This document discusses several concepts from social psychology including first impressions, the halo effect, stereotypes, confirmation bias, and non-verbal communication. It defines each concept and provides examples. First impressions are formed instantly upon first encountering someone based on their appearance and characteristics. The halo effect is a cognitive bias where positive qualities are associated with other positive qualities in a person. Stereotypes involve making inferences about people based on their social categories. Confirmation bias refers to favoring information that confirms one's beliefs. Non-verbal communication conveys emotions through gestures, facial expressions, and other non-verbal cues.