The influence of culture and environment can have an effect on our visual perception - believe it or not. This theory was first explored by Robert Laws, a Scottish missionary working in Africa during the late 1800's. Take a look at the picture - what you see will largely depend on where you live in the world.
When scientists showed a similar sketch to people from East Africa, nearly all the participants in the experiment said she was balancing a box or metal can on her head. In a culture containing few angular visual cues, the family is seen sitting under a tree. Westerners, on the other hand, are accustomed to the corners and boxlike shapes of architecture. They are more likely to place the family indoors and to interpret the rectangle above the woman's head as a window through which shrubbery can be seen.
