This chapter explores how we react to other people. It looks at some of the processes involved in person perception, and then moves on to what psychologists have discovered about liking and attraction. Liking and attraction, though, are to do with our personal reactions to individuals. The chapter discusses some of the different types of social prejudice, and how they may be challenged in modern society. Prejudice isn't the same as aggression, of course, but in its extreme form it can certainly produce aggressive behaviour towards other people. Implicit personality theories can be triggered off by quite small items of information. The self-fulfilling prophecy is one of the most controversial, but also one of the most powerful, concepts in social psychology. Most studies of attraction have dealt with short-term attraction, and not really with what happens over the long term.