Dissonance- When something does not "fit", but rubs uncomfortably against
other information, it is said to be dissonant. Humans have a low tolerance
for dissonant information and tend to perceive things in such a way as to
remove dissonance, even if this means "seeing" what is not there
- or not seeing what is! At first glance the picture (right) may seem to contain
three rectangular shapes, a closer look reveals the problem!
- Image based on idea by Oscar Reutersvard