Some innate perceptual processes that effect our reality, utilize the stimulus quality of Continuity and Similarity to organize the figure.
If you answered B or D to the multiple choice question on the last page, you were RIGHT ‹perceptually,Š but WRONG pragmatically in terms of what I had in mind.
What I drew was an "M" perched on top of a "W." That, of course, would not typically be a person‰s first interpretation. That way of organizing the structure would run contrary to the quality of "Continuity." Here are some other examples of the Best Figure Possible.
Similarity: Notice in the following figure that we tend to group the dots on the basis of similarity.
Please view the graphic version here.
This grouping behavior is important in developing the figure in many images. This principle is used in color blind tests too (see Notes).
NOTES: This is a neat site on color blind tests.