The "family similarity theory" in aesthetics refers to the fact that people's aesthetic experience is influenced by family similarities. The theory is that everyone's family has some common characteristics and values, and these characteristics and values will play an important role in people's aesthetic experience. For example, the similarities of a family might include similar appearances, similar cultural habits, similar hobbies, and so on. These family similarities would resonate in people's aesthetic perception, causing people's aesthetic evaluation of certain things to be similar. The theory of family resemblance was widely used in literature, art, psychology, and other fields. For example, in literary works, people might resonate with family history and similarities, resulting in similar emotional reactions to the characters and plots in the works. In art, similarity can also be used to explain why the same work of art will receive similar evaluations at different times and places. In psychology, this theory was also applied to the study of people's perception and evaluation of similar objects, as well as people's emotional reactions to similarity.