We tend to have more knowledge about people we like compared to those that we dislike. Intuitively, one would think if we have more knowledge about various individuals we would see them as being more unique. However, research suggest this is not always true. This series of studies investigated if people tend to view liked others as more similar to themselves and others when compared to disliked others despite having more knowledge about them. 

My Friends Are All Alike: Liking and Similarity  

Contains studies related to the role of liking and perceived similarity in person perception 

Alma College

Encompasses the various mental processes that we use to form impressions of others. Person perception refers to how e use various social cues and trait information to make judgements about that person's overall personality, identity, motives, etc. 

Person Perception

Alves, H., Koch, A., & Unkelbach, C. (2016). My friends are all alike—the relation between liking and perceived similarity in person perception. Journal of Experimental Social Psychology, 62, 103-117.

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