer, that optimists are poorly informed pessimists, that the glass is half full, or empty...
But in everyday psychology there is a funny test for pessimism.
https://cdn.pixabay.com/photo/2018/05/27/02/33/optical-illusion-3432703__340.png
In the picture "Vase-profile" pessimists often look at black - on profiles, and optimists - on white, on a vase.
https://cdn.pixabay.com/photo/2017/10/16/22/07/cranium-2858764__340.png
If you invert the colors, and change the object of attention.
In this case, attention is switched and those, and others, but more often fixed on something one.
What about you?
Vase or profile?