Law Of Similarity
The law of similarity can describe two concepts.
The first is one of Aristotle's laws of association and the law of similarity proposes that when two things are alike the thought of one will trigger the thought of the other. For example, when we think of a beach ball we might visualize a volleyball as well because they are both balls that are thrown around when at the beach.
A second conceptualization of the law of similarity is in Gestalt psychology. It states that the law of similarity is the tendency to perceptually group similar items and objects together. Gestalt psychology focuses on how we perceive individual items as a whole. To illustrate the law of similarity, look at the grouping of items below:
AAAAA BBBBB CCCCC
If asked to describe this most people would say there are three rows of letters instead of five columns of letters. This is because of the law of similarity - individuals are more likely to group the similar items together. It is a grouping based on the likeness between objects.
Another example could be seen in how a person organizes their clothing. It is more common that a person would put their pants and shorts in the same drawer rather than pants/shirts and shorts/socks. Pants and shorts are more likely to be grouped together because they are more similar to each other.